正则表达式模式的简单问题

Question

please help me get the link and text from this tag. <h3 class="post-title entry-title"> has to be included because I want the links from that specific tag.

<h3 class="post-title entry-title">
<a href="http://mymplogk.blogspot.com/2011/03/h_25.html">Text</a>
</h3>

my work so far is

<?php

$string = file_get_contents('http://www.domain.com');

$regex_pattern = "";

unset($matches);
preg_match_all($regex_pattern, $string, $matches);


foreach ($matches[0] as $paragraph) {
echo $paragraph;
echo "<br>";
}
?> 

Thank you in advance

Answer 1

Following your example, this regex will find "http://mymplogk.blogspot.com/2011/03/h_25.html" and "Text":

$regex_pattern = '/<h3[^>]+class\s*=\s*[\'"]post-title entry-title[\'"][^>]*>.*?<a[^>]+href\s*=\s*"([^"]+)"[^>]*>([^<]*)</s';

This matches single or double quotes around the h3 tag, and allows additional attributes in h3 tag and optional whitespace between attributes and values. It also matches multiple times in $string, e.g.

$string = '<h3 class="post-title entry-title">
<a href="http://mymplogk.blogspot.com/2011/03/h_25.html">Text</a>
</h3>
<p>doot</p>
<h3 class=\'post-title entry-title\'>
<a href="http://www.google.com/">More Text</a>
</h3>';