/Framework/Common/String.php

<?php

/**

 * ??????

 * 

 * @version $Id: String.php 276 2012-01-17 09:42:32Z linsir123 $

 * @package Common

 */

class lpString

{

	/**

	 * [??]????

	 * 

	 * @param string $string ???????

	 * @return bool

	 * @static 

	 */

	static function isEmail($string)

	{

		$pattern = "/^([a-z0-9]+[\.\-_]?)*[a-z0-9]+@([a-z0-9]+[\.\-_]?)*[a-z0-9]+\.[a-z]{2,4}$/i";

		return preg_match($pattern, $string);

	}

	

	/**

	 * [??]utf-8??

	 * 

	 * @param string $string ???????

	 * @return bool

	 * @static 

	 */

	static function isUtf8($string)

	{

		return (utf8_encode(utf8_decode($string)) == $string);

	}

	

	/**

	 * [??]????

	 * 

	 * @param string $string ???????

	 * @return bool

	 * @static 

	 */

	static function isDatetime($string)

	{

		$pattern = "/^[0-9]{4}(\-|\/)[0-9]{1,2}(\\1)[0-9]{1,2}(|\s+[0-9]{1,2}(:[0-9]{1,2}){0,2})$/i";

		return preg_match($pattern, $string);

	}

	

	/**

	 * [??]?????

	 * 

	 * @param string $string ???????

	 * @param string $sep ??????

	 * @return bool

	 * @static 

	 */

	static function isDate($string, $sep = '-')

	{

		$parts = explode($sep, $string);

		if (count($parts) == 3) {

			if (checkdate(intval($parts[1]), intval($parts[2]), intval($parts[0]))) 

				return true;

		}

		

		return false;

	}

	

	/**

	 * ????????

	 * 

	 * @param string $string ???????

	 * @return string

	 * @static 

	 */

	static function trim($string)

	{

		return preg_replace("/\s/", '', trim($string));

	}

	

	/**

	 * ??????????

	 * 

	 * @param mixed $var ??????

	 * @param bool $force ??????

	 * @return mixed

	 * @static 

	 */

	static function addslashes($var, $force = false)

	{

		if ( ! get_magic_quotes_gpc() || $force) 

			$var = is_array($var) ?

				array_map(array('lpString', 'addslashes'), $var) :

				addslashes($var);

		

		return $var;

	}

	

	/**

	 * ??????????????

	 * 

	 * @param mixed $var ??????

	 * @return mixed

	 * @static 

	 */

	static function stripslashes($var)

	{

		$var = is_array($var) ?

			array_map(array('lpString', 'stripslashes'), $var) :

			stripslashes($var);

		

		return $var;

	}

	

	/**

	 * SQL??

	 * 

	 * @param mixed $var ??????

	 * @return mixed

	 * @static 

	 */

	static function dbQuote($var)

	{

		$var = is_array($var) ?

			array_map(array('lpString', 'dbQuote'), $var) :

			'`'.trim($var).'`';

		

		return $var;

	}

	

	/**

	 * ??SQL??

	 * 

	 * @param mixed $var ??????

	 * @return mixed

	 * @static 

	 */

	static function sqlEscape($var)

	{

		if (is_bool($var)) 

			$var = $var ? 1 : 0;

		elseif (is_null($var)) 

			$var = 'NULL';

		elseif (is_string($var))

			$var = "'".mysql_escape_string($var)."'";

		elseif (is_array($var))

			$var = array_map(array('lpString', 'sqlEscape'), $var);

			

		return $var;

	}

	

	/**

	 * ?????(???????????????UTF-8?????)

	 * 

	 * @param string $string ???????

	 * @param int $length ????,?????

	 * @param string $omission ??????????

	 * @param string $code ??

	 * @return string

	 * @static 

	 */

	static function substr($string, $length = 50, $omission = ' ...', $code = 'UTF-8')

	{

		$string = preg_replace("/\s/", ' ', strip_tags($string));

		$string = str_replace(array("&nbsp;"), array(""), $string);

		$string = htmlspecialchars_decode($string);

		if (empty($length) || strlen($string) <= $length) 

			return $string;

			

		///

		$byteLen = 0;

		$wordString = '';

		if (strtoupper($code) == 'UTF-8') {

			preg_match_all("/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/", $string, $words);

			$count = count($words[0]);

			for ($i = 0; $i < $count; $i++) {

				$wordString .= $words[0][$i];

				if (ord($words[0][$i]) >= 128) 

					$byteLen += 2;

				else

					$byteLen++;

				

				if ($byteLen >= $length) 

					return $wordString . $omission;

			}

		} else {

			$count = strlen($string);

			for ($i = 0; $i < $count; $i++) {

				if(ord(substr($string, $i, 1)) >= 128) {

					$byteLen += 2;

					$wordString .= substr($string, $i, 2);

					$i++;

				} else {

					$byteLen++;

					$wordString .= substr($string, $i, 1);

				}

				

				if ($byteLen >= $length) 

					return $wordString . $omission;

			}

		}

		

		return $string;

	}

	

	/**

	 * ?16???????RGB??

	 * // `Captcha.php`,`Image.php`?????

	 * 

	 * @param string $color ???(16??)

	 * @param string $defualt ?????(16??)

	 * @return array

	 * @static 

	 */

	static function hex2rgb($color, $defualt = 'ffffff')

    {

		$color = strtolower($color);

		if (substr($color, 0, 2) == '0x')

		    $color = substr($color, 2);

		elseif (substr($color, 0, 1) == '#')

		    $color = substr($color, 1);

		    

		///

		$l = strlen($color);

		if ($l == 3) {

		    $r = hexdec(substr($color, 0, 1));

		    $g = hexdec(substr($color, 1, 1));

		    $b = hexdec(substr($color, 2, 1));

		    

		    return array($r, $g, $b);

		} elseif ($l != 6) 

		    $color = $defualt;

		    

		///

		$r = hexdec(substr($color, 0, 2));

		$g = hexdec(substr($color, 2, 2));

		$b = hexdec(substr($color, 4, 2));

		return array($r, $g, $b);

    }

}