Output GD2 image to browser or file

Description

bool imagegd2 ( resource $image [, mixed $to = NULL [, int $chunk_size = 128 [, int $type = IMG_GD2_RAW ]]] )

Outputs a GD2 image to the given to.

Parameters

image: An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
to: The path or an open stream resource (which is automatically being closed after this function returns) to save the file to. If not set or NULL, the raw image stream will be outputted directly.
chunk_size: Chunk size.
type: Either IMG_GD2_RAW or IMG_GD2_COMPRESSED. Default is IMG_GD2_RAW.

Return Values

Returns TRUE on success or FALSE on failure.

Caution

However, if libgd fails to output the image, this function returns TRUE.

Changelog

Version	Description
5.4.0	Added support for passing a stream resource to `to`.

Examples

Example #1 Outputting a GD2 image


<?php
// Create a blank image and add some text
$im = imagecreatetruecolor(120, 20);
$text_color = imagecolorallocate($im, 233, 14, 91);
imagestring($im, 1, 5, 5,  "A Simple Text String", $text_color);

// Output the image
imagegd2($im);

// Free up memory
imagedestroy($im);
?>

Example #2 Saving a GD2 image


<?php
// Create a blank image and add some text
$im = imagecreatetruecolor(120, 20);
$text_color = imagecolorallocate($im, 233, 14, 91);
imagestring($im, 1, 5, 5,  "A Simple Text String", $text_color);

// Save the gd2 image
// The file format for GD2 images is .gd2, see http://www.libgd.org/GdFileFormats
imagegd2($im, 'simple.gd2');

// Free up memory
imagedestroy($im);
?>

Notes

Note:
The GD2 format is commonly used to allow fast loading of parts of images. Note that the GD2 format is only usable in GD2-compatible applications.