PHPで競技プログラミングのデバッグテンプレート ref: http://qiita.com/elzup/items/3a3e05d959b3db338bac

file2.txt

----- 0 -----
40

[0.01884ms]
----- 1 -----
600

[0.00381ms]
----- 2 -----
60

[0.00310ms]

input.txt

10
4
---
200
3
---
3
20

q1.php

<?php
// {{{ get input module
// debug input file name
define('DEBUG_FILENAME', 'input.txt');
/* first module start (setup $input) */
if(file_exists(DEBUG_FILENAME)) 
{
    $inputs = explode("\n---\n", file_get_contents(DEBUG_FILENAME));
    define('DEBUG', TRUE);
} else 
{
    $inputs = array(file_get_contents('php://stdin'));
    define('DEBUG', FALSE);
}
foreach ($inputs as $i => $input) {
    if (DEBUG) {
        echo "\n----- {$i} -----\n";
        $time_start = microtime(true);
    }
    solve($input);
    if (DEBUG) {
        $time_end = microtime(true);
        $time = $time_end - $time_start;
        echo sprintf("\n[%.5fms]", $time * 1000);
    }
}
// }}} -end

function solve($input) {
    list($a, $b) = explode("\n", trim($input));
    echo $a * $b . PHP_EOL;
}