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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 $str = ''; for($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) , '<br>'; echo getRandomStr(8, false) , '<br>'; echo getRandomStr(8, false) , '<br>'; echo getRandomStr(8, false) , '<br>';
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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