CODEWITHSUNDEEP
phprandom
user3006683
user3006683

Reputation: 783

generating random string which is collision free

I am using the below code to generate random string which I then insert to the database, and I would like to know if it is collision free? Is there a better way that is collision free?

function generate_random_name() 
{
$length = 12;
$charactersa = "mRdxIU2r3dxa1B2c3D4e5F6g7H8i9Jqk1L2m13N1oF5P6qW7R1Ls9T20u21V2w3X4y2Z2x6";
$real_string_legntha = strlen($charactersa) - 1;
$stringa=rand(12345,09876);
for ($oluvica = 0; $oluvica < $length; $oluvica++)
{
    $stringa .= $charactersa[mt_rand(0, $real_string_legntha)];
}
return $stringa;

}
$unique = generate_random_name();

Upvotes: 0

Views: 331

Answers (1)

Shankar Narayana Damodaran
Shankar Narayana Damodaran

Reputation: 68526

Make use of uniqid() [With more entropy flag enabled] coupled with time()

<?php
echo uniqid(time(), true);

This will be more than enough. Coupling hashes like sha-256 and sha-512 will generate more unique outputs.

Some more info

Upvotes: 1

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