<?php/* * 方法类 * */class functions{/** * PHP随机生成验证码函数 * * @param array * @returnmixed */function randCode($params = []){$num = $params['num'] ?? 4; //验证码个数$isLetter = $params['isLetter'] ? $params['isLetter'] : 1; //1是纯数字 2是字母和数字的组合if($isLetter==1){for($i=1;$i<=$num;$i++){$codeMin.=0;$codeMax.=9;}return rand($codeMin,$codeMax);}if($isLetter==2){//如果想调整权重，自己可以根据需求修改$codeArr这个一位数组$codeArr = ['1','2','3','4','5','6','7','8','9','0','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','e','s','t','u','v','w','x','y','z','1','2','3','4','5','6','7','8','9','0'];$codeKeys = array_rand($codeArr,$num);shuffle($codeKeys);foreach ($codeKeys as $codeValue){$codeStr .= $codeArr[$codeValue];}return $codeStr;}}}//测试生成验证码方法$re = (new functions())->randCode(['num'=> 6, //需要的个数'isLetter' => 2, //1是纯数字 2是数字加字符串]);print_r($re);

测试结果如下