PHP学习笔记：利用时间和mt_rand函数获取随机名字

这个知识会在文件上传等场合用到，还没学面向对象，现在用函数形式呈献给各位，代码都做了备注，有不懂得可以在线提问。

php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2016/9/19 0019
 * Time: 19:47
 */
function rdname(){
    $t = getdate();
    $year=$t['year'];
    $month = $t['mon']$t['mon']:$t['mon'];
    $day = $t['mday']>9?$t['mday']:"0".$t['mday'];
    $hour= $t['hours']>9?$t['hours']:"0".$t['hours'];
    $min = $t['minutes']>9?$t['minutes']:"0".$t['minutes'];
    $sec = $t['seconds']>9?$t['seconds']:"0".$t['seconds'];
    $randnum=mt_rand(1000,9999);//获取随机的4个数字
    $randname=$year.$month.$day.$hour.$min.$sec.$randnum;//把年月日时分和随机数拼接起来
   return $randname;//返回新的名字
}
$newname=rdname();
echo $newname;
?>php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2016/9/19 0019
 * Time: 19:47
 */
function rdname(){
    $t = getdate();
    $year=$t['year'];
    $month = $t['mon']$t['mon']:$t['mon'];
    $day = $t['mday']>9?$t['mday']:"0".$t['mday'];
    $hour= $t['hours']>9?$t['hours']:"0".$t['hours'];
    $min = $t['minutes']>9?$t['minutes']:"0".$t['minutes'];
    $sec = $t['seconds']>9?$t['seconds']:"0".$t['seconds'];
    $randnum=mt_rand(1000,9999);//获取随机的4个数字
    $randname=$year.$month.$day.$hour.$min.$sec.$randnum;//把年月日时分和随机数拼接起来
   return $randname;//返回新的名字
}
$newname=rdname();//把返回的名字赋值给$newname

echo $newname; ?>

效果展示：