Ticket #23895: 23895.3.patch

src/wp-includes/media.php

@@ -2602 +2602 @@
 /**
  * Determines the maximum upload size allowed in php.ini.
  *
+ * The optional arguments should be supplied only for testing
+ * the function.
+ *
  * @since 2.5.0
+ * @since 4.4.0 Introduced the `$upl_max_filesize_bytes` and `$post_max_size_bytes` parameters.
  *
+ * @param int $upl_max_filesize_bytes A value for upload_max_filesize.
+ * @param int $post_max_size_bytes A value for post_max_size.
+ *
  * @return int Allowed upload size.
  */
-function wp_max_upload_size() {
-        $u_bytes = wp_convert_hr_to_bytes( ini_get( 'upload_max_filesize' ) );
-        $p_bytes = wp_convert_hr_to_bytes( ini_get( 'post_max_size' ) );
+function wp_max_upload_size( $upl_max_filesize_bytes = null, $post_max_size_bytes = null ) {
 
         /**
+         * Initialize the values, if none are provided by the tests.
+         */
+        if ( is_null( $upl_max_filesize_bytes ) ) {
+                $upl_max_filesize_bytes = wp_convert_hr_to_bytes( ini_get( 'upload_max_filesize' ) );
+        }
+
+        if ( is_null( $post_max_size_bytes ) ) {
+                $post_max_size_bytes = wp_convert_hr_to_bytes( ini_get( 'post_max_size' ) );
+        }
+
+        /**
+         * Get an accurate max upload size.
+         *
+         * If one of the limits is set to 0, but the other one isn't
+         * this value will be wrong.
+         * PHP treats 0 values as "unlimited", so actually the limit
+         * is the larger value in this case.
+         *
+         * This is handled here, to make sure the proper limit is returned.
+     *
+     */
+
+        // get the lower limit
+        $upload_size_limit_bytes = min( $upl_max_filesize_bytes, $post_max_size_bytes );
+
+        // if the limit is 0, make sure to get the correct one
+        if ( 0 ===  $upload_size_limit_bytes ) {
+                $upload_size_limit_bytes = max( $upl_max_filesize_bytes, $post_max_size_bytes );
+        }
+
+        /**
          * Filter the maximum upload size allowed in php.ini.
          *
          * @since 2.5.0
          *
          * @param int $size    Max upload size limit in bytes.
-         * @param int $u_bytes Maximum upload filesize in bytes.
-         * @param int $p_bytes Maximum size of POST data in bytes.
+         * @param int $upl_max_filesize_bytes Maximum upload filesize in bytes.
+         * @param int $post_max_size_bytes Maximum size of POST data in bytes.
          */
-        return apply_filters( 'upload_size_limit', min( $u_bytes, $p_bytes ), $u_bytes, $p_bytes );
+        return apply_filters( 'upload_size_limit', $upload_size_limit_bytes, $upl_max_filesize_bytes, $post_max_size_bytes );
 }
 
 /**