How to replace a certain value in a link in php

php method to replace a certain value in the link: 1. Create a PHP sample file; 2. Replace the href attribute value in the a tag through the "function a_replace_href($str) {...}" method. Can.

The operating environment of this article: Windows7 system, PHP7.1 version, DELL G3 computer

How to replace the link in php a certain value?

php Replace the href attribute of the a tag in html

The data collected when imitating the site contains many a links that can jump to other sites, which can be replaced during collection Drop

<?php
// 替换a标签中的href属性值
function a_replace_href($str) {
  $preg = &#39;/href=(\"|\&#39;)(.*?)(\"|\&#39;)/i&#39;;
  $replacestr = &#39;href="#"&#39;;
  $res = preg_replace($preg, $replacestr, $str);
  return $res;
}
// 获取字符串中的所有a标签
function from_str_get_a($str){
    $preg = &#39;/<a .*?>/i&#39;;
    preg_match_all($preg, $str, $matchs);
    return $matchs[0];
}
$str = file_get_contents("index.html");
$data = from_str_get_a($str);//获取字符串中的a标签
$data1 = a_replace_href($data);//替换后应该显示的a标签
$res = $str;
// 反复对字符串进行查找替换
foreach ($data as $key => $value) {
    $res = str_replace($value,$data1[$key],$res,$i);
}
// 另存文件
file_put_contents("index1.html",$res);

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