test.php

<?
// func.global callback
function getImagePath ($matches) {
	global $an;
	return $an[$matches[1]];
}
// func.global
function optimize($text, $img_domain, $an) {
	// ...
	$patt = '/\[img name\=\"([A-Za-z0-9._-]+)\"\]/';
	// ...
	$GLOBALS['an'] = &$an;
	// ...
	$result = preg_replace_callback($patt, 'getImagePath', $text);
	echo $result;
}
// ajax editcom
function ajax_editcom() {
	$url = "p.local"; // $c['title_url'];
	// ...
	$comment = '[img name="14066778417910.gif"] [img name="14066778411187.png"]';
	// get mysql comment by id
	$oldComment = '<div class="b-p b-p_type_image"><a href="http://p.local/images/big_size_comm/2014-07_6/14066778417910.gif"><img class="b-image" src="http://s4.p.local/images/previews_comm/2014-07_6/14066778417910.gif"></a></div><div class="b-p b-p_type_image"><a href="http://p.local/images/big_size_comm/2014-07_6/14066778411187.png"><img class="b-image" src="http://s4.p.local/images/previews_comm/2014-07_6/14066778411187.png"></a></div>';
	// ...
	$an = false;
	if (preg_match_all('/src="http:\/\/(s[1-9]\.'.$url.')([^"]*)"/Us', $oldComment, $matches)) {
	 	$an = array();
		$img_domain = $matches[1][0];
		foreach ($matches[2] as $path) {
			$an[basename($path)] = $path;
		}
	}
	// ...
	optimize($comment, $img_domain, &$an);
}
ajax_editcom();