麻煩請(qǐng)問下為什么我這樣不行
<?php
$subject = "my email is spark@imooc.com";
//在這里補(bǔ)充代碼，實(shí)現(xiàn)正則匹配，并輸出郵箱地址
$mail='/my email is:([\w+@\w+\.\w+])/';
preg_match($mail,$subject,$matches);
echo $matches[1];
$subject = "my email is spark@imooc.com";
//在這里補(bǔ)充代碼，實(shí)現(xiàn)正則匹配，并輸出郵箱地址
$mail='/my email is:([\w+@\w+\.\w+])/';
preg_match($mail,$subject,$matches);
echo $matches[1];
2016-04-20
你的：$mail='/my email is:([\w+@\w+\.\w+])/';其中is后面不應(yīng)該有：，還有后面是查詢子集，把中括號(hào)去掉，
換成這樣就可以$mail='/my email is (\w+@\w+\.\w+)/';
2016-03-31
<?php
$subject = "my email is spark@imooc.com";
//在這里補(bǔ)充代碼，實(shí)現(xiàn)正則匹配，并輸出郵箱地址
$mail='/my email is \w+@\w+\.\w+/';
preg_match($mail,$subject,$matches);
var_dump($matches);