1 files changed, 69 insertions, 0 deletions
diff --git a/plugins/wordpress-importer/compat.php b/plugins/wordpress-importer/compat.php
new file mode 100644
index 00000000..22ebc4ed
--- /dev/null
+++ b/plugins/wordpress-importer/compat.php
@@ -0,0 +1,69 @@
+<?php
+/**
+ * Implementation for WordPress functions missing in older WordPress versions.
+ *
+ * @package WordPress
+ * @subpackage Importer
+ */
+
+if ( ! function_exists( 'wp_slash_strings_only' ) ) {
+	/**
+	 * Adds slashes to only string values in an array of values.
+	 *
+	 * Compat for WordPress < 5.3.0.
+	 *
+	 * @since 0.7.0
+	 *
+	 * @param mixed $value Scalar or array of scalars.
+	 * @return mixed Slashes $value
+	 */
+	function wp_slash_strings_only( $value ) {
+		return map_deep( $value, 'addslashes_strings_only' );
+	}
+}
+
+if ( ! function_exists( 'addslashes_strings_only' ) ) {
+	/**
+	 * Adds slashes only if the provided value is a string.
+	 *
+	 * Compat for WordPress < 5.3.0.
+	 *
+	 * @since 0.7.0
+	 *
+	 * @param mixed $value
+	 * @return mixed
+	 */
+	function addslashes_strings_only( $value ) {
+		return is_string( $value ) ? addslashes( $value ) : $value;
+	}
+}
+
+if ( ! function_exists( 'map_deep' ) ) {
+	/**
+	 * Maps a function to all non-iterable elements of an array or an object.
+	 *
+	 * Compat for WordPress < 4.4.0.
+	 *
+	 * @since 0.7.0
+	 *
+	 * @param mixed    $value    The array, object, or scalar.
+	 * @param callable $callback The function to map onto $value.
+	 * @return mixed The value with the callback applied to all non-arrays and non-objects inside it.
+	 */
+	function map_deep( $value, $callback ) {
+		if ( is_array( $value ) ) {
+			foreach ( $value as $index => $item ) {
+				$value[ $index ] = map_deep( $item, $callback );
+			}
+		} elseif ( is_object( $value ) ) {
+			$object_vars = get_object_vars( $value );
+			foreach ( $object_vars as $property_name => $property_value ) {
+				$value->$property_name = map_deep( $property_value, $callback );
+			}
+		} else {
+			$value = call_user_func( $callback, $value );
+		}
+
+		return $value;
+	}
+}