Codejam Qualification Round 2012 - Speaking in Tongues

speaking.php

<?php

$filename = 'A-small-practice.in';
$lines = file($filename);

$input_size = trim($lines[0]);

$map = array(
    'a' => 'y',
    'b' => 'h',
    'c' => 'e',
    'd' => 's',
    'e' => 'o',
    'f' => 'c',
    'g' => 'v',
    'h' => 'x',
    'i' => 'd',
    'j' => 'u',
    'k' => 'i',
    'l' => 'g',
    'm' => 'l',
    'n' => 'b',
    'o' => 'k',
    'p' => 'r',
    'q' => 'z',
    'r' => 't',
    's' => 'n',
    't' => 'w',
    'u' => 'j',
    'v' => 'p',
    'w' => 'f',
    'x' => 'm',
    'y' => 'a',
    'z' => 'q',
);

$line_decodes = array();

for ($i = 1; $i <= $input_size; $i++) {
    $line = trim($lines[$i]);
    $line_length = strlen($line);
    $line_decode = 'Case #' . $i . ': ';
    for ($j = 0; $j < $line_length; $j++) {
        
        if ($line[$j] == ' ') {
            $line_decode .= ' ';
            continue;
        }
        
        $line_decode .= $map[$line[$j]];
    }

    $line_decodes[] = $line_decode;
}

file_put_contents($filename.'.output.txt', implode("\n", $line_decodes));