<?php

/**

 * These functions are needed to load WordPress.

 *

 * @package WordPress

 */

/**

 * Return the HTTP protocol sent by the server.

 *

 * @since 4.4.0

 *

 * @return string The HTTP protocol. Default: HTTP/1.0.

 */

function wp_get_server_protocol() {

	$protocol = isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : '';

	if ( ! in_array( $protocol, array( 'HTTP/1.1', 'HTTP/2', 'HTTP/2.0' ), true ) ) {

		$protocol = 'HTTP/1.0';

	}

	return $protocol;

}

/**

 * Fix `$_SERVER` variables for various setups.

 *

 * @since 3.0.0

 * @access private

 *

 * @global string $PHP_SELF The filename of the currently executing script,

 *                          relative to the document root.

 */

function wp_fix_server_vars() {

	global $PHP_SELF;

	$default_server_values = array(

		'SERVER_SOFTWARE' => '',

		'REQUEST_URI'     => '',

	);

	$_SERVER = array_merge( $default_server_values, $_SERVER );

	// Fix for IIS when running with PHP ISAPI.

	if ( empty( $_SERVER['REQUEST_URI'] ) || ( 'cgi-fcgi' !== PHP_SAPI && preg_match( '/^Microsoft-IIS\//', $_SERVER['SERVER_SOFTWARE'] ) ) ) {

		if ( isset( $_SERVER['HTTP_X_ORIGINAL_URL'] ) ) {

			// IIS Mod-Rewrite.

			$_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_ORIGINAL_URL'];

		} elseif ( isset( $_SERVER['HTTP_X_REWRITE_URL'] ) ) {

			// IIS Isapi_Rewrite.

			$_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_REWRITE_URL'];

		} else {

			// Use ORIG_PATH_INFO if there is no PATH_INFO.

			if ( ! isset( $_SERVER['PATH_INFO'] ) && isset( $_SERVER['ORIG_PATH_INFO'] ) ) {

				$_SERVER['PATH_INFO'] = $_SERVER['ORIG_PATH_INFO'];

			}

			// Some IIS + PHP configurations put the script-name in the path-info (no need to append it twice).

			if ( isset( $_SERVER['PATH_INFO'] ) ) {

				if ( $_SERVER['PATH_INFO'] == $_SERVER['SCRIPT_NAME'] ) {

					$_SERVER['REQUEST_URI'] = $_SERVER['PATH_INFO'];

				} else {

					$_SERVER['REQUEST_URI'] = $_SERVER['SCRIPT_NAME'] . $_SERVER['PATH_INFO'];

				}

			}

			// Append the query string if it exists and isn't null.

			if ( ! empty( $_SERVER['QUERY_STRING'] ) ) {

				$_SERVER['REQUEST_URI'] .= '?' . $_SERVER['QUERY_STRING'];

			}

		}

	}

	// Fix for PHP as CGI hosts that set SCRIPT_FILENAME to something ending in php.cgi for all requests.

	if ( isset( $_SERVER['SCRIPT_FILENAME'] ) && ( strpos( $_SERVER['SCRIPT_FILENAME'], 'php.cgi' ) == strlen( $_SERVER['SCRIPT_FILENAME'] ) - 7 ) ) {

		$_SERVER['SCRIPT_FILENAME'] = $_SERVER['PATH_TRANSLATED'];

	}

	// Fix for Dreamhost and other PHP as CGI hosts.

	if ( strpos( $_SERVER['SCRIPT_NAME'], 'php.cgi' ) !== false ) {

		unset( $_SERVER['PATH_INFO'] );

	}

	// Fix empty PHP_SELF.

	$PHP_SELF = $_SERVER['PHP_SELF'];

	if ( empty( $PHP_SELF ) ) {

		$_SERVER['PHP_SELF'] = preg_replace( '/(\?.*)?$/', '', $_SERVER['REQUEST_URI'] );

		$PHP_SELF            = $_SERVER['PHP_SELF'];

	}

}

/**

 * Check for the required PHP version, and the MySQL extension or

 * a database drop-in.

 *

 * Dies if requirements are not met.

 *

 * @since 3.0.0

 * @access private

 *

 * @global string $required_php_version The required PHP version string.

 * @global string $wp_version           The WordPress version string.

 */

function wp_check_php_mysql_versions() {

	global $required_php_version, $wp_version;

	$php_version = phpversion();

	if ( version_compare( $required_php_version, $php_version, '>' ) ) {

		$protocol = wp_get_server_protocol();

		header( sprintf( '%s 500 Internal Server Error', $protocol ), true, 500 );

		header( 'Content-Type: text/html; charset=utf-8' );

		printf( 'Your server is running PHP version %1$s but WordPress %2$s requires at least %3$s.', $php_version, $wp_version, $required_php_version );

		exit( 1 );

	}

		require_once ABSPATH . WPINC . '/functions.php';

		wp_load_translations_early();

		$args = array(

			'exit' => false,

			'code' => 'mysql_not_found',

		);

		wp_die(

			__( 'Your PHP installation appears to be missing the MySQL extension which is required by WordPress.' ),

			__( 'Requirements Not Met' ),

			$args

		);

		exit( 1 );

	}

}

/**

 * Retrieves the current environment type.

 *

 * The type can be set via the `WP_ENVIRONMENT_TYPE` global system variable,

 * or a constant of the same name.

 *

 * If not set, the type defaults to 'production'.

 *

 * @since 5.5.0

 * @since 5.5.1 Added the 'local' type.

 * @since 5.5.1 Removed the ability to alter the list of types.

 *

 * @return string The current environment type.

 */

function wp_get_environment_type() {

	static $current_env = '';

	if ( $current_env ) {

		return $current_env;

	}

	$wp_environments = array(

		'local',

		'development',

		'staging',

		'production',

	);

	// Add a note about the deprecated WP_ENVIRONMENT_TYPES constant.

	if ( defined( 'WP_ENVIRONMENT_TYPES' ) && function_exists( '_deprecated_argument' ) ) {

		if ( function_exists( '__' ) ) {

			/* translators: %s: WP_ENVIRONMENT_TYPES */

			$message = sprintf( __( 'The %s constant is no longer supported.' ), 'WP_ENVIRONMENT_TYPES' );

		} else {

			$message = sprintf( 'The %s constant is no longer supported.', 'WP_ENVIRONMENT_TYPES' );

		}

		_deprecated_argument(

			'define()',

			'5.5.1',

			$message

		);

	}

	// Check if the environment variable has been set, if `getenv` is available on the system.

	if ( function_exists( 'getenv' ) ) {

		$has_env = getenv( 'WP_ENVIRONMENT_TYPE' );

		if ( false !== $has_env ) {

			$current_env = $has_env;

		}

	}

	// Fetch the environment from a constant, this overrides the global system variable.

	if ( defined( 'WP_ENVIRONMENT_TYPE' ) ) {

		$current_env = WP_ENVIRONMENT_TYPE;

	}

	// Make sure the environment is an allowed one, and not accidentally set to an invalid value.

	if ( ! in_array( $current_env, $wp_environments, true ) ) {

		$current_env = 'production';

	}

	return $current_env;

}

/**

 * Don't load all of WordPress when handling a favicon.ico request.

 *

 * Instead, send the headers for a zero-length favicon and bail.

 *

 * @since 3.0.0

 * @deprecated 5.4.0 Deprecated in favor of do_favicon().

 */

function wp_favicon_request() {

	if ( '/favicon.ico' === $_SERVER['REQUEST_URI'] ) {

		header( 'Content-Type: image/vnd.microsoft.icon' );

		exit;

	}

}

/**

 * Die with a maintenance message when conditions are met.

 *

 * The default message can be replaced by using a drop-in (maintenance.php in

 * the wp-content directory).

 *

 * @since 3.0.0

 * @access private

 */

function wp_maintenance() {

	// Return if maintenance mode is disabled.

	if ( ! wp_is_maintenance_mode() ) {

		return;

	}

	if ( file_exists( WP_CONTENT_DIR . '/maintenance.php' ) ) {

		require_once WP_CONTENT_DIR . '/maintenance.php';

		die();

	}

	require_once ABSPATH . WPINC . '/functions.php';

	wp_load_translations_early();

	header( 'Retry-After: 600' );

	wp_die(

		__( 'Briefly unavailable for scheduled maintenance. Check back in a minute.' ),

		__( 'Maintenance' ),

		503

	);

}

/**

 * Check if maintenance mode is enabled.

 *

 * Checks for a file in the WordPress root directory named ".maintenance".

 * This file will contain the variable $upgrading, set to the time the file

 * was created. If the file was created less than 10 minutes ago, WordPress

 * is in maintenance mode.

 *

 * @since 5.5.0

 *

 * @global int $upgrading The Unix timestamp marking when upgrading WordPress began.

 *

 * @return bool True if maintenance mode is enabled, false otherwise.

 */

function wp_is_maintenance_mode() {

	global $upgrading;

	if ( ! file_exists( ABSPATH . '.maintenance' ) || wp_installing() ) {

		return false;

	}

	require ABSPATH . '.maintenance';

	// If the $upgrading timestamp is older than 10 minutes, consider maintenance over.

	if ( ( time() - $upgrading ) >= 10 * MINUTE_IN_SECONDS ) {

		return false;

	}

	/**

	 * Filters whether to enable maintenance mode.

	 *

	 * This filter runs before it can be used by plugins. It is designed for

	 * non-web runtimes. If this filter returns true, maintenance mode will be

	 * active and the request will end. If false, the request will be allowed to

	 * continue processing even if maintenance mode should be active.

	 *

	 * @since 4.6.0

	 *

	 * @param bool $enable_checks Whether to enable maintenance mode. Default true.

	 * @param int  $upgrading     The timestamp set in the .maintenance file.

	 */

	if ( ! apply_filters( 'enable_maintenance_mode', true, $upgrading ) ) {

		return false;

	}

	return true;

}

/**

 * Start the WordPress micro-timer.

 *

 * @since 0.71

 * @access private

 *

 * @global float $timestart Unix timestamp set at the beginning of the page load.

 * @see timer_stop()

 *

 * @return bool Always returns true.

 */

function timer_start() {

	global $timestart;

	$timestart = microtime( true );

	return true;

}

/**

 * Retrieve or display the time from the page start to when function is called.

 *

 * @since 0.71

 *

 * @global float   $timestart Seconds from when timer_start() is called.

 * @global float   $timeend   Seconds from when function is called.

 *

 * @param int|bool $display   Whether to echo or return the results. Accepts 0|false for return,

 *                            1|true for echo. Default 0|false.

 * @param int      $precision The number of digits from the right of the decimal to display.

 *                            Default 3.

 * @return string The "second.microsecond" finished time calculation. The number is formatted

 *                for human consumption, both localized and rounded.

 */

function timer_stop( $display = 0, $precision = 3 ) {

	global $timestart, $timeend;

	$timeend   = microtime( true );

	$timetotal = $timeend - $timestart;

	$r         = ( function_exists( 'number_format_i18n' ) ) ? number_format_i18n( $timetotal, $precision ) : number_format( $timetotal, $precision );

	if ( $display ) {

		echo $r;

	}

	return $r;

}

/**

 * Set PHP error reporting based on WordPress debug settings.

 *

 * Uses three constants: `WP_DEBUG`, `WP_DEBUG_DISPLAY`, and `WP_DEBUG_LOG`.

 * All three can be defined in wp-config.php. By default, `WP_DEBUG` and

 * `WP_DEBUG_LOG` are set to false, and `WP_DEBUG_DISPLAY` is set to true.

 *

 * When `WP_DEBUG` is true, all PHP notices are reported. WordPress will also

 * display internal notices: when a deprecated WordPress function, function

 * argument, or file is used. Deprecated code may be removed from a later

 * version.

 *

 * It is strongly recommended that plugin and theme developers use `WP_DEBUG`

 * in their development environments.

 *

 * `WP_DEBUG_DISPLAY` and `WP_DEBUG_LOG` perform no function unless `WP_DEBUG`

 * is true.

 *

 * When `WP_DEBUG_DISPLAY` is true, WordPress will force errors to be displayed.

 * `WP_DEBUG_DISPLAY` defaults to true. Defining it as null prevents WordPress

 * from changing the global configuration setting. Defining `WP_DEBUG_DISPLAY`

 * as false will force errors to be hidden.

 *

 * When `WP_DEBUG_LOG` is true, errors will be logged to `wp-content/debug.log`.

 * When `WP_DEBUG_LOG` is a valid path, errors will be logged to the specified file.

 *

 * Errors are never displayed for XML-RPC, REST, and Ajax requests.

 *