PHP: Brute Force Dictionary Generator

Question

I'm looking for a concept istead of a code.

I have this alphanumrical string: abcdefghijklmnopqrstuvwxyz1234567890 and I want my combination's lenght is , for example, 16

In other words I ask the main concept to have all possible combination mixes like this:

a01g51bhk898qw233

max lenght = 16

An example in php is appreciated but since I would use it in cross-platform scripts I was also interested in the explanation of the "how to"

Very Thanks

Oscar

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Update Question

it sound like "I take each array element and create the maximum combination limiting to 16 char"....

I try to make this simple example with 2 element string and max lenght 4

MyStr = "A0"
MaxLen = 4

So My result is

AAAA
A000
AA00
AAA0
A0A0
A0AA
A00A
AA0A
0000
0AAA
00AA
000A
0A0A
0A00
0AA0
00A0

Another more simple example, with 4 element string and max lenght 2

MyStr = "A012"
MaxLen = 2

So My result is

AA
A0
A1
A2
0A
00
01
02
1A
10
11
12
2A
20
21
22

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Now it's more clear?

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Answer 1

This May help:

$string=substr(str_shuffle("abcdefghijklmnopqrstuvwxyz1234567890"),0,16);

Explanation: The function str_shuffle() shuffles the string in an random way. The function substr() returns first 16 characters of the random string.

Answer 2

you just need to look around stackoverflow ^_^ , i did it for you you just have to limit the lenght

How to create possible combinations of strings from string in php?