wordpress/php-fpm/wordpress_files/plugins/backwpup/inc/functions.php

<?php
/**
 * Template Function
 *
 * @since 3.5.0
 *
 * @param object $bind      The object to use within the view.
 * @param string $file_path The path of the file to include.
 */
function backwpup_template( $bind, $file_path ) {

	$file_path = \BackWPup_Sanitize_Path::sanitize_path_regexp( $file_path );

	if ( ! $file_path ) {
		throw new \InvalidArgumentException(
			sprintf(
				'Invalid or malformed file path %s: for template function.',
				$file_path
			)
		);
	}

	// Build the path.
	$path = untrailingslashit( BackWPup::get_plugin_data( 'plugindir' ) ) . '/views/' . ltrim( $file_path, '\\/' );

	if ( ! file_exists( $path ) ) {
		throw new \InvalidArgumentException(
			sprintf(
				'Cannot locate the template %s in template function.',
				$path
			)
		);
	}

	include $path;
}

/**
 * Convert String To Boolean
 *
 * @since 3.5.0
 *
 * @param string|int $value The string to convert to boolean. 'yes', 1, 'true', '1' are converted to true.
 *
 * @return bool True or false depending on the passed value.
 */
function backwpup_string_to_bool( $value ) {

	return is_bool( $value )
		? $value
		: ( 'yes' === $value || 1 === $value || 'true' === $value || '1' === $value || 'on' === $value );
}

/**
 * Convert Boolean to String
 *
 * @since 3.5.0
 *
 * @param bool $bool The bool value to convert.
 *
 * @return string The converted value. 'yes' or 'no'.
 */
function backwpup_bool_to_string( $bool ) {

	if ( ! is_bool( $bool ) ) {
		$bool = backwpup_string_to_bool( $bool );
	}

	return true === $bool ? 'yes' : 'no';
}

/**
 * Is JSON
 *
 * Check if a string is a valid json or not.
 *
 * @link  https://codepad.co/snippet/jHa0m4DB
 *
 * @since 3.5.0
 *
 * @param string $data The json string.
 *
 * @return bool True if the string is a json, false otherwise
 */
function backwpup_is_json( $data ) {

	if ( ! is_string( $data ) || ! trim( $data ) ) {
		return false;
	}

	return (
			// Maybe an empty string, array or object.
			$data === '""'
			|| $data === '[]'
			|| $data === '{}'
			|| $data[0] === '"' // Maybe an encoded JSON string.
			|| $data[0] === '[' // Maybe a flat array.
			|| $data[0] === '{' // Maybe an associative array.
		)
		&& json_decode( $data ) !== null;
}

/**
 * Clean JSON from request
 *
 * @since 3.5.0
 *
 * @param string $json The json.
 *
 * @return string The cleaned json string
 */
function backwpup_clean_json_from_request( $json ) {

	// Remove slashes added by WordPress.
	$slashed_json = wp_unslash( $json );

	if ( backwpup_is_json( $slashed_json ) ) {
		// phpcs:ignore
		$json = filter_var( $slashed_json, FILTER_SANITIZE_STRING );
		$json = html_entity_decode( $json );
	}

	return $json;
}

/**
 * Retrieve the instance of the Filesystem used by WordPress
 *
 * @since 3.5.0
 *
 * @return mixed An instance of WP_Filesystem_* depending on the method set.
 */
function backwpup_wpfilesystem() {

	global $wp_filesystem;

	if ( ! $wp_filesystem ) {
		// Make sure the WP_Filesystem function exists.
		if ( ! function_exists( 'WP_Filesystem' ) ) {
			require_once untrailingslashit( ABSPATH ) . '/wp-admin/includes/file.php';
		}

		WP_Filesystem();
	}

	return $wp_filesystem;
}

/**
 * Get WPDB Instance
 *
 * With this function you get the global $wpdb instance of the class
 *
 * @since 3.5.0
 *
 * @return wpdb The instance of the class
 */
function backwpup_wpdb() {

	global $wpdb;

	return $wpdb;
}

/**
 * Remove Invalid Characters from Directory Name
 *
 * @since 3.5.0
 *
 * @param string $directory The directory path.
 *
 * @return string The cleaned directory path
 */
function remove_invalid_characters_from_directory_name( $directory ) {

	return str_replace(
		array(
			"?",
			"[",
			"]",
			"\\",
			"=",
			"<",
			">",
			":",
			";",
			",",
			"'",
			"\"",
			"&",
			"$",
			"#",
			"*",
			"(",
			")",
			"|",
			"~",
			"`",
			"!",
			"{",
			"}",
			chr( 0 ),
		),
		'',
		$directory
	);
}