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which one is better?

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Mar 11.2010

Which one do you prefer among the two?

[code=php]function genRandomNo($length = 5){
$string = substr(md5(uniqid(rand(), true)), 0, $length);
return $string;
}[/code]

Vs

[code=php]function genRandomNo($length = 5){
$string = substr(md5(microtime() * mktime()), 0, $length);
return $string;
}[/code]

also you can suggest alternatives.

Thanks

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PHP

3 Comments(s) ↴

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@MindzaiMar 11.2010 — depends what you want it to do! If you just want a random number I'd use mt_rand() and be done with it. If you want a random string i'd use uniqid(). But unless you tell us what it's far it's hard to offer advice.
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@dk_zero-coolMar 11.2010 — For a random string, I would go with something like the first one. Using time functions does not generate anything random.
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@scragarMar 11.2010 — To be perfectly fair neither produces a random string(although the first one would have a random part). If you want a random number just generate a random number and be done with it:
[code=php]function genRandomNo($length = 5){
$string='';
for($i = $length; $i; $i--)
$string .= dechex(rand(0,15));
return $string;
}[/code]
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