Question

How to generate all permutations of a given 3 characters in lengths of 1, 2 and 3 in PHP

Answer 1

function combinations($arr, $size) {
    for ($i = 0; $i < $size; $i++) {
        echo $arr[$i] . "\n";
        for ($j = 0; $j <= $size - 1; $j++) {  
            echo $arr[$i] . $arr[$j] . "\n";
            for ($k = 0; $k <= $size - 1; $k++) {  
                echo $arr[$i] . $arr[$j] . $arr[$k] . "\n";
            }
        }
    }
}
 
 
 
$arr = array('a', 'b', 'c');
 
combinations($arr, 3);
 
 
 
 
 
 
/*
run:
 
a
aa
aaa
aab
aac
ab
aba
abb
abc
ac
aca
acb
acc
b
ba
baa
bab
bac
bb
bba
bbb
bbc
bc
bca
bcb
bcc
c
ca
caa
cab
cac
cb
cba
cbb
cbc
cc
cca
ccb
ccc
 
*/

 

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