Home >php教程 >php手册 >php中单字符串匹配算法实例

php中单字符串匹配算法实例

WBOY
WBOYOriginal
2016-05-26 08:21:101612browse

前面介绍过一个字符吕匹配例子,这里再介绍一个单字符串匹配例子,希望对各位会有所帮助,代码如下:

<?php 
	/* 
	最简单字符串匹配算法php实现方式 
	 
	T: ababcabc 
	P: abc 
	 
	0.          1.          2. 
	ababcabc    ababcabc    ababcabc 
	|||          |||          ||| 
	abc          abc          abc 
	(X)          (X)          (O) 
	 
	3.          4.          5. 
	ababcabc    ababcabc    ababcabc 
	    
	|||          |||          ||| 
	    
	abc          abc          abc 
	    
	(X)          (X)          (O) 
	*/ 
	 
	$str="ababcabc"; 
	$search="abc"; 
	 
	$strlen=strlen($str); 
	$searchlen=strlen($search); 
	 
	//1.遍历$str字符串 
	for($i=0;$i<$strlen;$i++){ 
	    if($i+$searchlen>$strlen){ 
	        echo &#39;超出长度&#39;;break; 
	    } 
	 
	    $match=true; 
	 
	     
	//2.遍历要搜索的字符串$search,进行对比 
	    for($j=0;$j<$searchlen;$j++){ 
	 
	        if($str[$i+$j]!=$search[$j]){ 
	            $match=false; 
	            break; 
	        } 
	        $k=$i+$j; 
	        if($match){ 
	            if($j==$searchlen-1){ 
	                echo "{$str}第{$i}个位置开始为{$search}\n";break; 
	            }//开源代码phprm.com 
	        } 
	 
	    } 
	 
	} 
	 
	

文章地址:

转载随意^^请带上本文地址!

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn