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122 lines
3.1 KiB
PHP
122 lines
3.1 KiB
PHP
<?php
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/**
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* Entry point for the API. This sets up cora, the error/exception handlers,
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* and then sends the request off for processing. All requests should start
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* here.
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*
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* @author Jon Ziebell
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*/
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// Compress output.
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ob_start('ob_gzhandler');
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// Set a reasonable time limit.
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set_time_limit(5);
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// Turn on all error reporting but disable displaying errors.
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error_reporting(-1);
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ini_set('display_errors', '0');
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date_default_timezone_set('UTC');
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// Autoload classes as necessary so there are no includes/requires. Note that
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// calling spl_autoload_register() with no arguments is actually faster than
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// this. The only reason I'm defining this function is because the default
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// autoloader lowercases everything which tends to break other libraries.
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spl_autoload_register(function($class) {
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include str_replace('\\', '/', $class) . '.php';
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});
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// Construct request and set up error handlers.
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$request = cora\request::get_instance();
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set_error_handler([$request, 'error_handler']);
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set_exception_handler([$request, 'exception_handler']);
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// The shutdown handler will output the response.
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register_shutdown_function([$request, 'shutdown_handler']);
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// Go!
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$request->process($_REQUEST);
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// Useful function
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function array_median($array) {
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$count = count($array);
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if($count === 0) {
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return null;
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}
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$middle = floor($count / 2);
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sort($array, SORT_NUMERIC);
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$median = $array[$middle]; // assume an odd # of items
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// Handle the even case by averaging the middle 2 items
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if ($count % 2 == 0) {
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$median = ($median + $array[$middle - 1]) / 2;
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}
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return $median;
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}
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// Useful function
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function array_mean($array) {
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$count = count($array);
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if($count === 0) {
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return null;
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}
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return array_sum($array) / $count;
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}
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// Useful function
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function array_standard_deviation($array) {
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$count = count($array);
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if ($count === 0) {
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return null;
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}
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$mean = array_mean($array);
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$variance = 0;
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foreach($array as $i) {
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$variance += pow(($i - $mean), 2);
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}
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return round(sqrt($variance / $count), 1);
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}
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/**
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* Convert a local datetime string to a UTC datetime string.
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*
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* @param string $local_datetime Local datetime string.
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* @param string $local_time_zone The local time zone to convert from.
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*
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* @return string The UTC datetime string.
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*/
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function get_utc_datetime($local_datetime, $local_time_zone, $format = 'Y-m-d H:i:s') {
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$local_time_zone = new DateTimeZone($local_time_zone);
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$utc_time_zone = new DateTimeZone('UTC');
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$date_time = new DateTime($local_datetime, $local_time_zone);
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$date_time->setTimezone($utc_time_zone);
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return $date_time->format($format);
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}
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/**
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* Convert a UTC datetime string to a UTC datetime string.
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*
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* @param string $utc_datetime Local datetime string.
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* @param string $local_time_zone The local time zone to convert from.
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*
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* @return string The UTC datetime string.
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*/
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function get_local_datetime($utc_datetime, $local_time_zone, $format = 'Y-m-d H:i:s') {
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$local_time_zone = new DateTimeZone($local_time_zone);
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$utc_time_zone = new DateTimeZone('UTC');
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$date_time = new DateTime($utc_datetime, $utc_time_zone);
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$date_time->setTimezone($local_time_zone);
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return $date_time->format($format);
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}
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