正则表达式匹配连续多个相同内容

$xx = '123334555667777';

//用到正向预言

$xxxx = preg_replace('/(\d)(?=\1)/is','',$xx);

//结果为变为$xxxx1234567

转载于:https://www.cnblogs.com/xuxyblog/p/6119314.html