KCL Tech Election PIN Sender

kcltechpins.php

<?php

// init mailer
require('/usr/share/php/Mail.php');
$factory =& Mail::factory('smtp',
	array(
		// SMTP auth info removed
	)
);
$headers['From'] = 'Mark Ormesher <[email protected]>';
$headers['Subject'] = 'Your Election PIN';

// targets
$emails = []; // email list removed

// pins
$pins = [];

foreach ($emails as $e) {
	// generate pin (must be unique)
	do {
		$pin = strtoupper(md5($e . rand(1,1000000)));
		$pinChunk = rand(0,25);
		$pin = substr($pin, $pinChunk, 6);
	} while (in_array($pin, $pins));
	$pins[] = $pin;

	// send pin
	$headers['To'] = $e;
	$sending = $factory->send($headers['To'], $headers, 'Your election PIN is ' . $pin . '. Please check the KCL Tech Slack if you don\'t know what this is.');
	if ($sending) {
		echo('Sent to ' . $e . '<br />');
	} else {
		echo('Failed to send to ' . $e . '<br />');
	}
}

// randomly re-order
shuffle($pins);

// print
echo('The following PINs were issued:<br />');
echo(implode(', ', $pins));