<?php

	function permalink($string)
	{
		$permalink = '';

		$chars = array(
			'from' => array('ı', 'İ', 'ç', 'Ç', 'ğ', 'Ğ', 'ş', 'Ş', 'ü', 'Ü', 'ö', 'Ö'),
			'to' => array('i', 'I', 'c', 'C', 'g', 'G', 's', 'S', 'u', 'U', 'o', 'O')
		);

		$permalink = str_replace($chars['from'], $chars['to'], $string);
		$permalink = htmlspecialchars_decode($permalink, ENT_QUOTES);
		$permalink = preg_replace('%[^-/+|\w ]%', '', $permalink);
		$permalink = preg_replace('/[\/_|+ -]+/', '-', $permalink);
		$permalink = strtolower(trim($permalink, '-'));

		return $permalink;
	}

	$title = 'fıstıkçı şahap';

	echo permalink($title);