[TUTORIAL]Generating Random string

manqka · 08-27-2009, 07:13 AM

Just simple code to generate random strings:

You can change the chars in $chars

PHP Code:

  <?

function RandomString($length)

{

    $chars = "abcdefghijklmnopqrstuvwxyz0123456789";

????: NamePros.com http://www.namepros.com/code/606140-tutorial-generating-random-string.html
    srand((double)microtime() * 1000000);

    $str = "";

????: NamePros.com http://www.namepros.com/showthread.php?t=606140
    $i = 0;

    

        while ($i < $length) {

            $num = rand() % 33;

            $tmp = substr($chars, $num, 1);

            $str = $str . $tmp;

            $i++;

        }

    return $str;

}

 
$string = RandomString(5);

 
echo "$string";

?>

chadsmith · 08-27-2009, 09:02 AM

Great function. The one I usually use for PHP is:

PHP Code:

  <?php

function random_id(){

    $charset='0123456789abcdefghijklmnopqrstuvqxyzABCDEFGHIJKLMNOPQRSTUVQXYZ';

    $max=strlen($charset)-1;

    $id='';

    $len=32;

    while($len--)

        $id.=$charset[mt_rand(0,$max)];

    return $id;

????: NamePros.com http://www.namepros.com/showthread.php?t=606140
}

?>

It appears to be slightly faster. And for JavaScript:

Code:

function random_id(){
	var
		charset='0123456789abcdefghijklmnopqrstuvqxyzABCDEFGHIJKLMNOPQRSTUVQXYZ',
		max=charset.length,
		id='',
		len=32,
		ptr;
	while(len--)
		id+=charset.substring(ptr=Math.floor(Math.random()*max),ptr+1);
	return id
};

manqka · 08-28-2009, 01:35 AM

Yes this is a way too

.

bodil4o · 08-28-2009, 02:23 AM

Cool tutorial!
Thanks!

08-27-2009, 07:13 AM	THREAD STARTER #1 (permalink)
manqka NamePros Member Join Date: Aug 2009 Posts: 26	[TUTORIAL]Generating Random string Just simple code to generate random strings: You can change the chars in $chars PHP Code: <? function RandomString($length) { $chars = "abcdefghijklmnopqrstuvwxyz0123456789"; ????: NamePros.com http://www.namepros.com/code/606140-tutorial-generating-random-string.html srand((double)microtime() * 1000000); $str = ""; ????: NamePros.com http://www.namepros.com/showthread.php?t=606140 $i = 0; while ($i < $length) { $num = rand() % 33; $tmp = substr($chars, $num, 1); $str = $str . $tmp; $i++; } return $str; } $string = RandomString(5); echo "$string"; ?>

08-27-2009, 09:02 AM	#2 (permalink)
chadsmith NamePros Regular Join Date: Jul 2008 Location: Wichita, KS Posts: 287 Follow @chadsmith	Great function. The one I usually use for PHP is: PHP Code: `<?php function random_id(){ $charset='0123456789abcdefghijklmnopqrstuvqxyzABCDEFGHIJKLMNOPQRSTUVQXYZ'; $max=strlen($charset)-1; $id=''; $len=32; while($len--) $id.=$charset[mt_rand(0,$max)]; return $id; ????: NamePros.com http://www.namepros.com/showthread.php?t=606140 } ?>` It appears to be slightly faster. And for JavaScript: Code: function random_id(){ var charset='0123456789abcdefghijklmnopqrstuvqxyzABCDEFGHIJKLMNOPQRSTUVQXYZ', max=charset.length, id='', len=32, ptr; while(len--) id+=charset.substring(ptr=Math.floor(Math.random()max),ptr+1); return id }; __________________ Free Services: Alertable.com, DetectMobileBrowser.com, DropCart.com, FreeCronJobs.com, HTMLDTD.com, ImagePNG.com, NoCart.com, phpMyLogin.com, RandomTweeps.com, SearchFriendlyURLs.com For Sale: Keyword Domains / Generics See Also:*: Google Voice Add-on for Firefox, Google Wave Add-on for Firefox

08-28-2009, 01:35 AM	THREAD STARTER #3 (permalink)
manqka NamePros Member Join Date: Aug 2009 Posts: 26	Yes this is a way too .

08-28-2009, 02:23 AM	#4 (permalink)
bodil4o Account Suspended Join Date: Aug 2009 Posts: 164	Cool tutorial! Thanks!

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