CODEWITHSUNDEEP
php
halocursed
halocursed

Reputation: 2495

Create unique alpha numeric string for an input string/url?

I want to create a less than or equal to 10 character unique string for an input string which could be a url 

http://stackoverflow.com/questions/ask

OR an alpha numeric string

programming124

but the result should be unique for every input...Is their any function or class that you use for your projects in php... Thanks...

Upvotes: 0

Views: 611

Answers (2)

Gumbo
Gumbo

Reputation: 655359

If you want a unique and random string, you can use the following function to create a random string:

function randString($length) {
    $charset = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
    $str = '';
    while ($length-- > 0) {
        $str .= $charset[rand() % 62];
    }
    return $str;
}

After you have generated a new string, look up your database if that string already exists. If so, repeat that step until you’ve generated a unique string. Then store that new string in the database:

do {
    $randString = randString(10);
    // look up your database if $randString already exists and store the result in $exists
} while ($exists);
// store new random string in database

Upvotes: 2

Kevin Peno
Kevin Peno

Reputation: 9196

The simplest function available in php is uniqid. It is a little longer that you had mentioned, and wont work well with load balancing, but if you are doing something super simple, it should work alright.

Upvotes: 0

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