strstr 字符串的首次出现

[TOC] ## 实例 ### 查找匹配前的字符串 ``` $email = 'name@example.com'; $domain = strstr($email, '@'); echo $domain; // 打印 @example.com $user = strstr($email, '@', true); echo $user; // 打印 name ``` >[] 啊算大厦多