- preg_match: documentation ( source)
- print_r: documentation ( source)
- preg_match_all: documentation ( source)
<?php
// 1. Identify the block of <a> elements
$string = '<div><a href=%http://link1%><img></a><a href=%http://link2%><img></a><a href=%http://link3%><img></a></div>';
$re = '|<div>((<a((?!href)(?!<).)+?href=%([^%]+?)%((?!</a>).)+?</a>){3})</div>|';
$matches = array();
echo('result='.intval(preg_match($re, $string, $matches))."\n");
echo('$matches='); print_r($matches);
/*
// 2. Split it into individual <a> elements
$re = '|(?<=</a>)(?=<a)|';
$pieces = preg_split($re, $matches[1]);
echo('$pieces='); print_r($pieces);
// 3. Analyze each <a> element, extract the interesting components
$re = '|href=%([^%]*)%|';
foreach ($pieces as $a) {
$matches = array();
if (preg_match($re, $a, $matches)) {
echo($a.': '.$matches[1]."\n");
}
}
*/
$re = '|<a((?!href)(?!<).)+?href=%([^%]+?)%((?!</a>).)+?</a>|';
preg_match_all($re, $matches[1], $matches);
print_r($matches);