php 保险过滤函数代码-PHP-Tutorial-php.cn

php 安全过滤函数代码

php 安全过滤函数代码，防止用户恶意输入内容。

<span style="color: #008000;">//</span><span style="color: #008000;">安全过滤输入[jb]</span>function check_str($<span style="color: #0000ff;">string</span>, $isurl = <span style="color: #0000ff;">false</span><span style="color: #000000;">){$</span><span style="color: #0000ff;">string</span> = preg_replace(<span style="color: #800000;">'</span><span style="color: #800000;">/[\\x00-\\x08\\x0B\\x0C\\x0E-\\x1F]/</span><span style="color: #800000;">'</span>,<span style="color: #800000;">''</span>,$<span style="color: #0000ff;">string</span><span style="color: #000000;">);$</span><span style="color: #0000ff;">string</span> = str_replace(array(<span style="color: #800000;">"</span><span style="color: #800000;">\0</span><span style="color: #800000;">"</span>,<span style="color: #800000;">"</span><span style="color: #800000;">%00</span><span style="color: #800000;">"</span>,<span style="color: #800000;">"</span><span style="color: #800000;">\r</span><span style="color: #800000;">"</span>),<span style="color: #800000;">''</span>,$<span style="color: #0000ff;">string</span><span style="color: #000000;">);empty($isurl) </span>&& $<span style="color: #0000ff;">string</span> = preg_replace(<span style="color: #800000;">"</span><span style="color: #800000;">/&(?!(#[0-9]+|[a-z]+);)/si</span><span style="color: #800000;">"</span>,<span style="color: #800000;">'</span><span style="color: #800000;">&</span><span style="color: #800000;">'</span>,$<span style="color: #0000ff;">string</span><span style="color: #000000;">);$</span><span style="color: #0000ff;">string</span> = str_replace(array(<span style="color: #800000;">"</span><span style="color: #800000;">%3C</span><span style="color: #800000;">"</span>,<span style="color: #800000;">'</span><span style="color: #800000;"><span style="color: #800000;">'</span>),<span style="color: #800000;">'</span><span style="color: #800000;"><span style="color: #800000;">'</span>,$<span style="color: #0000ff;">string</span><span style="color: #000000;">);$</span><span style="color: #0000ff;">string</span> = str_replace(array(<span style="color: #800000;">"</span><span style="color: #800000;">%3E</span><span style="color: #800000;">"</span>,<span style="color: #800000;">'</span><span style="color: #800000;">></span><span style="color: #800000;">'</span>),<span style="color: #800000;">'</span><span style="color: #800000;">></span><span style="color: #800000;">'</span>,$<span style="color: #0000ff;">string</span><span style="color: #000000;">);$</span><span style="color: #0000ff;">string</span> = str_replace(array(<span style="color: #800000;">'</span><span style="color: #800000;">"</span><span style="color: #800000;">'</span>,<span style="color: #800000;">"</span><span style="color: #800000;">'</span><span style="color: #800000;">"</span>,<span style="color: #800000;">"</span><span style="color: #800000;">\t</span><span style="color: #800000;">"</span>,<span style="color: #800000;">'</span> <span style="color: #800000;">'</span>),array(<span style="color: #800000;">'</span><span style="color: #800000;">“</span><span style="color: #800000;">'</span>,<span style="color: #800000;">'</span><span style="color: #800000;">‘</span><span style="color: #800000;">'</span>,<span style="color: #800000;">'</span> <span style="color: #800000;">'</span>,<span style="color: #800000;">'</span> <span style="color: #800000;">'</span>),$<span style="color: #0000ff;">string</span><span style="color: #000000;">);</span><span style="color: #0000ff;">return</span> trim($<span style="color: #0000ff;">string</span><span style="color: #000000;">);}</span></span></span>

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下面是整理的一些过滤函数：

<span style="color: #008000;">/*</span><span style="color: #008000;">** 安全过滤类-过滤javascript,css,iframes,object等不安全参数 过滤级别高*  Controller中使用方法：$this->controller->fliter_script($value)* @param  string $value 需要过滤的值* @return string</span><span style="color: #008000;">*/</span><span style="color: #000000;">function fliter_script($value) {$value </span>= preg_replace(<span style="color: #800000;">"</span><span style="color: #800000;">/(javascript:)?on(click|load|key|mouse|error|abort|move|unload|change|dblclick|move|reset|resize|submit)/i</span><span style="color: #800000;">"</span>,<span style="color: #800000;">"</span><span style="color: #800000;">&111n\\2</span><span style="color: #800000;">"</span><span style="color: #000000;">,$value);$value </span>= preg_replace(<span style="color: #800000;">"</span><span style="color: #800000;">/(.*?)/si</span><span style="color: #800000;">"</span>,<span style="color: #800000;">""</span><span style="color: #000000;">,$value);$value </span>= preg_replace(<span style="color: #800000;">"</span><span style="color: #800000;">/(.*?)/si</span><span style="color: #800000;">"</span>,<span style="color: #800000;">""</span><span style="color: #000000;">,$value);$value </span>= preg_replace (<span style="color: #800000;">"</span><span style="color: #800000;">//iesU</span><span style="color: #800000;">"</span>, <span style="color: #800000;">''</span><span style="color: #000000;">, $value);</span><span style="color: #0000ff;">return</span><span style="color: #000000;"> $value;}</span><span style="color: #008000;">/*</span><span style="color: #008000;">** 安全过滤类-过滤HTML标签*  Controller中使用方法：$this->controller->fliter_html($value)* @param  string $value 需要过滤的值* @return string</span><span style="color: #008000;">*/</span><span style="color: #000000;">function fliter_html($value) {</span><span style="color: #0000ff;">if</span> (function_exists(<span style="color: #800000;">'</span><span style="color: #800000;">htmlspecialchars</span><span style="color: #800000;">'</span>)) <span style="color: #0000ff;">return</span><span style="color: #000000;"> htmlspecialchars($value);</span><span style="color: #0000ff;">return</span> str_replace(array(<span style="color: #800000;">"</span><span style="color: #800000;">&</span><span style="color: #800000;">"</span>, <span style="color: #800000;">'</span><span style="color: #800000;">"</span><span style="color: #800000;">'</span>, <span style="color: #800000;">"</span><span style="color: #800000;">'</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;"><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">></span><span style="color: #800000;">"</span>), array(<span style="color: #800000;">"</span><span style="color: #800000;">&</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">\"</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">'</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;"><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">></span><span style="color: #800000;">"</span><span style="color: #000000;">), $value);}</span><span style="color: #008000;">/*</span><span style="color: #008000;">** 安全过滤类-对进入的数据加下划线 防止SQL注入*  Controller中使用方法：$this->controller->fliter_sql($value)* @param  string $value 需要过滤的值* @return string</span><span style="color: #008000;">*/</span><span style="color: #000000;">function fliter_sql($value) {$sql </span>= array(<span style="color: #800000;">"</span><span style="color: #800000;">select</span><span style="color: #800000;">"</span>, <span style="color: #800000;">'</span><span style="color: #800000;">insert</span><span style="color: #800000;">'</span>, <span style="color: #800000;">"</span><span style="color: #800000;">update</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">delete</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">\'</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">\/\*</span><span style="color: #800000;">"</span><span style="color: #000000;">,     </span><span style="color: #800000;">"</span><span style="color: #800000;">\.\.\/</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">\.\/</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">union</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">into</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">load_file</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">outfile</span><span style="color: #800000;">"</span><span style="color: #000000;">);$sql_re </span>= array(<span style="color: #800000;">""</span>,<span style="color: #800000;">""</span>,<span style="color: #800000;">""</span>,<span style="color: #800000;">""</span>,<span style="color: #800000;">""</span>,<span style="color: #800000;">""</span>,<span style="color: #800000;">""</span>,<span style="color: #800000;">""</span>,<span style="color: #800000;">""</span>,<span style="color: #800000;">""</span>,<span style="color: #800000;">""</span>,<span style="color: #800000;">""</span><span style="color: #000000;">);</span><span style="color: #0000ff;">return</span><span style="color: #000000;"> str_replace($sql, $sql_re, $value);}</span><span style="color: #008000;">/*</span><span style="color: #008000;">** 安全过滤类-通用数据过滤*  Controller中使用方法：$this->controller->fliter_escape($value)* @param string $value 需要过滤的变量* @return string|array</span><span style="color: #008000;">*/</span><span style="color: #000000;">function fliter_escape($value) {</span><span style="color: #0000ff;">if</span><span style="color: #000000;"> (is_array($value)) {  </span><span style="color: #0000ff;">foreach</span> ($value <span style="color: #0000ff;">as</span> $k =><span style="color: #000000;"> $v) {   $value[$k] </span>=<span style="color: #000000;"> self::fliter_str($v);  }} </span><span style="color: #0000ff;">else</span><span style="color: #000000;"> {  $value </span>=<span style="color: #000000;"> self::fliter_str($value);}</span><span style="color: #0000ff;">return</span><span style="color: #000000;"> $value;}</span><span style="color: #008000;">/*</span><span style="color: #008000;">** 安全过滤类-字符串过滤 过滤特殊有危害字符*  Controller中使用方法：$this->controller->fliter_str($value)* @param  string $value 需要过滤的值* @return string</span><span style="color: #008000;">*/</span><span style="color: #000000;">function fliter_str($value) {$badstr </span>= array(<span style="color: #800000;">"</span><span style="color: #800000;">\0</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">%00</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">\r</span><span style="color: #800000;">"</span>, <span style="color: #800000;">'</span><span style="color: #800000;">&</span><span style="color: #800000;">'</span>, <span style="color: #800000;">'</span> <span style="color: #800000;">'</span>, <span style="color: #800000;">'</span><span style="color: #800000;">"</span><span style="color: #800000;">'</span>, <span style="color: #800000;">"</span><span style="color: #800000;">'</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;"><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">></span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span>   <span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">%3C</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">%3E</span><span style="color: #800000;">"</span><span style="color: #000000;">);$newstr </span>= array(<span style="color: #800000;">''</span>, <span style="color: #800000;">''</span>, <span style="color: #800000;">''</span>, <span style="color: #800000;">'</span><span style="color: #800000;">&</span><span style="color: #800000;">'</span>, <span style="color: #800000;">'</span> <span style="color: #800000;">'</span>, <span style="color: #800000;">'</span><span style="color: #800000;">"</span><span style="color: #800000;">'</span>, <span style="color: #800000;">'''</span><span style="color: #800000;">, "", "   ", "");</span>$value  =<span style="color: #000000;"> str_replace($badstr, $newstr, $value);$value  </span>= preg_replace(<span style="color: #800000;">'</span><span style="color: #800000;">/&((#(\d{3,5}|x[a-fA-F0-9]{4}));)/</span><span style="color: #800000;">'</span>, <span style="color: #800000;">'</span><span style="color: #800000;">&\\1</span><span style="color: #800000;">'</span><span style="color: #000000;">, $value);</span><span style="color: #0000ff;">return</span><span style="color: #000000;"> $value;}</span><span style="color: #008000;">/*</span><span style="color: #008000;">** 私有路劲安全转化*  Controller中使用方法：$this->controller->filter_dir($fileName)* @param string $fileName* @return string</span><span style="color: #008000;">*/</span><span style="color: #000000;">function filter_dir($fileName) {$tmpname </span>=<span style="color: #000000;"> strtolower($fileName);$temp </span>= array(<span style="color: #800000;">'</span><span style="color: #800000;">:/</span><span style="color: #800000;">'</span>,<span style="color: #800000;">"</span><span style="color: #800000;">\0</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">..</span><span style="color: #800000;">"</span><span style="color: #000000;">);</span><span style="color: #0000ff;">if</span> (str_replace($temp, <span style="color: #800000;">''</span>, $tmpname) !==<span style="color: #000000;"> $tmpname) {  </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">false</span><span style="color: #000000;">;}</span><span style="color: #0000ff;">return</span><span style="color: #000000;"> $fileName;}</span><span style="color: #008000;">/*</span><span style="color: #008000;">** 过滤目录*  Controller中使用方法：$this->controller->filter_path($path)* @param string $path* @return array</span><span style="color: #008000;">*/</span><span style="color: #0000ff;">public</span><span style="color: #000000;"> function filter_path($path) {$path </span>= str_replace(array(<span style="color: #800000;">"</span><span style="color: #800000;">'</span><span style="color: #800000;">"</span>,<span style="color: #800000;">'</span><span style="color: #800000;">#</span><span style="color: #800000;">'</span>,<span style="color: #800000;">'</span><span style="color: #800000;">=</span><span style="color: #800000;">'</span>,<span style="color: #800000;">'</span><span style="color: #800000;">`</span><span style="color: #800000;">'</span>,<span style="color: #800000;">'</span><span style="color: #800000;">$</span><span style="color: #800000;">'</span>,<span style="color: #800000;">'</span><span style="color: #800000;">%</span><span style="color: #800000;">'</span>,<span style="color: #800000;">'</span><span style="color: #800000;">&</span><span style="color: #800000;">'</span>,<span style="color: #800000;">'</span><span style="color: #800000;">;</span><span style="color: #800000;">'</span>), <span style="color: #800000;">''</span><span style="color: #000000;">, $path);</span><span style="color: #0000ff;">return</span> rtrim(preg_replace(<span style="color: #800000;">'</span><span style="color: #800000;">/(\/){2,}|(\\\){1,}/</span><span style="color: #800000;">'</span>, <span style="color: #800000;">'</span><span style="color: #800000;">/</span><span style="color: #800000;">'</span>, $path), <span style="color: #800000;">'</span><span style="color: #800000;">/</span><span style="color: #800000;">'</span><span style="color: #000000;">);}</span><span style="color: #008000;">/*</span><span style="color: #008000;">** 过滤PHP标签*  Controller中使用方法：$this->controller->filter_phptag($string)* @param string $string* @return string</span><span style="color: #008000;">*/</span><span style="color: #0000ff;">public</span> function filter_phptag($<span style="color: #0000ff;">string</span><span style="color: #000000;">) {</span><span style="color: #0000ff;">return</span> str_replace(array(<span style="color: #800000;">''</span>), array(<span style="color: #800000;">'</span><span style="color: #800000;"></span><span style="color: #800000;">'</span>, <span style="color: #800000;">'</span><span style="color: #800000;">?></span><span style="color: #800000;">'</span>), $<span style="color: #0000ff;">string</span><span style="color: #000000;">);}</span><span style="color: #008000;">/*</span><span style="color: #008000;">** 安全过滤类-返回函数*  Controller中使用方法：$this->controller->str_out($value)* @param  string $value 需要过滤的值* @return string</span><span style="color: #008000;">*/</span><span style="color: #0000ff;">public</span><span style="color: #000000;"> function str_out($value) {$badstr </span>= array(<span style="color: #800000;">"</span><span style="color: #800000;"><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">></span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">%3C</span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">%3E</span><span style="color: #800000;">"</span><span style="color: #000000;">);$newstr </span>= array(<span style="color: #800000;">"</span><span style="color: #800000;"><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">></span><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;"><span style="color: #800000;">"</span>, <span style="color: #800000;">"</span><span style="color: #800000;">></span><span style="color: #800000;">"</span><span style="color: #000000;">);$value  </span>=<span style="color: #000000;"> str_replace($newstr, $badstr, $value);</span><span style="color: #0000ff;">return</span> stripslashes($value); <span style="color: #008000;">//</span><span style="color: #008000;">下划线</span>}</span></span></span></span></span></span>

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