T-Swift's hit song, in PHP form.

shake_it_off.php

<?php

// Run this script from your terminal whenever the haters got you down.

$negativity = array(
		"players" => "play",
		"haters" => "hate",
		"Heart-breakers" => "break",
		"fakers" => "fake"
);

// Start building the chorus
$chorus = "'Cause the ";

foreach ($negativity as $group => $verb) {
	if ($group == "players") {
		$chorus .= "$group gonna ";
		for ($i = 0; $i < 5; $i++) {
			$chorus .= "$verb, ";
		}
		$chorus = rtrim($chorus, ", ") . "\n";
	} else if ($group == "haters") {
		$chorus .= "And the $group gonna ";
		for ($i = 0; $i < 5; $i++) {
			$chorus .= "$verb, ";
		}
		$chorus = rtrim($chorus, ", ") . "\n";
	} else {
		break;
	}
}

$shake_off = "Baby, I'm just gonna shake, shake, shake, shake, shake\n";
$shake_off .= "I shake it off, shake it off.\n";

$chorus .= $shake_off;

// Second part of chorus
foreach ($negativity as $group => $verb) {
	if ($group == "Heart-breakers") {
		$chorus .= "$group gonna ";
		for ($i = 0; $i < 5; $i++) {
			$chorus .= "$verb, ";
		}
		$chorus = rtrim($chorus, ", ") . "\n";
	} else if ($group == "fakers") {
		$chorus .= "And the $group gonna ";
		for ($i = 0; $i < 5; $i++) {
			$chorus .= "$verb, ";
		}
		$chorus = rtrim($chorus, ", ") . "\n";
	} else {
		next($negativity);
	}
}

$chorus .= $shake_off;

echo $chorus;

?>