Question

How to generate all permutations of 1, 2 and 3 without repetition in PHP

Answer 1

for ($i = 1; $i <= 3; $i++) {  
    for ($j = 1; $j <= 3; $j++) {  
        for ($k = 1; $k <= 3; $k++) {  
            if ($i != $j && $i != $k && $j != $k) {
                echo $i . " " . $j . " " . $k . "\n";  
            }  
        }  
    } 
}

   
   
   
     
/*
run:
     
1 2 3
1 3 2
2 1 3
2 3 1
3 1 2
3 2 1
   
*/

 

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