_flip_image_resource() │ WP 2.9.0

Deprecated since 3.5.0. It is no longer supported and may be removed in future releases. Use WP_Image_Editor::flip() instead.

Flips an image resource. Internal use only.

Internal function — this function is designed to be used by the kernel itself. It is not recommended to use this function in your code.

No Hooks.

Returns

resource|GdImage. (maybe) flipped image resource or GdImage instance.

Usage

_flip_image_resource( $img, $horz, $vert );

$img(resource|GdImage) (required): Image resource or GdImage instance.
$horz(true|false) (required): Whether to flip horizontally.
$vert(true|false) (required): Whether to flip vertically.

Notes

See: WP_Image_Editor::flip()

Changelog

Since 2.9.0	Introduced.
Deprecated since 3.5.0	Use WP_Image_Editor::flip()

`_flip_image_resource() flip image resource` code ^{WP 7.0}

wp-admin/includes/image-edit.php

function _flip_image_resource( $img, $horz, $vert ) {
	_deprecated_function( __FUNCTION__, '3.5.0', 'WP_Image_Editor::flip()' );

	$w   = imagesx( $img );
	$h   = imagesy( $img );
	$dst = wp_imagecreatetruecolor( $w, $h );

	if ( is_gd_image( $dst ) ) {
		$sx = $vert ? ( $w - 1 ) : 0;
		$sy = $horz ? ( $h - 1 ) : 0;
		$sw = $vert ? -$w : $w;
		$sh = $horz ? -$h : $h;

		if ( imagecopyresampled( $dst, $img, 0, 0, $sx, $sy, $w, $h, $sw, $sh ) ) {
			if ( PHP_VERSION_ID < 80000 ) { // imagedestroy() has no effect as of PHP 8.0.
				imagedestroy( $img );
			}

			$img = $dst;
		}
	}

	return $img;
}