Determines whether the value is an acceptable type for GD image functions.
Description
In PHP 8.0, the GD extension uses GdImage objects for its data structures.This function checks if the passed value is either a resource of type gd or a GdImage object instance. Any other type will return false.
Parameters
$image
resource|GdImage|false
Required
A value to check the type for.
Return
bool True if $image is either a GD image resource or GdImage instance, false otherwise.
Source
File: wp-includes/media.php.
View all references
function is_gd_image( $image ) {
if ( is_resource( $image ) && "gd" === get_resource_type( $image )
|| is_object( $image ) && $image instanceof GdImage
) {
return true;
}
return false;
}