Get the HREF(src) on an <img />

get_avatar_link.php

<?php
/**
 * Get the HREF value of an IMG
 *
 * @param $g_ava
 *
 * @return mixed
 */
function get_avatar_link($g_ava){
    if (is_string($g_ava)){
        preg_match("/src='(.*?)'/i", $g_ava, $matches);
        return $matches[1];
    }
    else
        return false;

}