data.php

<?php

require_once 'data.methods.php';

/* =============================================================================
   Main
   ========================================================================== */

// Get Format String
$format_string            = first_match('/(html|js|json|xml)/', @$_GET['format'], 'js');

// Get Callback String
$callback_string          = @$_GET['callback'];

// Get Requested Features List
$requested_features_array = explode(' ', @$_GET['features']);

// Get Requested Style String
$requested_style_string   = (
	isset($_GET['texticon']) ? 'texticon' : (
		isset($_GET['text']) ? 'text' : (
			isset($_GET['icon']) ? 'icon' : 'button'
		)
	)
);

// Get Requested CSS Boolean
$requested_style_boolean    = !isset($_GET['nostyle']);

// Get JSON Arrays
$agents_array       = get_cached_array('agents',    $requested_features_array);
$support_array      = get_cached_array('support',   $requested_features_array);
$features_array     = get_cached_array('features',  $requested_features_array);

// Get User Agent Array
$user_agent_array   = get_user_agent_array($agents_array);

// Get Extended Arrays
$alternatives_array = get_alternatives_array($agents_array, $support_array, $user_agent_array);
$upgradable_array   = get_upgradable_array($support_array, $user_agent_array);
$unsupported_array  = get_unsupported_array($support_array, $user_agent_array);

// Get Supporting Variables
$supported_string   = @$support_array['agents'][$user_agent_array['id']];
$supported_boolean  = $supported_string && version_compare($supported_string, $user_agent_array['version']) < 1;
$error_boolean      = isset($support_array['error']);

// Set Return Array
if (!$error_boolean) {
	$return_array   = array('current' => $user_agent_array, 'features' => $features_array, 'supported' => $supported_boolean);
} else {
	$return_array   = $support_array;
}

// Extend Return Array
if ($supported_boolean) {
	$return_array['alternatives'] = $alternatives_array;
} else if (!$error_boolean) {
	if (isset($upgradable_array)) {
		$return_array['upgradable'] = $upgradable_array;
	}

	$return_array['unsupported'] = $unsupported_array;
	$return_array['alternatives'] = $alternatives_array;
}

// Ouput
if ($format_string === 'js' && $callback_string) {
	$return_string = json_encode($return_array);

	header('Content-Type: text/javascript');

	exit($callback_string . '(' . $return_string . ')');
} elseif ($format_string === 'js') {
	$return_string = json_encode($return_array);

	header('Content-Type: text/javascript');

	exit($return_string);
} elseif ($format_string === 'html' && $callback_string) {
	$html = html_encode($return_array, $requested_style_string);

	$return_array['html'] = $html;

	$return_string = json_encode($return_array);

	header('Content-Type: text/javascript');

	exit($callback_string . '(' . $return_string . ')');
} elseif ($format_string === 'html') {

	$html = html_encode($return_array, $requested_style_string, $requested_style_boolean);

	$html_container = file_get_contents('tpl.html.html');

	$html_container = preg_replace('/<%= title %>/', 'Can I Use API', $html_container);
	$html_container = preg_replace('/<%= content %>/', $html, $html_container);

	header('Content-Type: text/html');

	print($html_container);
	exit();
} elseif ($format_string === 'xml') {
	header('Content-Type: text/xml');

	$xml = xml_encode($return_array);

	exit($xml);
}

?>