php字符串过滤与替换小结，php字符串小结

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:

<?php
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","
",$string);//---"//m.sbmmt.com/m/"为什么也转义了
}
//过滤字符串中的html标签
static public function strip_tags($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

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php字符串过滤与替换小结，php字符串小结_PHP教程

php字符串过滤与替换小结，php字符串小结