常用正则表达式实例

1、选中被逗号(或其他符号)分割的字符串当中的某一个值

69,23,69,88,695,69,69,6,765769fd969690,3242,969,69

实例，选中以上字符串所有出现的69部分

(\b69\b[,]?)|([,]?\b69\b)

javascript

var val  = "69";
var exp  = new RegExp("(\\b"+val+"\\b[,]?)|([,]?\\b"+val+"\\b)","g");

php

$matches  =  array();
$search   =  ‘69,23,69,88,695,69,69,6,765769fd969690,3242,969,69‘;
$target   =  ‘69‘;
$pattern  =  ‘/(\b‘.$target.‘\b[,]?)|([,]?\b‘.$target.‘\b)/‘;
preg_match_all ($pattern, $search, $matches);