threes sum brutforce

threeSum.php

<?php

 function threeSum($nums) {
    $results = [];
    $max=count($nums);
    sort($nums);
    
    print_r($nums);
    
    for ($a = 0;$a < $max;$a++) {
        
        $first = $nums[$a];
        for ($b = $a+1; $b<$max; $b++) {
            $second = $nums[$b];
            
            $match = -($first+$second);
            
            var_dump($match);
            
            echo "{$first};{$second} =>";
            echo $match . PHP_EOL;
            
            $slice = array_slice($nums, $b);
            
            echo join(':', $slice) . PHP_EOL;
            
            $third_pos = array_search($match, $slice, TRUE);
            if ($third_pos !== FALSE) {
                if (array_search([$first, $second, $slice[$third_pos]], $results, TRUE) === FALSE) {
                    $results[] = [$first, $second, $slice[$third_pos]];
                }
                
            }
        }
        
        
    }
    
    return $results;
}

print_r(threeSum([0,0,0]));

//print_r(threeSum([-1, 0, 1, 2, -1, -4]));