60 lines
1.4 KiB
PHP
60 lines
1.4 KiB
PHP
<?php
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/**
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* Query
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*
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* Free Query Builder / Database Abstraction Layer
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*
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* @package Query
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* @author Timothy J. Warren
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* @copyright Copyright (c) 2012
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* @link https://github.com/aviat4ion/Query
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* @license http://philsturgeon.co.uk/code/dbad-license
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*/
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// --------------------------------------------------------------------------
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/**
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* Utility Class to parse sql clauses for properly escaping identifiers
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*
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* @package Query
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* @subpackage Query
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*/
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class Query_Parser {
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/**
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* Regex patterns for various syntax components
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*
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* @var array
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*/
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private $match_patterns = array(
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'function' => '`([a-zA-Z0-9_]+\((.*?)\))`',
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'identifier' => '`([a-zA-Z0-9"_-]+\.?)+`',
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'operator' => '`=|AND|&&?|~|\|\|?|\^|/|>=?|<=?|-|%|OR|\+|NOT|\!=?|<>|XOR`'
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);
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/**
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* Regex matches
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*
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* @var array
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*/
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public $matches = array(
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'functions' => array(),
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'identifiers' => array(),
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'operators' => array(),
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);
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/**
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* Constructor/entry point into parser
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*
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* @param string
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*/
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public function __construct($sql = '')
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{
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preg_match_all($this->match_patterns['function'], $sql, $this->matches['functions'], PREG_SET_ORDER);
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preg_match_all($this->match_patterns['identifier'], $sql, $this->matches['identifiers'], PREG_SET_ORDER);
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preg_match_all($this->match_patterns['operator'], $sql, $this->matches['operators'], PREG_SET_ORDER);
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}
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}
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// End of query_parser.php
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