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php字符串过滤与替换小结

WBOY
WBOYOriginal
2016-06-06 20:12:22829browse

这篇文章主要介绍了php字符串过滤与替换,实例总结了php实现字符串过滤与替换的技巧,需要的朋友可以参考下

本文实例总结了php字符串过滤与替换的方法。分享给大家供大家参考。具体实现方法如下:

复制代码 代码如下:

class cls_string_filter{
 //将\n转化为
--囧,这有意思么?
 static public function nl2br($string){
  return nl2br($string);
 }
 //将
转化为\n
 static public function br2nl($string){
  $array = array('
','
');
  return str_replace($array,"\n",$string);//字符串替换
 }
 //多个空格只保留一个
 static public function merge_spaces($string){
  return preg_replace("/\s(?=\s)/","\\1",$string);//(?=pattern)举例:abc(?=kk)能匹配abckk,但不能匹配abcdd
 }
 //多个
只保留一个
 static public function merge_brs($string){
  return preg_replace("/((
)+)/i","
",$string);//---"http://www.jb51.net/"为什么也转义了
 }
 //过滤字符串中的html标签
 static public function strip_tags($string){
  return strip_tags($string);
 }
 //将字符串转换为小写--/--大写
 static public function strtolower($string){
  return strtolower($string);
 }
 static public function strtoupper($string){
  return strtoupper($string);
 }
 //过滤字符串开头与结尾的特定字符
 static public function trim($string,$char_list='\\\\s'){
  $find = array('/[\^\-\]\\\]/S','/\\\{4}/S','/\//');
  $replace = array('\\\\\\0','\\','\/');
  $char = preg_replace($fine,$replace,$char_list);
  $pattern = '^['.$chars.']*|['.$chars.']';
  return preg_replace("/$pattern/sSD",'',$string);
 }
 //过滤字符串中

希望本文所述对大家的php程序设计有所帮助。

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