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PHP随机生成字符串

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Release: 2016-05-20 12:56:32
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PHP随机生成字符串

	/**
	 * 随机生成字符串
	 * @param int $length
	 * @return null|string
	 */
	private static function getRandChar($length = 8){
		$str = null;
		$strPol = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz";
		$max = strlen($strPol)-1;

		for($i=0;$i<$length;$i++){
	$str.=$strPol[rand(0,$max)]; //rand($min,$max)生成介于min和max两个数之间的一个随机整数
		}

		return $str;
	}
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