Introduction to how to generate random strings in php

Using PHP to develop applications, especially website programs, often requires generating random passwords, and this article collects and sorts out methods for generating random strings

 generateRandomString( = 10 = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' = '' ( = 0;  < ; ++ .= [(0, () - 1 generateRandomString(20);

/**
 * 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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