103 lines
2.4 KiB
PHP
103 lines
2.4 KiB
PHP
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<?php
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/**
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* Compat Functions
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*
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* @package EDD
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* @subpackage Functions
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* @copyright Copyright (c) 2018, Easy Digital Downloads, LLC
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* @license http://opensource.org/licenses/gpl-2.0.php GNU Public License
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* @since 1.0
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*/
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// Exit if accessed directly
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defined( 'ABSPATH' ) || exit;
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if ( ! function_exists( 'cal_days_in_month' ) ) :
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/**
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* Fallback in case the calendar extension is not loaded in PHP
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*
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* Only supports Gregorian calendar
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*/
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function cal_days_in_month( $calendar, $month, $year ) {
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return date( 't', mktime( 0, 0, 0, $month, 1, $year ) );
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}
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endif;
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if ( ! function_exists( 'hash_equals' ) ) :
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/**
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* Compare two strings in constant time.
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*
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* This function was added in PHP 5.6.
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* It can leak the length of a string.
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*
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* @since 2.2.1
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*
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* @param string $a Expected string.
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* @param string $b Actual string.
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* @return bool Whether strings are equal.
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*/
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function hash_equals( $a, $b ) {
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$a_length = strlen( $a );
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if ( $a_length !== strlen( $b ) ) {
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return false;
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}
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$result = 0;
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// Do not attempt to "optimize" this.
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for ( $i = 0; $i < $a_length; $i++ ) {
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$result |= ord( $a[ $i ] ) ^ ord( $b[ $i ] );
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}
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return $result === 0;
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}
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endif;
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if ( ! function_exists( 'getallheaders' ) ) :
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/**
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* Retrieve all headers
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*
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* Ensure getallheaders function exists in the case we're using nginx
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*
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* @since 2.4
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* @return array
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*/
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function getallheaders() {
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$headers = array();
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foreach ( $_SERVER as $name => $value ) {
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if ( substr( $name, 0, 5 ) == 'HTTP_' ) {
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$headers[ str_replace( ' ', '-', ucwords( strtolower( str_replace( '_', ' ', substr( $name, 5 ) ) ) ) ) ] = $value;
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}
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}
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return $headers;
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}
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endif;
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if ( ! function_exists( 'wp_timezone_string' ) ) :
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/**
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* Polyfill for wp_timezone_string() function added in WP 5.3.0
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*
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* Retrieves the timezone of the site as a string.
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*
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* @since 3.1.0.3
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* @return string PHP timezone name or a ±HH:MM offset.
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*/
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function wp_timezone_string() {
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$timezone_string = get_option( 'timezone_string' );
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if ( $timezone_string ) {
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return $timezone_string;
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}
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$offset = (float) get_option( 'gmt_offset' );
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$hours = (int) $offset;
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$minutes = ( $offset - $hours );
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$sign = ( $offset < 0 ) ? '-' : '+';
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$abs_hour = abs( $hours );
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$abs_mins = abs( $minutes * 60 );
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$tz_offset = sprintf( '%s%02d:%02d', $sign, $abs_hour, $abs_mins );
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return $tz_offset;
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}
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endif;
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