参数过滤类代码,PHP代码库,德仔网

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【PHP】参数过滤类
作者:qita.in / 发布于2012/10/22/ 512
参数过滤类
<div><?php</div>
<div>/**</div>
<div>* 参数过滤类</div>
<div>*</div>
<div>*/</div>
<div>class cls_string_filter</div>
<div>{</div>
<div>/**</div>
<div>* 将\n转化为<br/></div>
<div>*</div>
<div>* @param string $string 待转换的字符串</div>
<div>* @return string</div>
<div>*/</div>
<div>static public function nl2br($string)</div>
<div>{</div>
<div>return nl2br($string);</div>
<div>}
<div>/**</div>
<div>* 将<br/>转化为\n</div>
<div>*</div>
<div>* @param string $string 待转换的字符串</div>
<div>* @return string</div>
<div>*/</div>
<div>static public function br2nl($string)</div>
<div>{</div>
<div>$array = array('', '<br/>');</div>
<div>return str_replace($array, "\n", $string);</div>
<div>}
<div>/**</div>
<div>* 多个连续空格只保留一个</div>
<div>*</div>
<div>* @param string $string 待转换的字符串</div>
<div>* @return unknown</div>
<div>*/</div>
<div>static public function merge_spaces($string)</div>
<div>{</div>
<div>return preg_replace("/\s(?=\s)/","\\1", $string);</div>
<div>}
<div>/**</div>
<div>* 多个连续<br/>只保留一个</div>
<div>*</div>
<div>* @param string $string 待转换的字符串</div>
<div>* @return string</div>
<div>*/</div>
<div>static public function merge_brs($string)</div>
<div>{</div>
<div>return preg_replace("/((<br\/?>)+)/i", "<br/>", $string);</div>
<div>}
<div>/**</div>
<div>* 过滤字符串中的html标签</div>
<div>*</div>
<div>* @param string $string 待转换的字符串</div>
<div>* @return string</div>
<div>*/</div>
<div>static public function strip_tags($string)</div>
<div>{</div>
<div>return strip_tags($string);</div>
<div>}
<div>/**</div>
<div>* 将字符串转换为全小写</div>
<div>*</div>
<div>* @param string $string 待转换的字符串</div>
<div>* @return string</div>
<div>*/</div>
<div>static public function strtolower($string)</div>
<div>{</div>
<div>return strtolower($string);</div>
<div>}
<div>/**</div>
<div>* 将字符串转换为全大写</div>
<div>*</div>
<div>* @param string $string 待转换的字符串</div>
<div>* @return string</div>
<div>*/</div>
<div>static public function strtoupper($string)</div>
<div>{</div>
<div>return strtoupper($string);</div>
<div>}
<div>/**</div>
<div>* 过滤字符串中开头和结尾的特定字符</div>
<div>*</div>
<div>* @param string $string  待转换的字符串</div>
<div>* @param string $char_list 要转换的特定字符列表</div>
<div>* @return string</div>
<div>*/</div>
<div>static public function trim($string, $char_list='\\\\s')</div>
<div>{</div>
<div>$chars = preg_replace(</div>
<div>array( '/[\^\-\]\\\]/S', '/\\\{4}/S', '/\//'),</div>
<div>array( '\\\\\\0', '\\', '\/' ),</div>
<div>$char_list</div>
<div>);</div>
<div>$pattern = '^[' . $chars . ']*|[' . $chars . ']*</div>
<div>;</div>
<div>return preg_replace("/$pattern/sSD", '', $string);</div>
<div>}
<div>/**</div>
<div>* 过滤字符串中的回车换行</div>
<div>*</div>
<div>* @param string $string 待转换的字符串</div>
<div>* @return string</div>
<div>*/</div>
<div>static public function strip_new_lines($string)</div>
<div>{</div>
<div>return str_replace(array("\n", "\r"), '', $string);</div>
<div>}
<div>/**</div>
<div>* 过滤字符串中<script>脚本</div>
<div>*</div>
<div>* @param string $string 待过滤的字符串</div>
<div>* @return string</div>
<div>*/</div>
<div>static public function strip_script($string)</div>
<div>{</div>
<div>$reg = "/<script[^>]*?>.*?<\/script>/is";</div>
<div>return preg_replace($reg, '', $string);</div>
<div>}
<div>/**</div>
<div>* 过滤字符串中<style>脚本</div>
<div>*</div>
<div>* @param string $string 待过滤的字符串</div>
<div>* @return string</div>
<div>*/</div>
<div>static public function strip_style($string)</div>
<div>{</div>
<div>$reg = "/<style[^>]*?>.*?<\/style>/is";</div>
<div>return preg_replace($reg, '', $string);</div>
<div>}
<div>/**</div>
<div>* 过滤字符串中<link>脚本</div>
<div>*</div>
<div>* @param string $string 待过滤的字符串</div>
<div>* @return string</div>
<div>*/</div>
<div>static public function strip_link($string)</div>
<div>{</div>
<div>$reg = "/<link[^>]*?>.*?<\/link>/is";</div>
<div>return preg_replace($reg, '', $string);</div>
<div>}
<div>/**</div>
<div>* 过滤字符串中<iframe></div>
<div>*</div>
<div>* @param string $string 待过滤的字符串</div>
<div>* @return string</div>
<div>*/</div>
<div>static public function strip_iframe($string)</div>
<div>{</div>
<div>$reg = "/<iframe[^>]*?>.*?<\/iframe>/is";</div>
<div>return preg_replace($reg, '', $string);</div>
<div>}
<div>/**</div>
<div>* 过滤字符串中html危险代码</div>
<div>*</div>
<div>* @param string $string 待过滤的字符串</div>
<div>* @return string</div>
<div>*/</div>
<div>static public function strip_html_tags($string)</div>
<div>{</div>
<div>$reg = "/<(\/?)(script|iframe|style|html|body|title|link|meta|\?|\%)([^>]*?>)/is";</div>
<div>return preg_replace($reg, '', $string);</div>
<div>}
<div>}
<div>?></div>
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