使用preg_match匹配IMG标签的SRC属性 [英] Matching SRC attribute of IMG tag using preg_match

问题描述

我试图运行preg_match从文章的第一个IMG标签中提取SRC属性(在这种情况下，存储在$ row-> introtext中).

I'm attempting to run preg_match to extract the SRC attribute from the first IMG tag in an article (in this case, stored in $row->introtext).

preg_match('/\< *[img][^\>]*[src] *= *[\"\']{0,1}([^\"\']*)/i', $row->introtext, $matches);

没有得到类似的东西

images/stories/otakuzoku1.jpg

来自

<img src="images/stories/otakuzoku1.jpg" border="0" alt="Inside Otakuzoku's store" />

我得到了

0

正则表达式应该是正确的，但是我不能说出为什么它似乎与border属性而不是src属性匹配.

The regex should be right, but I can't tell why it appears to be matching the border attribute and not the src attribute.

或者，如果您耐心阅读了这篇文章，而又没有直接跳到回复字段并输入使用HTML/XML解析器"，那么可以推荐一本不错的教程，因为我很难找到一个完全适用于PHP 4.

Alternatively, if you've had the patience to read this far without skipping straight to the reply field and typing 'use a HTML/XML parser', can a good tutorial for one be recommended as I'm having trouble finding one at all that's applicable to PHP 4.

PHP 4.4.7

PHP 4.4.7

推荐答案

您的表达式不正确.试试:

Your expression is incorrect. Try:

preg_match('/< *img[^>]*src *= *["\']?([^"\']*)/i', $row->introtext, $matches);

请注意，删除了img和src周围的括号以及其他一些清除措施.

Note the removal of brackets around img and src and some other cleanups.

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