php_STD_functions.php

<?php 

$handle = fopen ("php://stdin","r");
fscanf($handle,"%d",$t);
for($a0 = 0; $a0 < $t; $a0++){
    fscanf($handle,"%d %d",$n,$k);
    $a_temp = fgets($handle);
    $a = explode(" ",$a_temp);
    array_walk($a,'intval');
}

///######

function writeOutput($output){
    fwrite(STDOUT, $output . "\n");  
}

function readInput($rows, $function = null){
    $results = [];
    for($i = 0; $i < $rows; $i++){
        if($function){
            $results[] = $function();
        }
        else{
            $results[] = fgets(STDIN);
        }
    }
    return $results;
}

///######

// array_walk($array, "intval");
$array = array_map("intval", $array);