Online PHP editor | output for LdNlI

@ 2014-08-01T12:41:29Z

<?php
$array1 = array('A', 'B');
$array2 = array('1', '2', '3');

$num = count($array2);
$comb = array();

//The total number of possible combinations
$total = pow(2, $num);

//Loop through each possible combination  
for ($i = 0; $i < $total; $i++) 
{    
    $flag = '';      
    //For each combination check if each bit is set 
    for ($j = 0; $j < $num; $j++) 
    { 
       //Is bit $j set in $i? 
        if (pow(2, $j) & $i) $flag = $flag.''.$array2[$j];
    }
    if(!empty($flag))
    	$comb[] = $flag;
}


$result = array();

foreach($array1 as $val)
{
	foreach($comb as $co)
    {
        $result[] = $val."".$co;
    }
}

print_r($result);

Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0: Array ( [0] => A1 [1] => A2 [2] => A12 [3] => A3 [4] => A13 [5] => A23 [6] => A123 [7] => B1 [8] => B2 [9] => B12 [10] => B3 [11] => B13 [12] => B23 [13] => B123 )
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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