<?php function starts_with($haystack, $needle) { return ($needle === "" || strrpos($haystack, $needle, -strlen($haystack)) !== false); } function ends_with($haystack, $needle) { return ($needle === "" || strpos($haystack, $needle, strlen($haystack) - strlen($needle)) !== false); } function error($code, $message) { header("HTTP/ $code $message"); die(json_encode(array("code" => intval($code), "message" => $message))); } function get_post($key, $is_error = true) { if (isset($_POST[$key])) return $_POST[$key]; else if ($is_error) error(400, "Missing parameters"); else return false; } function check_table_field($header, $table, $field) { $headers = apache_request_headers(); if (!isset($headers[$header])) return false; $u = database_exec("SELECT id FROM $table WHERE `$field` = :data", array(":data" => $headers[$header]))->fetch(); if (!$u) return false; return $headers[$header]; } ?>