php: number only hash?

Question

In php is there a way to give a unique hash from a string, but that the hash was made up from numbers only?

example:

return md5(234); // returns 098f         


        

Answer 1

Just use my manual hash method below:

Divide the number (e.g. 6 digit) by prime values, 3,5,7.

And get the first 6 values that are in the decimal places as the ID to be used. Do a check on uniqueness before actual creation of the ID, if a collision exists, increase the last digit by +1 until a non collision.
E.g. 123456 gives you 771428 123457 gives you 780952 123458 gives you 790476.