php 随机数的产生、页面跳转、件读写、文件重命名、switch语句

　　复制代码 代码如下:
<?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。