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php生成随机字符串可指定纯数字、纯字母或者混合的_php技巧

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2016-05-17 08:45:56933browse

php 生成随机字符串

可以指定是纯数字 还是纯字母 或者混合的。

可以指定长度的。

复制代码 代码如下:

function rand_zifu($what,$number){
$string='';
for($i = 1; $i //混合
$panduan=1;
if($what == 3){
if(rand(1,2)==1){
$what=1;
}else{
$what=2;
}
$panduan=2;
}

//数字
if($what==1){
$string.=rand(0,9);
}elseif($what==2){
//字母
$rand=rand(0,24);
$b='a';
for($a =0;$a $b++;
}
$string.=$b;
}
if($panduan==2)$what=3;
}
return $string;
}
echo rand_zifu(3,10);
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