获取一个A标签的Href属性
被匹配的字符
<div class="a" herf="http://www.baidu.com/" id="a1">连接1</a>
<div class="a" herf='http://www.baidu.com/' id="a2">连接2</a>
<div class="a" herf=http://www.baidu.com/ id="a3">连接3</a>
可以没有引号 可以有双引号 单引号 但是不允许一侧有引号另一侧没有引号
- PHP code
preg_match('/<a([\s\S]*)href=(["\']?)([\s\S]*)\1\sid([\s\S]*)</a>/i', $str, $matches)这样怎么不行呢
------解决方案--------------------
- PHP code
$str=<<<STR<a class="a" href="http://www.baidu.com/" id="a1">连接1</a><a class="a" href='http://www.baidu.com/' id="a2">连接2</a><a class="a" href=http://www.baidu.com/ id="a3">连接3</a><a class="a" href="http://www.baidu.com/ id="a3">连接3</a>STR;preg_match_all('/<a[^>]+href=(["\']?)([^\s"\']+)\1[^>]*>/',$str,$matches);print_r($matches[2]);
------解决方案--------------------
- PHP code
$str=<<<html<div class="a" href="http://www.baidu.com/" id="a1">连接1</a><div class="a" href='http://www.baidu.com/' id="a2">连接2</a><div class="a" href=http://www.baidu.com/ id="a3">连接3</a>html;preg_match_all('/href=(["\'])?([^\s"\']+)/is', $str, $matches) ;print_r($matches);
------解决方案--------------------
- PHP code
[User:root Time:14:14:52 Path:/home/liangdong/php]$ php preg.php Array( [0] => Array ( [0] => <div class="a" href="http://www.baidu.com/" [1] => <div class="a" href='http://www.baidu.com/' [2] => <div class="a" href=http://www.baidu.com/ ) [1] => Array ( [0] => " [1] => ' [2] => ) [2] => Array ( [0] => http://www.baidu.com/ [1] => http://www.baidu.com/ [2] => http://www.baidu.com/ ))[User:root Time:14:14:53 Path:/home/liangdong/php]$ cat preg.php <?php$str = <<<EOF<div class="a" href="http://www.baidu.com/" id="a1">连接1</a><div class="a" href='http://www.baidu.com/' id="a2">连接2</a><div class="a" href=http://www.baidu.com/ id="a3">连接3</a>EOF;preg_match_all('/<div class="a" href=(["\']?)([^\s\'"]*)\1/is', $str, $matches);print_r($matches);?>