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php中如何使用rand()函数

发表于:2024-11-26 作者:千家信息网编辑
千家信息网最后更新 2024年11月26日,这篇文章主要介绍了php中如何使用rand()函数,具有一定借鉴价值,感兴趣的朋友可以参考下,希望大家阅读完这篇文章之后大有收获,下面让小编带着大家一起了解一下。@session_start();
千家信息网最后更新 2024年11月26日php中如何使用rand()函数

这篇文章主要介绍了php中如何使用rand()函数,具有一定借鉴价值,感兴趣的朋友可以参考下,希望大家阅读完这篇文章之后大有收获,下面让小编带着大家一起了解一下。

@session_start();    $currentTime = time();    $changeTime = 10;    $rand = '';    if(isset($_SESSION['time'])) {       if(($currentTime - $_SESSION['time']) >= $changeTime) {            $_SESSION['time'] = $currentTime;              $rand = (0, 9999);              $_SESSION['rand'] = $rand;       }else{               $rand = $_SESSION['rand'];       }    }else{        $_SESSION['time'] = $currentTime;        $rand = (0, 9999);        $_SESSION['rand'] = $rand;    }           = $changeTime) {                        switch ($_i){                           case '0':                           $_SESSION['rand'][$_i] = mt_rand(100,200);                           $rand = $_SESSION['rand'][$_i];                            break;                           case '1':                           $_SESSION['rand'][$_i] = mt_rand(200,300);                           $rand = $_SESSION['rand'][$_i];                            break;                           case '2':                           $_SESSION['rand'][$_i] = mt_rand(300,400);                           $rand = $_SESSION['rand'][$_i];                            break;                        }                        $_SESSION['time'][$_i] = $currentTime;                }else{                         switch ($_i){                           case '0':                           $rand = $_SESSION['rand'][$_i];                                 break;                           case '1':                           $rand = $_SESSION['rand'][$_i];                            break;                           case '2':                           $rand = $_SESSION['rand'][$_i];                           break;                        }                }        }else{                if(!isset($_SESSION['time'])){                        $_SESSION['time'] = array();                }       switch ($_i){                           case '0':                           $_SESSION['rand'][$_i] = mt_rand(100,200);                           $rand = $_SESSION['rand'][$_i];                            break;                           case '1':                           $_SESSION['rand'][$_i] = mt_rand(200,300);                           $rand = $_SESSION['rand'][$_i];                            break;                           case '2':                           $_SESSION['rand'][$_i] = mt_rand(300,400);                           $rand = $_SESSION['rand'][$_i];                            break;                        }                        $_SESSION['time'][$_i] = $currentTime;    }    return $rand;}?>
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