feat(Functions): Added request data utils

Request.php

@@ -0,0 +1,76 @@
+<?php //phpcs:disable WordPress.Security.NonceVerification, WordPress.Security.ValidatedSanitizedInput, SlevomatCodingStandard.Operators.SpreadOperatorSpacing.IncorrectSpacesAfterOperator
+
+namespace XWP\Helper\Functions;
+
+/**
+ * Request helper class.
+ */
+final class Request {
+    /**
+     * Clean input data.
+     *
+     * @param  string|array $input The input data.
+     * @return string|array The cleaned input data.
+     */
+    public static function clean( $input ) {
+        return match ( true ) {
+            \is_array( $input )  => \array_map( self::clean( ... ), $input ),
+            \is_scalar( $input ) => \sanitize_text_field( $input ),
+            default              => $input,
+        };
+    }
+
+    /**
+     * Unslash and clean input data.
+     *
+     * @param  string|array $input The input data.
+     * @return string|array The cleaned input data.
+     */
+    public static function uclean( $input ) {
+        return self::clean( \wp_unslash( $input ) );
+    }
+
+    /**
+     * Fetch a variable from the $_GET superglobal.
+     *
+     * @param  string $key The key to fetch.
+     * @param  mixed  $def The default value.
+     * @return mixed The fetched value.
+     */
+    public static function fetch_get_var( $key, $def = null ) {
+        return self::fetch_var( $_GET[ $key ], $def );
+    }
+
+    /**
+     * Fetch a variable from the $_POST superglobal.
+     *
+     * @param  string $key The key to fetch.
+     * @param  mixed  $def The default value.
+     * @return mixed The fetched value.
+     */
+    public static function fetch_post_var( $key, $def = null ) {
+        return self::fetch_var( $_POST[ $key ], $def );
+    }
+
+    /**
+     * Fetch a variable from the $_REQUEST superglobal.
+     *
+     * @param  string $key The key to fetch.
+     * @param  mixed  $def The default value.
+     * @return mixed The fetched value.
+     */
+    public static function fetch_req_var( $key, $def = null ) {
+        return self::fetch_var( $_REQUEST[ $key ], $def );
+    }
+
+    /**
+     * Fetch, unslash, and clean a variable.
+     *
+     * @param  string $val Request variable.
+     * @param  mixed  $def The default value.
+     * @return mixed The fetched value.
+     */
+    private static function fetch_var( &$val, $def = null ) {
+        return self::uclean( $val ?? $def );
+    }
+}

xwp-helper-fns.php

@@ -156,3 +156,70 @@ function xwp_remove_hook_callbacks(
         return f\Hook_Remover::remove_callbacks( $classname, $target_hook, $method, $priority );
     }
 endif;
+
+
+
+if ( ! function_exists( 'xwp_clean' ) ) :
+    /**
+     * Clean variables using sanitize_text_field. Arrays are cleaned recursively.
+     * Non-scalar values are ignored.
+     *
+     * @param  string|array $input Data to sanitize.
+     * @return string|array
+     */
+    function xwp_clean( $input ) {
+        return f\Request::clean( $input );
+    }
+endif;
+
+if ( ! function_exists( 'xwp_uclean' ) ) :
+    /**
+     * Unslash then clean variables using sanitize_text_field. Arrays are cleaned recursively.
+     * Non-scalar values are ignored.
+     *
+     * @param  string|array $input Data to sanitize.
+     * @return string|array
+     */
+	function xwp_uclean( $input ) {
+		return f\Request::uclean( $input );
+	}
+endif;
+
+if ( ! function_exists( 'xwp_fetch_get_var' ) ) :
+    /**
+     * Get an item of `GET` data if set, otherwise return a default value.
+     *
+     * @param  string $key GET key.
+     * @param  string $def Default value.
+     * @return mixed  Value sanitized by xwp_uclean.
+     */
+    function xwp_fetch_get_var( $key, $def = null ) {
+        return f\Request::fetch_get_var( $key, $def );
+    }
+endif;
+
+if ( ! function_exists( 'xwp_fetch_post_var' ) ) :
+    /**
+     * Get an item of `POST` data if set, otherwise return a default value.
+     *
+     * @param  string $key  POST key.
+     * @param  string $def  Default value.
+     * @return mixed  Value sanitized by xwp_uclean.
+     */
+    function xwp_fetch_post_var( $key, $def = null ) {
+        return f\Request::fetch_post_var( $key, $def );
+    }
+endif;
+
+if ( ! function_exists( 'xwp_fetch_req_var' ) ) :
+    /**
+     * Get an item of `REQUEST`data if set, otherwise return a default value.
+     *
+     * @param  string $key  REQUEST key.
+     * @param  string $def  Default value.
+     * @return mixed  Value sanitized by xwp_uclean.
+     */
+    function xwp_fetch_req_var( $key, $def = null ) {
+        return f\Request::fetch_req_var( $key, $def );
+    }
+endif;