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首页 / 网页编程 / PHP / php数组一对一替换实现代码

复制代码 代码如下:
<?php
header("Content-type: text/html; charset=utf-8");
function multiple_replace_words($word,$replace,$string,$tmp_match="#a_a#"){
preg_match_all("/".$word."/",$string,$matches); //匹配所有关键词
$search = explode(",","/".implode("/,/",$matches[0])."/");
//不存在匹配关键词
if(empty($matches[0])) return false;
//特殊替换设置
$count = count($matches[0]);
foreach($replace as $key=>$val){
if(!isset($matches[0][$key])) unset($replace[$key]); //剔除越界替换
}
//合并特殊替换数组与匹配数组
for($i=0;$i<$count;$i++){
$matches[0][$i] = isset($replace[$i])? $replace[$i] : $matches[0][$i];
}
$replace = $matches[0];
//防止替换循环,也就是替换字符仍是被替换字符,此时将其临时替换一个特定字符$tmp_match
$replace = implode(",",$replace);
$replace = str_replace($word,$tmp_match,$replace); //临时替换匹配字符
$replace = explode(",",$replace);
//替换处理
$string = preg_replace($search,$replace,$string,1); //每次只替换数组中的一个
$string = str_replace($tmp_match,$word,$string); //还原临时替换的匹配字符
return $string;
}
//示例1
$string = "aaabaaacaaadaaa";
$word = "aaa";
$replace = array(null,"xxx","yyy");
echo "原文:".$string."<br/>输出:".multiple_replace_words($word,$replace,$string)."<br/><br/>";
//示例2
$string = "中文aaab中文ccaaad中文eee";
$word = "中文";
$replace = array(null,"(替换中文2)","(替换中文3)");
echo "原文:".$string."<br/>输出:".multiple_replace_words($word,$replace,$string);
/*
输出结果:
原文:aaabaaacaaadaaa
输出:aaabxxxcyyydaaa
原文:中文aaab中文ccaaad中文eee
输出:中文aaab(替换中文2)ccaaad(替换中文3)eee
//*/

作者:Zjmainstay