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Home Backend Development PHP Tutorial PHP simple string filtering method example sharing

PHP simple string filtering method example sharing

墨辰丷
墨辰丷
Jun 01, 2018 pm 02:08 PM
php string Example

这篇文章主要介绍了PHP简单字符串过滤方法,结合实例形式分析了php通过对字符串中特殊字符进行正则替换实现字符过滤功能的简单操作技巧,需要的朋友可以参考下

具体如下：


<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1,maximum-scale=1, user-scalable=no">
<title>PHP字符串的过滤方法</title>
</head>
<body>
<?php
function strFilter($str){
  //特殊字符的过滤方法
  $str = str_replace(&#39;`&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;·&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;~&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;!&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;！&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;@&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;#&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;$&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;￥&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;%&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;^&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;……&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;&&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;*&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;(&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;)&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;（&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;）&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;-&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;_&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;——&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;+&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;=&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;|&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;\\&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;[&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;]&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;【&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;】&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;{&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;}&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;;&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;；&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;:&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;：&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;\&#39;&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;"&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;“&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;”&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;,&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;，&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;<&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;>&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;《&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;》&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;.&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;。&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;/&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;、&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;?&#39;, &#39;&#39;, $str);
  $str = str_replace(&#39;？&#39;, &#39;&#39;, $str);
  //防sql防注入代码的过滤方法
  $str = str_replace(&#39;and&#39;,&#39;&#39;,$str);
  $str = str_replace(&#39;execute&#39;,&#39;&#39;,$str);
  $str = str_replace(&#39;update&#39;,&#39;&#39;,$str);
  $str = str_replace(&#39;count&#39;,&#39;&#39;,$str);
  $str = str_replace(&#39;chr&#39;,&#39;&#39;,$str);
  $str = str_replace(&#39;mid&#39;,&#39;&#39;,$str);
  $str = str_replace(&#39;master&#39;,&#39;&#39;,$str);
  $str = str_replace(&#39;truncate&#39;,&#39;&#39;,$str);
  $str = str_replace(&#39;char&#39;,&#39;&#39;,$str);
  $str = str_replace(&#39;declare&#39;,&#39;&#39;,$str);
  $str = str_replace(&#39;select&#39;,&#39;&#39;,$str);
  $str = str_replace(&#39;create&#39;,&#39;&#39;,$str);
  $str = str_replace(&#39;delete&#39;,&#39;&#39;,$str);
  $str = str_replace(&#39;insert&#39;,&#39;&#39;,$str);
  $str = str_replace(&#39;or&#39;,&#39;&#39;,$str);
  return trim($str);
}
$cont = &#39;  ?”？;onestopweb.cn and update //\ as chaoyi 》、  &#39;;
echo &#39;开始[&#39;.strFilter($cont).&#39;]结束&#39;;
?>
</body>
</html>
Copy after login


效果图如下：


总结：以上就是本篇文的全部内容，希望能对大家的学习有所帮助。

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