480 lines
20 KiB
PHP
480 lines
20 KiB
PHP
<?php
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class XMLConnection
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{
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var $phptype = 'myxml';
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var $caseFolding = true;
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var $xmldoc = null;
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var $xmlFile = '';
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/**
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* XMLConnection
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*
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* @param string $file
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* @return void
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*/
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public function XMLConnection ($file)
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{
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$this->xmldoc = new Xml_Document();
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$this->xmldoc->parseXmlFile( $file );
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$this->xmlFile = $file;
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}
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/**
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* &query
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* Actualy the only one supported query is simple SELECT.
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*
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* @param string $sql
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* @return object(XMLResult) $result
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*/
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public function &query ($sql)
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{
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if (! isset( $this->xmldoc )) {
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$err = new DB_Error( "Error: Closed xmlConnection." );
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return $err;
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}
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if (1 === preg_match( '/^\s*SELECT\s+([\w\W]+?)(?:\s+FROM\s+`?([^`]+?)`?)(?:\s+WHERE\s+([\w\W]+?))?(?:\s+GROUP\s+BY\s+([\w\W]+?))?(?:\s+ORDER\s+BY\s+([\w\W]+?))?(?:\s+BETWEEN\s+([\w\W]+?)\s+AND\s+([\w\W]+?))?(?:\s+LIMIT\s+(\d+)\s*,\s*(\d+))?\s*$/im', $sql, $matches )) {
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$sqlColumns = $matches[1];
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$sqlFrom = isset( $matches[2] ) ? $matches[2] : '';
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$sqlWhere = isset( $matches[3] ) ? $matches[3] : '';
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$sqlGroupBy = isset( $matches[4] ) ? $matches[4] : '';
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$sqlOrderBy = isset( $matches[5] ) ? $matches[5] : '';
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$sqlLowLimit = isset( $matches[8] ) ? $matches[8] : '';
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$sqlHighLimit = isset( $matches[9] ) ? $matches[9] : '';
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/* Start Block: Fields list */
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$count = preg_match_all( '/\s*(\*|[\w\.]+)(?:\s+AS\s+([\w\.]+))?/im', $sqlColumns, $match, PREG_PATTERN_ORDER | PREG_OFFSET_CAPTURE );
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$fieldsList = array ();
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for ($r = 0; $r < $count; $r ++) {
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$name = (is_array( $match[2][$r] ) && $match[2][$r][0] !== '') ? $match[2][$r][0] : $match[1][$r][0];
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$fieldsList[$name] = $match[1][$r][0];
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}
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/* End Block */
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/* Start Block: Order list */
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$count = preg_match_all( '/\s*(\*|[\w\.]+)(\s+ASC|\s+DESC)?\s*,?/im', $sqlOrderBy, $match, PREG_PATTERN_ORDER | PREG_OFFSET_CAPTURE );
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$orderList = array ();
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for ($r = $count - 1; $r >= 0; $r --) {
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$direction = (is_array( $match[2][$r] ) && $match[2][$r][0] !== '') ? $match[2][$r][0] : 'ASC';
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$direction = strtoupper( $direction );
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$orderList[$match[1][$r][0]] = $direction;
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}
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/* End Block */
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$xmlFrom = '/' . str_replace( '.', '/', $sqlFrom );
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$node = & $this->xmldoc->findNode( $xmlFrom );
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if (! isset( $node )) {
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//$err = new DB_Error( "$xmlFrom node not found in $dsn." );
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throw new Exception( "$xmlFrom node not found in " . $this->xmlFile . "." );
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return $err;
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} else {
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$res = $this->fetchChildren( $node );
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}
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/* Start Block: WHERE*/
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if ($sqlWhere !== '') {
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/*Start Block: Replace the operator */
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$blocks = preg_split( '/("(?:(?:[^"]|"")*)"|\'(?:(?:[^\']|\'\')*)\')/im', $sqlWhere, - 1, PREG_SPLIT_DELIM_CAPTURE );
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$sqlWhere = '';
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for ($r = 0; $r < sizeof( $blocks ); $r ++) {
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if (($r % 2) === 0) {
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$blocks[$r] = str_replace( '=', '==', $blocks[$r] );
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$blocks[$r] = str_replace( '<>', '!=', $blocks[$r] );
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$blocks[$r] = str_replace( 'AND', '&&', $blocks[$r] );
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$blocks[$r] = str_replace( 'and', '&&', $blocks[$r] );
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$blocks[$r] = str_replace( 'OR', '||', $blocks[$r] );
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$blocks[$r] = str_replace( 'or', '||', $blocks[$r] );
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$blocks[$r] = str_replace( 'NOT', '!', $blocks[$r] );
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$blocks[$r] = str_replace( 'not', '!', $blocks[$r] );
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$blocks[$r] = preg_replace( '/\b[a-zA-Z_][\w\.]*\b/im', '$res[$r][\'$0\']', $blocks[$r] );
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$blocks[$r] = preg_replace( '/\$res\[\$r\]\[\'(like)\'\]/im', '$1', $blocks[$r] );
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}
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$sqlWhere .= $blocks[$r];
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}
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$sqlWhere = preg_replace_callback( '/(.+)\s+like\s+("(?:(?:[^"]|"")*)"|\'(?:(?:[^\']|\'\')*)\')/im', array ('XMLConnection','sqlWhereLike'
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), $sqlWhere );
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$sqlWhere = preg_replace_callback( '/"(?:(?:[^"]|"")*)"|\'(?:(?:[^\']|\'\')*)\'/im', array ('XMLConnection','sqlString'
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), $sqlWhere );
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$newRes = array ();
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for ($r = 0; $r < sizeof( $res ); $r ++) {
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$evalWhere = false;
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@eval( '$evalWhere = ' . $sqlWhere . ';' );
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if ($evalWhere) {
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$newRes[] = $res[$r];
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}
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}
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$res = $newRes;
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}
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/* End Block */
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/* Start Block: Expands the resultant data according to fill an array
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* with the required fields in the query.
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*/
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for ($r = 0; $r < sizeof( $res ); $r ++) {
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$res[$r] = $this->expandFields( $res[$r], $fieldsList );
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}
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/* End Block */
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/* Start Block: ORDER BY*/
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foreach ($orderList as $field => $direction) {
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for ($i = 0; $i < sizeof( $res ); $i ++) {
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for ($j = $i + 1; $j < sizeof( $res ); $j ++) {
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$condition = ($direction === 'ASC') ? ($res[$j] < $res[$i]) : ($res[$j] > $res[$i]);
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if ($condition) {
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$swap = $res[$i];
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$res[$i] = $res[$j];
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$res[$j] = $swap;
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}
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}
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}
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}
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/* End Block */
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/* Start Block: Apply limits */
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if ($sqlLowLimit != '' && $sqlHighLimit != '') {
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$sqlLowLimit = (int) $sqlLowLimit;
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$sqlHighLimit = (int) $sqlHighLimit;
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$res = array_slice( $res, $sqlLowLimit, $sqlHighLimit );
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}
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/* End Block */
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$result = new XMLResult( $res );
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return $result;
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} elseif (1 === preg_match( '/^\s*DELETE\s+FROM\s+`?([^`]+?)`?(?:\s+WHERE\s+([\w\W]+?))?\s*$/im', $sql, $matches )) {
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$sqlFrom = isset( $matches[1] ) ? $matches[1] : '';
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$sqlWhere = isset( $matches[2] ) ? $matches[2] : '1';
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/* Start Block: WHERE*/
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/*Start Block: Replace the operator */
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$blocks = preg_split( '/("(?:(?:[^"]|"")*)"|\'(?:(?:[^\']|\'\')*)\')/im', $sqlWhere, - 1, PREG_SPLIT_DELIM_CAPTURE );
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$sqlWhere = '';
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for ($r = 0; $r < sizeof( $blocks ); $r ++) {
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if (($r % 2) === 0) {
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$blocks[$r] = str_replace( '=', '==', $blocks[$r] );
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$blocks[$r] = str_replace( '<>', '!=', $blocks[$r] );
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$blocks[$r] = str_replace( 'AND', '&&', $blocks[$r] );
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$blocks[$r] = str_replace( 'and', '&&', $blocks[$r] );
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$blocks[$r] = str_replace( 'OR', '||', $blocks[$r] );
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$blocks[$r] = str_replace( 'or', '||', $blocks[$r] );
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$blocks[$r] = str_replace( 'NOT', '!', $blocks[$r] );
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$blocks[$r] = str_replace( 'not', '!', $blocks[$r] );
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$blocks[$r] = preg_replace( '/\b[a-zA-Z_][\w\.]*\b/im', '$res[$r][\'$0\']', $blocks[$r] );
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$blocks[$r] = preg_replace( '/\$res\[\$r\]\[\'(like)\'\]/im', '$1', $blocks[$r] );
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}
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$sqlWhere .= $blocks[$r];
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}
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/* End Block */
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$sqlWhere = preg_replace_callback( '/(.+)\s+like\s+("(?:(?:[^"]|"")*)"|\'(?:(?:[^\']|\'\')*)\')/im', array ('XMLConnection','sqlWhereLike'
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), $sqlWhere );
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$sqlWhere = preg_replace_callback( '/"(?:(?:[^"]|"")*)"|\'(?:(?:[^\']|\'\')*)\'/im', array ('XMLConnection','sqlString'
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), $sqlWhere );
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/*Start Block: Removing fields */
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$xmlFrom = '/' . str_replace( '.', '/', $sqlFrom );
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$node = & $this->xmldoc->findNode( $xmlFrom );
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if (! isset( $node )) {
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$err = new DB_Error( "$xmlFrom node not found!." );
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return $err;
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} else {
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$res = $this->fetchChildren( $node );
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}
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$newRes = array ();
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for ($r = 0; $r < sizeof( $res ); $r ++) {
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$evalWhere = false;
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@eval( '$evalWhere = ' . $sqlWhere . ';' );
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if ($evalWhere) {
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unset( $node->children[$r] );
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$newRes[] = $res[$r];
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}
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}
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//Re-index
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$node->children = array_values( $node->children );
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/* End Block */
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$this->xmldoc->save( $this->xmlFile );
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$result = new XMLResult( $newRes );
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return $result;
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} elseif (1 === preg_match( '/^\s*INSERT\s+INTO\s+`?([^`]+?)`?\s*\(([\w\W]+?)\)\s+VALUES\s*\(([\w\W]+?)\)\s*$/im', $sql, $matches )) {
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$sqlFrom = isset( $matches[1] ) ? $matches[1] : '';
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$sqlColumns = isset( $matches[2] ) ? $matches[2] : '1';
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$sqlValues = isset( $matches[3] ) ? $matches[3] : '1';
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$xmlFrom = '/' . str_replace( '.', '/', $sqlFrom );
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$node = & $this->xmldoc->findNode( $xmlFrom );
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/* Start Block: Fields list */
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$count = preg_match_all( '/([\w\.]+)/im', $sqlColumns, $match, PREG_PATTERN_ORDER | PREG_OFFSET_CAPTURE );
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$fieldsList = array ();
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for ($r = 0; $r < $count; $r ++) {
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$fieldsList[] = $match[1][$r][0];
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}
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/* End Block */
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/* Start Block: Fields Values */
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$count = preg_match_all( '/("(?:(?:[^"]|"")*)"|\'(?:(?:[^\']|\'\')*)\'|\d+)/im', $sqlValues, $match, PREG_PATTERN_ORDER | PREG_OFFSET_CAPTURE );
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$fieldsValues = array ();
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for ($r = 0; $r < $count; $r ++) {
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if (substr( $match[1][$r][0], 0, 1 ) === '"') {
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$match[1][$r][0] = substr( $match[1][$r][0], 1, - 1 );
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$match[1][$r][0] = str_replace( '""', '"', $match[1][$r][0] );
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$match[1][$r][0] = str_replace( "''", "'", $match[1][$r][0] );
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}
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if (substr( $match[1][$r][0], 0, 1 ) === "'") {
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$match[1][$r][0] = substr( $match[1][$r][0], 1, - 1 );
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$match[1][$r][0] = str_replace( "''", "'", $match[1][$r][0] );
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$match[1][$r][0] = str_replace( '""', '"', $match[1][$r][0] );
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}
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$fieldsValues[$fieldsList[$r]] = $match[1][$r][0];
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}
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/* End Block */
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$AAA = getNames( $this->xmldoc->children[0]->children );
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$this->insertRow( $node, $fieldsValues );
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$DDD = getNames( $this->xmldoc->children[0]->children );
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$this->xmldoc->save( $this->xmlFile );
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$result = new XMLResult( array ($fieldsValues
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) );
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return $result;
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} elseif (1 === preg_match( '/^\s*UPDATE\s+`?([^`]+?)`?\s+SET\s+((?:(?:[a-z][\w\.]*)\s*=\s*(?:"(?:(?:[^"]|"")*)"|\'(?:(?:[^\']|\'\')*)\'|\d+)\s*(?:,\s*)?)+)(?:\s+WHERE\s+([\w\W]+?))?\s*$/im', $sql, $matches )) {
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$sqlFrom = isset( $matches[1] ) ? $matches[1] : '';
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$sqlColumns = isset( $matches[2] ) ? $matches[2] : '';
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$sqlWhere = isset( $matches[3] ) ? $matches[3] : '1';
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$count = preg_match_all( '/([a-z][\w\.]*)\s*=\s*("(?:(?:[^"]|"")*)"|\'(?:(?:[^\']|\'\')*)\'|\d+)/im', $sqlColumns, $match, PREG_PATTERN_ORDER | PREG_OFFSET_CAPTURE );
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$fieldsValues = array ();
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for ($r = 0; $r < $count; $r ++) {
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if (substr( $match[2][$r][0], 0, 1 ) === '"') {
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$match[2][$r][0] = substr( $match[2][$r][0], 1, - 1 );
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$match[2][$r][0] = str_replace( '""', '"', $match[2][$r][0] );
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$match[2][$r][0] = str_replace( "''", "'", $match[2][$r][0] );
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}
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if (substr( $match[2][$r][0], 0, 1 ) === "'") {
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$match[2][$r][0] = substr( $match[2][$r][0], 1, - 1 );
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$match[2][$r][0] = str_replace( "''", "'", $match[2][$r][0] );
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$match[2][$r][0] = str_replace( '""', '"', $match[2][$r][0] );
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}
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$fieldsValues[$match[1][$r][0]] = $match[2][$r][0];
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}
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/* Start Block: WHERE*/
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/*Start Block: Replace the operator */
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$blocks = preg_split( '/("(?:(?:[^"]|"")*)"|\'(?:(?:[^\']|\'\')*)\')/im', $sqlWhere, - 1, PREG_SPLIT_DELIM_CAPTURE );
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$sqlWhere = '';
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for ($r = 0; $r < sizeof( $blocks ); $r ++) {
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if (($r % 2) === 0) {
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$blocks[$r] = str_replace( '=', '==', $blocks[$r] );
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$blocks[$r] = str_replace( '<>', '!=', $blocks[$r] );
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$blocks[$r] = str_replace( 'AND', '&&', $blocks[$r] );
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$blocks[$r] = str_replace( 'and', '&&', $blocks[$r] );
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$blocks[$r] = str_replace( 'OR', '||', $blocks[$r] );
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$blocks[$r] = str_replace( 'or', '||', $blocks[$r] );
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$blocks[$r] = str_replace( 'NOT', '!', $blocks[$r] );
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$blocks[$r] = str_replace( 'not', '!', $blocks[$r] );
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$blocks[$r] = preg_replace( '/\b[a-zA-Z_][\w\.]*\b/im', '$res[$r][\'$0\']', $blocks[$r] );
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$blocks[$r] = preg_replace( '/\$res\[\$r\]\[\'(like)\'\]/im', '$1', $blocks[$r] );
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}
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$sqlWhere .= $blocks[$r];
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}
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/* End Block */
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$sqlWhere = preg_replace_callback( '/(.+)\s+like\s+("(?:(?:[^"]|"")*)"|\'(?:(?:[^\']|\'\')*)\')/im', array ('XMLConnection','sqlWhereLike'
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), $sqlWhere );
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$sqlWhere = preg_replace_callback( '/"(?:(?:[^"]|"")*)"|\'(?:(?:[^\']|\'\')*)\'/im', array ('XMLConnection','sqlString'
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), $sqlWhere );
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/*Start Block: Removing fields */
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$xmlFrom = '/' . str_replace( '.', '/', $sqlFrom );
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$node = & $this->xmldoc->findNode( $xmlFrom );
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if (! isset( $node )) {
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$err = new DB_Error( "$xmlFrom node not found in $dsn." );
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return $err;
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} else {
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$res = $this->fetchChildren( $node );
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}
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$newRes = array ();
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for ($r = 0; $r < sizeof( $res ); $r ++) {
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$evalWhere = false;
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@eval( '$evalWhere = ' . $sqlWhere . ';' );
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if ($evalWhere) {
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$this->updateRow( $node->children[$r], $fieldsValues );
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$newRes[] = array_merge( $res[$r], $fieldsValues );
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}
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}
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/* End Block */
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$nodeTEST = & $this->xmldoc->findNode( $xmlFrom );
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$this->xmldoc->save( $this->xmlFile );
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$result = new XMLResult( $newRes );
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return $result;
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} else {
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echo ($sql);
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$err = new DB_Error( "SQL Query is not well formed." );
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return $err;
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}
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}
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/**
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* sqlLike
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*
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* @param string $a
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* @return void $b
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*/
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public function sqlLike ($a, $b)
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{
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$b = addcslashes( $b, '[]()\/{}.?' );
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$b = str_replace( "%", '.*', $b );
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$b = '/^' . $b . '$/im';
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return preg_match( $b, $a );
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}
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/**
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* expandFields
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*
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* @param string $resRow
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* @param string $fieldsList
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* @return array $res
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*/
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public function expandFields ($resRow, $fieldsList)
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{
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$res = array ();
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foreach ($fieldsList as $key => $value) {
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if ($key === '*') {
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foreach ($resRow as $k => $v) {
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$res[$k] = $v;
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}
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} else {
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$res[$key] = array_key_exists( $value, $resRow ) ? $resRow[$value] : null;
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}
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}
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return $res;
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}
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/**
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* fetchNode
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*
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* @param object &$node
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* @return array $res
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*/
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public function fetchNode (&$node)
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{
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$res = array ('XMLNODE_NAME' => $node->name,'XMLNODE_TYPE' => $node->type,'XMLNODE_VALUE' => $node->value
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);
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foreach ($node->attributes as $name => $value) {
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if ($this->caseFolding) {
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$name = strtoupper( $name );
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}
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$res[$name] = $value;
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}
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return $res;
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}
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/**
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* fetchChildren
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*
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* @param string &$node
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* @return array $res
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*/
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public function fetchChildren (&$node)
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{
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$res = array ();
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foreach ($node->children as $name => $child) {
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$res[] = $this->fetchNode( $child );
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}
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return $res;
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}
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/**
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* disconnect
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*
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* @return void
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*/
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public function disconnect ()
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{
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unset( $this->xmldoc );
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}
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/**
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*
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* @param array $match
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* @return object(DB_Error) $err
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*/
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public function sqlWhereLike ($match)
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{
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switch (substr( $match[2], 0, 1 )) {
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case '"':
|
|
return ' $this->sqlLike( ' . $match[1] . ', ' . $match[2] . ' ) ';
|
|
break;
|
|
case "'":
|
|
return ' $this->sqlLike( ' . $match[1] . ', ' . $match[2] . ' ) ';
|
|
break;
|
|
default:
|
|
$err = new DB_Error( "XMLDB: Syntax error on $match[0]" );
|
|
die();
|
|
return $err;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* sqlString
|
|
*
|
|
* @param array $match
|
|
* @return object(DB_Error) $err
|
|
*/
|
|
public function sqlString ($match)
|
|
{
|
|
switch (substr( $match[0], 0, 1 )) {
|
|
case '"':
|
|
$match[0] = substr( $match[0], 1, - 1 );
|
|
$match[0] = str_replace( '""', '"', $match[0] );
|
|
$match[0] = str_replace( "''", "'", $match[0] );
|
|
$match[0] = addcslashes( $match[0], '\\\'' );
|
|
return "'$match[0]'";
|
|
break;
|
|
case "'":
|
|
$match[0] = substr( $match[0], 1, - 1 );
|
|
$match[0] = str_replace( "''", "'", $match[0] );
|
|
$match[0] = str_replace( '""', '"', $match[0] );
|
|
$match[0] = addcslashes( $match[0], '\\\'' );
|
|
return "'$match[0]'";
|
|
break;
|
|
default:
|
|
$err = new DB_Error( "XMLDB: Syntax error on $match[0]" );
|
|
die();
|
|
return $err;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* insertRow
|
|
*
|
|
* @param string &$node
|
|
* @param object $values
|
|
* @return void
|
|
*/
|
|
public function insertRow (&$node, $values)
|
|
{
|
|
$attributes = array ();
|
|
foreach ($values as $field => $value) {
|
|
switch ($field) {
|
|
case 'XMLNODE_NAME':
|
|
case 'XMLNODE_TYPE':
|
|
case 'XMLNODE_VALUE':
|
|
break;
|
|
default:
|
|
$attributes[strtolower( $field )] = $value;
|
|
}
|
|
}
|
|
$values['XMLNODE_NAME'] = ! isset( $values['XMLNODE_NAME'] ) ? '' : $values['XMLNODE_NAME'];
|
|
$values['XMLNODE_TYPE'] = ! isset( $values['XMLNODE_TYPE'] ) ? 'open' : $values['XMLNODE_TYPE'];
|
|
$values['XMLNODE_VALUE'] = ! isset( $values['XMLNODE_VALUE'] ) ? '' : $values['XMLNODE_VALUE'];
|
|
$node->addChildNode( new Xml_Node( $values['XMLNODE_NAME'], $values['XMLNODE_TYPE'], $values['XMLNODE_VALUE'], $attributes ) );
|
|
}
|
|
|
|
/**
|
|
* updateRow
|
|
*
|
|
* @param string &$node
|
|
* @param object $values
|
|
* @return void
|
|
*/
|
|
public function updateRow (&$node, $values)
|
|
{
|
|
foreach ($values as $field => $value) {
|
|
switch ($field) {
|
|
case 'XMLNODE_NAME':
|
|
$node->name = $value;
|
|
break;
|
|
case 'XMLNODE_TYPE':
|
|
$node->type = $value;
|
|
break;
|
|
case 'XMLNODE_VALUE':
|
|
$node->value = $value;
|
|
break;
|
|
default:
|
|
$node->attributes[strtolower( $field )] = $value;
|
|
}
|
|
}
|
|
}
|
|
}
|