How to get any four strings in php

How to get any four strings in php

1. First, we write a getRandomStr function, Pass in two parameters, the first parameter is the length of the generated string, and the second parameter is whether special characters are required.

<?php
/**
 * 获得随机字符串
 * @param $len             需要的长度
 * @param $special        是否需要特殊符号
 * @return string       返回随机字符串
 */
function getRandomStr($len, $special=true){
    $chars = array(
        "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k",
        "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v",
        "w", "x", "y", "z", "A", "B", "C", "D", "E", "F", "G",
        "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R",
        "S", "T", "U", "V", "W", "X", "Y", "Z", "0", "1", "2",
        "3", "4", "5", "6", "7", "8", "9"
    );
    if($special){
        $chars = array_merge($chars, array(
            "!", "@", "#", "$", "?", "|", "{", "/", ":", ";",
            "%", "^", "&", "*", "(", ")", "-", "_", "[", "]",
            "}", "<", ">", "~", "+", "=", ",", "."
        ));
    }
    $charsLen = count($chars) - 1;
    shuffle($chars);                            //打乱数组顺序
    $str = &#39;&#39;;
    for($i=0; $i<$len; $i++){
        $str .= $chars[mt_rand(0, $charsLen)];    //随机取出一位
    }
    return $str;
}

2. Then we call the getRandomStr function 4 times and print it.

echo getRandomStr(8, false) , &#39;<br>&#39;;
echo getRandomStr(8, false) , &#39;<br>&#39;;
echo getRandomStr(8, false) , &#39;<br>&#39;;
echo getRandomStr(8, false) , &#39;<br>&#39;;

Effect: (Here I generated 4 8-bit strings, excluding special characters)

GRbgpepX
4thOLZln
hkBoGY1Q
G9DROwtd

3. We can also save it through an array Results generated 4 times.

$arr = array(
    getRandomStr(8, false),
    getRandomStr(8, false),
    getRandomStr(8, false),
    getRandomStr(8, false)
);
var_dump($arr);

Result:

array(4) { [0]=> string(8) "J02AzMyt" [1]=> string(8) "CN4W715t" [2]=> string(8) "ApSfn7rB" [3]=> string(8) "4yn5ivHz" }

And use the subscript to make a separate call:

echo $arr[0];

Result:

J02AzMyt

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