function filtrer_rediriger_images($reg) {
	$lien = $reg[1];
	
	if ( ! preg_match(",^http,", $lien)) {
		$code = substr(md5($lien), 0, 1);
		$code = hexdec($code) % 4;		
		$lien = "http://img$code.flip-zone.com/$lien";
	}
	return " src=\"$lien\"" ;
}

function filtrer_images_page($flux) {
	$flux = preg_replace_callback(",[[:space:]]src=[\"\']([^\"\']*)[\"\'],", "filtrer_rediriger_images", $flux );
	return $flux;
}