is_gd_image() WordPress Function
The is_gd_image() function is used to check if a given image is a valid GD image.
is_gd_image( resource|GdImage|false $image ) #
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
function is_gd_image( $image ) {
if ( is_resource( $image ) && 'gd' === get_resource_type( $image )
|| is_object( $image ) && $image instanceof GdImage
) {
return true;
}
return false;
}
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Changelog
| Version | Description |
|---|---|
| 5.6.0 | Introduced. |