字符串匹配在php中非常常见,本文通过实例来讲解一下php中最简单的字符串匹配算法,希望初学php的同学通过本实例,对字符串匹配有所了解.
本文实例讲述了php中最简单的字符串匹配算法,具体实现方法如下:
<?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 '超出长度';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; } } } }
希望本文所述对大家的PHP程序设计有所帮助.

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