IP White List Update Cron

ip-white-list-cron.php

<?php

## ./ip-white-list-cron.php

$whitelist_json = __DIR__.'/whitelist.json';
$cache_mtime = filemtime($whitelist_json);
$write_error = 'Write Error. This needs to be properly setup to be able to write to '.$whitelist_json.PHP_EOL;

if ( $cache_mtime === false ) {
	if ( touch($whitelist_json) === false) {
		trigger_error($write_error, E_USER_ERROR);
	}
}
elseif (!is_writeable($whitelist_json)) {
	trigger_error($write_error, E_USER_ERROR);
}

if (filemtime(__FILE__) >= $cache_mtime) {

	$json = json_encode( array(

		'111.222.333.444',  ## Office One
		'111.222.333.444',  ## Office Two
		'111.222.333.444',  ## Office Three
		'111.222.333.444',  ## Remote User One
		'111.222.333.444',  ## Remote User Two
		'111.222.333.444',  ## Remote User Three

	) );

	$bytes_written = file_put_contents( $whitelist_json, $json );
	if ($bytes_written === false) {
		trigger_error($write_error, E_USER_ERROR);
	}
}

exit;