gistfile1.php

<?php
/**
* Text_PatternMatch
* =================
* テキストを適当にマッチング。
*
* Licence: MIT License
* Author : chobie ( http://twitter.com/chobi_e )
* Created_at: 2010-05-18
*
* Useage:
* $data = "[block]somedata[block]";
* $tm = new Text_PatternMatch($data);
* $tm->left_delimiter = "{{";
* $tm->right_delimiter = "}}";
* $result = $tm->match('[block]{{$string}}[block]');
* //array (
* //  'string' => 'somedata',
* //)
*
**/
class Text_PatternMatch{
	protected $version = "0.1-alpha";
	protected $data;

	public $left_delimiter = "{{";
	public $right_delimiter = "}}";

	public function __construct($data){
		$this->data = $data;
	}

	public function getVersion(){
		return $this->version;
	}

	public function match($pattern){
		$head = $tail = "";
		trim($pattern,"\r\n");
		$result = array();

		$regexp = '/' . preg_quote($this->left_delimiter) . '\$(.+?)' . preg_quote($this->right_delimiter) . '/';
		preg_match_all($regexp,$pattern,$matches);
		$variables = $matches[1];

		if($items = preg_split($regexp,$pattern)){
			$count = count($items);
			$length = strlen($this->data);
			$offset = 0;

			for($i=0;$i<$count;$i++):
				$prefix = $items[$i];
				$prefix_length = strlen($prefix);

				if($i+1<$count){
					$suffix = $items[$i+1];
				}else{
					break;
				}

				$suffix_length = strlen($suffix);
				for($x=$offset,$lookprefix = false,$looksuffix = false;$x<$length;$x++):
					if($lookprefix === false){
						if(substr($this->data,$x,$prefix_length) == $prefix){
							$lookprefix = $x+$prefix_length;
							$x = $lookprefix;
						}
					}else{
						if(substr($this->data,$x,$suffix_length) == $suffix){
							$looksuffix = $x;
							break;
						}
					}
					$offset = $x;
				endfor;

				$key = array_shift($variables);
				if(!empty($key)){
					$result[$key] = substr($this->data,$lookprefix,($looksuffix-$lookprefix));
				}
			endfor;
			
			return $result;
		}
	}
}