[Resolved] Output randomly from an array

[kcgame]

Hi,

I would like to pick a random string inside my array, $checkkpswd[]. How can i go about it? I've checked the rand function but seems like its not the one.

Any comments/advice is appreciated. Thanks 🙂

[Shrike]

What type of array is it? If it's numerically keyed then you could use rand()

$string = $arr[rand(0, sizeof($arr)-1)];

If it uses strings for keys then perhaps

$string = $arr[array_rand($arr)];

edit: Cool 1337 posts 🆒

[andrewtayloruk]

http://www.php.net/array_rand

$input = Array(1,2,3,4,5,6,7,8);
$rand_keys = array_rand($input);

echo $input[$rand_keys[0]];

You can add an argument after $input, such as 4, this will give you a 4 item array each with a random value from $input.

echo $input[$rand_keys[0]];
echo $input[$rand_keys[1]];
echo $input[$rand_keys[2]];
echo $input[$rand_keys[3]];

HTH

Andrew

[kcgame]

Thanks, guys. The array_rand function works🙂

I'm now having a more complex problem, hope that you can help me out wih this one.

My objectives are as follows;

1. Select all the pswd from MySQL DB.

2. Stores the pswds into $checkkpswd[]

3. Pick a random pswd from the array, and check one of the columns' value for this pswd.

4. If not verified (some calculations), continue to pick another pswd from the array. (the program shall continue to loop till the below condition is verified)

5. Exit the loop only its verified.

I've already finished coding item number 1 to 3, but stuck at the looping...🙁What control structure can i use?
It would be great if there's a GOTO function in PHP, is there?

Thanks for your attention to my problem

[laserlight]

It would be great if there's a GOTO function in PHP, is there?

No need for a GOTO, a construct created before the days of Unix exists in PHP and can be used to solve your problem.

Consider a script that pseudo-randomly selects an even number from your array:

<?php
$input = array(1, 2, 3, 4, 5, 6, 7, 8);
$value = 0;
do {
	$value = $input[array_rand($input)];
} while ($value % 2 == 1);
echo $value;
?>

[kcgame]

Thanks, laserlight. The do while statement seems to get there much closer.
The only query about the example you given is that how can i ask the loop to pick a random number again if the $value output is not the even number i want?

For example, the even number i want is 8 but it output 4, so i would like it to loop again.

[kcgame]

okok, i've seen some light already..Think i can do something out of the do while loop. Will update again if i'm having problems. Thanks for the help so far🙂

[kcgame]

Yes, finally. Problem resovled! Thanks for everyone's help again😉