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is_gd_image › WordPress Function

Since5.6.0
Deprecatedn/a
› is_gd_image ( $image )
Parameters:
  • (resource|GdImage|false) $image A value to check the type for.
    Required: Yes
Returns:
  • (bool) True if `$image` is either a GD image resource or a GdImage instance, false otherwise.
Defined at:
Codex:

Determines whether the value is an acceptable type for GD image functions.

In PHP 8.0, the GD extension uses GdImage objects for its data structures. This function checks if the passed value is either a GdImage object instance or a resource of type gd. Any other type will return false.


Related Functions: has_header_image, is_time, file_is_valid_image, wp_load_image, is_date

Source 

function is_gd_image( $image ) {
	if ( $image instanceof GdImage
		|| is_resource( $image ) && 'gd' === get_resource_type( $image )
	) {
		return true;
	}

	return false;
}