求一正则表达式

weijiepeng 2009-11-16 10:57:10

<br>ssss<img src="http://bbs.tg.com.cn/templates/uchome/images/logo/top_1_08.jpg" border="0"> <br>[attachimg]1213099[/attachimg]ssss[attachimg]1213099[/attachimg]
<img src="http://bbs.tg.com.cn/templates/uchome/images/logo/top_1_08.jpg" border="0">

取出第一次出现的图片地址 [attachimg]1213099[/attachimg]这个里面也是图片地址

...全文

73 4 打赏收藏转发到动态举报

写回复

用AI写文章

4 条回复

切换为时间正序

请发表友善的回复…

发表回复

江南昆虫 2009-11-16

打赏
举报

<pre>

<?php

$str = '<br>ssss <img src="http://bbs.tg.com.cn/templates/uchome/images/logo/top_1_08.jpg" border="0"> 

<br>[attachimg]1213099[/attachimg]ssss[attachimg]1213099[/attachimg] 

<br>[attachimg]1211234[/attachimg]ssss[attachimg]1211234[/attachimg] 

<img src="http://bbs.tg.com.cn/templates/uchome/images/logo/top_1_08.jpg" border="0"> 

';

preg_match_all('#(?:<img src=["\']?|\[attachimg])([^"\' >[]+)(?:\[/attachimg])?#',$str,$r);

$arr = array();

foreach ($r[1] as $v) {

	if (!in_array($v,$arr)) $arr[] = $v;

}

var_dump($arr);

?>

</pre>

weijiepeng 2009-11-16

打赏
举报

img src 里面也是图片地址啊

江南昆虫 2009-11-16

打赏
举报

<pre>

<?php

$str = '<br>ssss <img src="http://bbs.tg.com.cn/templates/uchome/images/logo/top_1_08.jpg" border="0"> <br>[attachimg]1213099[/attachimg]ssss[attachimg]1213099[/attachimg] 

<br>[attachimg]1211234[/attachimg]ssss[attachimg]1211234[/attachimg] 

<img src="http://bbs.tg.com.cn/templates/uchome/images/logo/top_1_08.jpg" border="0"> 

';

preg_match_all('#\[attachimg](\d*)\[/attachimg]#',$str,$r);

$arr = array();

foreach ($r[1] as $v) {

	if (!in_array($v,$arr)) $arr[] = $v;

}

var_dump($arr);

?>

</pre>

程序猿之殇 2009-11-16

打赏
举报

$str = <<<HTML

<br>ssss <img src="http://bbs.tg.com.cn/templates/uchome/images/logo/top_1_08.jpg" border="0"> <br>[attachimg]1213099[/attachimg]ssss[attachimg]1213099[/attachimg]

<img src="http://bbs.tg.com.cn/templates/uchome/images/logo/top_1_08.jpg" border="0"> 

HTML;

preg_match("/(\[attachimg\]\d+\[\/attachimg\])/ims", $str, $matches);

var_dump($matches[1]);