Türkçe karakter sorunu

mrb arkadaşlar bi arama motoru üzerinde çalışıyorum

arama motoru örümcekle çalışıyor sitenin içeriğini örümcekler çekiyor

fakat indexlediği siteler türkçe karakter sorunu oluyor

Arkadaşlar yardımcı olursanız çok makbule geçer

Bu kodla alakalı bişeymi arkadaşlar

function get_links($file, $url, $can_leave_domain, $base) {

	$chunklist = array ();
    // The base URL comes from either the meta tag or the current URL.
    if (!empty($base)) {
        $url = $base;
    }

	$links = array ();
	$regs = Array ();
	$checked_urls = Array();

	preg_match_all("/href\s*=\s*[\'\"]?([+:%\/\?~=&;\\\(\),._a-zA-Z0-9-]*)(#[.a-zA-Z0-9-]*)?[\'\" ]?(\s*rel\s*=\s*[\'\"]?(nofollow)[\'\"]?)?/i", $file, $regs, PREG_SET_ORDER);
	foreach ($regs as $val) {
		if ($checked_urls[$val[1]]!=1 && !isset ($val[4])) { //if nofollow is not set
			if (($a = $this->url_purify($val[1], $url, $can_leave_domain)) != '') {
				$links[] = $a;
			}
			$checked_urls[$val[1]] = 1;
		}
	}
	preg_match_all("/(frame[^>]*src[[:blank:]]*)=[[:blank:]]*[\'\"]?(([[a-z]{3,5}:\/\/(([.a-zA-Z0-9-])+(:[0-9]+)*))*([+:%\/?=&;\\\(\),._ a-zA-Z0-9-]*))(#[.a-zA-Z0-9-]*)?[\'\" ]?/i", $file, $regs, PREG_SET_ORDER);
	foreach ($regs as $val) {
		if ($checked_urls[$val[1]]!=1 && !isset ($val[4])) { //if nofollow is not set
			if (($a = url_purify($val[1], $url, $can_leave_domain)) != '') {
				$links[] = $a;
			}
			$checked_urls[$val[1]] = 1;
		}
	}
	preg_match_all("/(window[.]location)[[:blank:]]*=[[:blank:]]*[\'\"]?(([[a-z]{3,5}:\/\/(([.a-zA-Z0-9-])+(:[0-9]+)*))*([+:%\/?=&;\\\(\),._ a-zA-Z0-9-]*))(#[.a-zA-Z0-9-]*)?[\'\" ]?/i", $file, $regs, PREG_SET_ORDER);
	foreach ($regs as $val) {
		if ($checked_urls[$val[1]]!=1 && !isset ($val[4])) { //if nofollow is not set
			if (($a = url_purify($val[1], $url, $can_leave_domain)) != '') {
				$links[] = $a;
			}
			$checked_urls[$val[1]] = 1;
		}
	}
	preg_match_all("/(http-equiv=['\"]refresh['\"] *content=['\"][0-9]+;url)[[:blank:]]*=[[:blank:]]*[\'\"]?(([[a-z]{3,5}:\/\/(([.a-zA-Z0-9-])+(:[0-9]+)*))*([+:%\/?=&;\\\(\),._ a-zA-Z0-9-]*))(#[.a-zA-Z0-9-]*)?[\'\" ]?/i", $file, $regs, PREG_SET_ORDER);
	foreach ($regs as $val) {
		if ($checked_urls[$val[1]]!=1 && !isset ($val[4])) { //if nofollow is not set
			if (($a = url_purify($val[1], $url, $can_leave_domain)) != '') {
				$links[] = $a;
			}
			$checked_urls[$val[1]] = 1;
		}
	}

	preg_match_all("/(window[.]open[[:blank:]]*[(])[[:blank:]]*[\'\"]?(([[a-z]{3,5}:\/\/(([.a-zA-Z0-9-])+(:[0-9]+)*))*([+:%\/?=&;\\\(\),._ a-zA-Z0-9-]*))(#[.a-zA-Z0-9-]*)?[\'\" ]?/i", $file, $regs, PREG_SET_ORDER);
	foreach ($regs as $val) {
		if ($checked_urls[$val[1]]!=1 && !isset ($val[4])) { //if nofollow is not set
			if (($a = url_purify($val[1], $url, $can_leave_domain)) != '') {
				$links[] = $a;
			}
			$checked_urls[$val[1]] = 1;
		}
	}