php 随机数的产生、页面跳转、件读写、文件重命名、switch语句

<div class="codetitle"><a style="CURSOR: pointer" data="24485" class="copybut" id="copybut24485" onclick="doCopy('code24485')"> 代码如下:<div class="codebody" id="code24485">
<?php
num = rand(1,5);
witch($num){
case 1:
$fp1=fopen("f1.dat",'r');
$oname = fgets($fp1);
$nname = date("YmdHis"); rename($oname,$nname);
fclose($fp1);
unlink("f1.dat");
$fp1=fopen("f1.dat",'w');
fwrite($fp1,$nname);
fclose($fp1); header("Location: ".$nname."/1.html");
exit;
break;
case 2:
$fp2=fopen("f2.dat",'r');
$oname = fgets($fp2); $nname = date("YmdHis");
rename($oname,$nname);
fclose($fp2);
unlink("f2.dat");
$fp2=fopen("f2.dat",'w');
fwrite
($fp2,$nname);
fclose($fp2);
header("Location: ".$nname."/2.html");
exit;
break;
case 3:
$fp3=fopen
("f3.dat",'r');
$oname = fgets($fp3);
$nname = date("YmdHis");
rename($oname,$nname);
fclose($fp3);
unlink
("f3.dat");
$fp3=fopen("f3.dat",'w');
fwrite($fp3,$nname);
fclose($fp3);
header("Location: ".$nname."/3.html"); exit;
break;
case 4:
$fp4=fopen("f4.dat",'r');
$oname = fgets($fp4);
$nname = date("YmdHis");
rename
($oname,$nname);
fclose($fp4);
unlink("f4.dat");
$fp4=fopen("f4.dat",'w');
fwrite($fp4,$nname);
fclose($fp4); header("Location: ".$nname."/4.html");
exit;
break;
case 5:
$fp5=fopen("f5.dat",'r');
$oname = fgets($fp5); $nname = date("YmdHis");
rename($oname,$nname);
fclose($fp5);
unlink("f5.dat");
$fp5=fopen("f5.dat",'w');
fwrite
($fp5,$nname);
fclose($fp5);
header("Location: ".$nname."/5.html");
exit;
break;
default:
break;
}
?>

刚做的一个项目中的部分代码，包含了php中随机数的产生、页面跳转、件读写、文件重命名、switch语句。
特发表出来，希望能对php学习者能够有所帮助。

（编辑：李大同）

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