Random ID/Number Generator in PHP

Question

I am building a list of \"agent id\'s\" in my database with the following requirements:

1. The ID must be 9 digits long (numeric only)
2. The ID may not con

Answer 1

For second condition, you can create an array like this

$a = array( 0,0,1,1,2,2,3,3.....,9,9 );

and get random elements: array_rand() (see manual) to get digit, append it to your ID and remove value from source array by unsetting at index.

Generally, this solving also third condition, but this solution excludes all ID's with possible and acceptable three digits