- preg_match: documentation ( source)
<?php
$url_liste = "http://www.kijiji.ca/b-autos-camions/grand-montreal/suv+vgm-bmw-x5-2001__2009/c174l80002a138a54a1000054a68?sort=priceAsc&price=2000.00__40000.00&kilometres=10000__110000";
$html_liste = "<td class=\"description\"><a href=\"/v-autos-camions/ville-de-montreal/2008-bmw-x5-suv/568081363\" class=\"title enable-search-navigation-flag\" name=\"568081363\">2008 BMW X5 SUV</a><p>";
$regexa = '/\<a(.*)\<\/a\>/';
preg_match($regexa, $html_liste, $matches);
echo $matches[1]; // 1234
$regexno = '/name="(\d+)"/';
$url_fiche = "href=\"/v-autos-camions/ville-de-montreal/2008-bmw-x5-suv/568081363\"";
preg_match($regexno, $url_fiche, $matches);
echo $matches[1];