if ($results['status'] == 'Active') {

Kodlarınız

}

<?php 

if (!file_exists( dirname( __FILE__ ) . DIRECTORY_SEPARATOR . 'lisans.php' )) {
		exit( 'lisans.php dosyası bulunamadı. (' . php_sapi_name(  ) . ')' . ( dirname( __FILE__ ) . DIRECTORY_SEPARATOR . 'lisans.php' ) );
	}

	require( dirname( __FILE__ ) . DIRECTORY_SEPARATOR . 'lisans.php' );
	$licensekey = $whmcs_licensekey;
	$localkey = whmcs_getlocalkey(  );
	$whmcsurl = 'http://www.domainadi.com';
	$licensing_secret_key = '123456789asd';
	$check_token = time(  ) . md5( mt_rand( 1000000000, 9999999999 ) . $licensekey );
	$checkdate = date( 'Ymd' );
	$usersip = (isset( $_SERVER['SERVER_ADDR'] ) ? $_SERVER['SERVER_ADDR'] : $_SERVER['LOCAL_ADDR']);
	$localkeydays = 1;
	$allowcheckfaildays = 1;
	$localkeyvalid = false;

	if ($localkey) {
		$localkey = str_replace( '', '', $localkey );
		$localdata = substr( $localkey, 0, strlen( $localkey ) - 32 );
		$md5hash = substr( $localkey, strlen( $localkey ) - 32 );

		if ($md5hash == md5( $localdata . $licensing_secret_key )) {
			$localdata = strrev( $localdata );
			$md5hash = substr( $localdata, 0, 32 );
			$localdata = substr( $localdata, 32 );
			$localdata = base64_decode( $localdata );
			$localkeyresults = unserialize( $localdata );
			$originalcheckdate = $localkeyresults['checkdate'];

			if ($md5hash == md5( $originalcheckdate . $licensing_secret_key )) {
				$localexpiry = date( 'Ymd', mktime( 0, 0, 0, date( 'm' ), date( 'd' ) - $localkeydays, date( 'Y' ) ) );

				if ($localexpiry < $originalcheckdate) {
					$localkeyvalid = true;
					$results = $localkeyresults;
					$validdomains = explode( ',', $results['validdomain'] );

					if (!in_array( $_SERVER['SERVER_NAME'], $validdomains )) {
						$localkeyvalid = false;
						$localkeyresults['status'] = 'Invalid';
						$results = array(  );
					}

					$validips = explode( ',', $results['validip'] );

					if (!in_array( $usersip, $validips )) {
						$localkeyvalid = false;
						$localkeyresults['status'] = 'Invalid';
						$results = array(  );
					}


					if ($results['validdirectory'] != dirname( __FILE__ )) {
						$localkeyvalid = false;
						$localkeyresults['status'] = 'Invalid';
						$results = array(  );
					}
				}
			}
		}
	}


	if (!$localkeyvalid) {
		$postfields['licensekey'] = $licensekey;
		$postfields['domain'] = $_SERVER['SERVER_NAME'];
		$postfields['ip'] = $usersip;
		$postfields['dir'] = dirname( __FILE__ );

		if ($check_token) {
			$postfields['check_token'] = $check_token;
		}


		if (function_exists( 'curl_exec' )) {
			$ch = curl_init(  );
			curl_setopt( $ch, CURLOPT_URL, $whmcsurl . 'modules/servers/licensing/verify.php' );
			curl_setopt( $ch, CURLOPT_POST, 1 );
			curl_setopt( $ch, CURLOPT_POSTFIELDS, $postfields );
			curl_setopt( $ch, CURLOPT_TIMEOUT, 30 );
			curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 );
			$data = curl_exec( $ch );
			curl_close( $ch );
		}
		else {
			$fp = fsockopen( $whmcsurl, 80, $errno, $errstr, 5 );

			if ($fp) {
				$querystring = '';
				foreach ($postfields as $k => $v) {
					$querystring .= '' . $k . '=' . urlencode( $v ) . '&';
				}

				$header = 'POST ' . $whmcsurl . 'modules/servers/licensing/verify.php HTTP/1.0
';
				$header .= 'Host: ' . $whmcsurl . '
';
				$header .= 'Content-type: application/x-www-form-urlencoded
';
				$header .= 'Content-length: ' . @strlen( $querystring ) . '
';
				$header .= 'Connection: close

';
				$header .= $querystring;
				$data = '';
				@stream_set_timeout( $fp, 20 );
				@fputs( $fp, $header );
				$status = @socket_get_status( $fp );

				while (( !@feof( $fp ) && $status )) {
					$data .= @fgets( $fp, 1024 );
					$status = @socket_get_status( $fp );
				}

				@fclose( $fp );
			}
		}


		if (!$data) {
			$localexpiry = date( 'Ymd', mktime( 0, 0, 0, date( 'm' ), date( 'd' ) - ( $localkeydays + $allowcheckfaildays ), date( 'Y' ) ) );

			if ($localexpiry < $originalcheckdate) {
				$results = $localkeyresults;
			}
			else {
				$results['status'] = 'Invalid';
				$results['description'] = 'Remote Check Failed';
				$lerror = 'License Invalid: ' . $results['description'];
				return false;
			}
		}

		preg_match_all( '/<(.*?)>([^<]+)<\/\1>/i', $data, $matches );
		$results = array(  );
		foreach ($matches[1] as $k => $v) {
			$results[$v] = $matches[2][$k];
		}


		if ($results['md5hash']) {
			if ($results['md5hash'] != md5( $licensing_secret_key . $check_token )) {
				$results['status'] = 'Invalid';
				$results['description'] = 'MD5 Checksum Verification Failed';
				$lerror = 'License Invalid: ' . $results['description'];
				return false;
			}
		}


		if ($results['status'] == 'Active') {
			$results['checkdate'] = $checkdate;
			$data_encoded = serialize( $results );
			$data_encoded = base64_encode( $data_encoded );
			$data_encoded = md5( $checkdate . $licensing_secret_key ) . $data_encoded;
			$data_encoded = strrev( $data_encoded );
			$data_encoded = $data_encoded . md5( $data_encoded . $licensing_secret_key );
			$data_encoded = wordwrap( $data_encoded, 80, '', true );
			$results['localkey'] = $data_encoded;
		}

		$results['remotecheck'] = true;
	}

	unset( $postfields );
	unset( $data );
	unset( $matches );
	unset( $whmcsurl );
	unset( $licensing_secret_key );
	unset( $checkdate );
	unset( $usersip );
	unset( $localkeydays );
	unset( $allowcheckfaildays );
	unset( $md5hash );

	if (( isset( $results['localkey'] ) && $results['localkey'] != '' )) {
		whmcs_savelocalkey( $results['localkey'] );
	}


	if ($results['status'] == 'Active') {
		return true;
	}


	if ($results['status'] == 'Invalid') {
		$lerror = 'Lisansınız Geçersiz.';
		return null;
	}


	if ($results['status'] == 'Expired') {
		$lerror = 'Lisans Süreniz Doldu.';
		return null;
	}


	if ($results['status'] == 'Suspended') {
		$lerror = 'Lisansınız Askıya Alındı.';
		return null;
	}

<?php
$whmcs_licensekey="xxxxxxxxxxxxxxxxxxxx";

?>