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<?php |
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/** |
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* @package VikWP - Libraries |
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* @subpackage adapter.database |
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* @author E4J s.r.l. |
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* @copyright Copyright (C) 2023 E4J s.r.l. All Rights Reserved. |
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* @license http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL |
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* @link https://vikwp.com |
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*/ |
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|
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// No direct access |
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defined('ABSPATH') or die('No script kiddies please!'); |
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|
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/** |
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* Helper class to run some useful functions for the database framework. |
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* |
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* @since 10.0 |
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*/ |
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abstract class JDatabaseHelper |
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{ |
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/** |
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* Splits the given SQL statement in single queries. |
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* |
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* @param string $sql A staring containing multiple queries. |
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* |
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* @return array A list of queries. |
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*/ |
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public static function splitSql($sql) |
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{ |
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$start = 0; |
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$open = false; |
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$comment = false; |
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$endString = ''; |
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$end = strlen($sql); |
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$queries = array(); |
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$query = ''; |
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|
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for ($i = 0; $i < $end; $i++) |
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{ |
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$current = substr($sql, $i, 1); |
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$current2 = substr($sql, $i, 2); |
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$current3 = substr($sql, $i, 3); |
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$lenEndString = strlen($endString); |
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$testEnd = substr($sql, $i, $lenEndString); |
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|
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if ($current == '"' || $current == "'" || $current2 == '--' |
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|| ($current2 == '/*' && $current3 != '/*!' && $current3 != '/*+') |
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|| ($current == '#' && $current3 != '#__') |
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|| ($comment && $testEnd == $endString)) |
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{ |
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// check if quoted with previous backslash |
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$n = 2; |
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|
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while (substr($sql, $i - $n + 1, 1) == '\\' && $n < $i) |
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{ |
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$n++; |
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} |
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|
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// not quoted |
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if ($n % 2 == 0) |
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{ |
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if ($open) |
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{ |
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if ($testEnd == $endString) |
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{ |
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if ($comment) |
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{ |
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$comment = false; |
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if ($lenEndString > 1) |
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{ |
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$i += ($lenEndString - 1); |
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$current = substr($sql, $i, 1); |
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} |
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$start = $i + 1; |
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} |
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$open = false; |
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$endString = ''; |
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} |
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} |
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else |
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{ |
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$open = true; |
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if ($current2 == '--') |
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{ |
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$endString = "\n"; |
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$comment = true; |
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} |
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elseif ($current2 == '/*') |
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{ |
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$endString = '*/'; |
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$comment = true; |
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} |
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elseif ($current == '#') |
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{ |
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$endString = "\n"; |
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$comment = true; |
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} |
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else |
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{ |
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$endString = $current; |
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} |
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if ($comment && $start < $i) |
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{ |
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$query = $query . substr($sql, $start, ($i - $start)); |
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} |
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} |
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} |
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} |
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|
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if ($comment) |
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{ |
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$start = $i + 1; |
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} |
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|
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if (($current == ';' && !$open) || $i == $end - 1) |
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{ |
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if ($start <= $i) |
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{ |
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$query = $query . substr($sql, $start, ($i - $start + 1)); |
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} |
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$query = trim($query); |
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|
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if ($query) |
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{ |
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if (($i == $end - 1) && ($current != ';')) |
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{ |
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$query = $query . ';'; |
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} |
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$queries[] = $query; |
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} |
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|
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$query = ''; |
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$start = $i + 1; |
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} |
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} |
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|
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return $queries; |
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} |
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} |
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|
