Output image to browser or file

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imagegrabscreen
GD and Image Functions
PHP Manual

# imagegif

(PHP 4, PHP 5)

imagegif — Output image to browser or file

### Description

bool imagegif ( resource `$image` [, string `$filename` ] )

imagegif() creates the GIF file in filename from the image `image`. The `image` argument is the return from the imagecreate() or imagecreatefrom* function.

The image format will be GIF87a unless the image has been made transparent with imagecolortransparent(), in which case the image format will be GIF89a.

### Parameters

`image`

  An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

`filename`

  The path to save the file to. If not set or `NULL`, the raw image stream will be outputted directly.

### Return Values

Returns `TRUE` on success or `FALSE` on failure.

### Examples

Example #1 Outputting an image using imagegif()

`<?php
// Create a new image instance
$im = imagecreatetruecolor(100, 100);
// Make the background white
imagefilledrectangle($im, 0, 0, 99, 99, 0xFFFFFF);
// Draw a text string on the image
imagestring($im, 3, 40, 20, 'GD Library', 0xFFBA00);
// Output the image to browser
header('Content-type: image/gif');
imagegif($im);
imagedestroy($im);
?>`

Example #2 Converting a PNG image to GIF using imagegif()

`<?php
// Load the PNG
$png = imagecreatefrompng('./php.png');
// Save the image as a GIF
imagegif($png, './php.gif');
// Free from memory
imagedestroy($png);
// We're done
echo 'Converted PNG image to GIF with success!';
?>`

### Notes

> Note: GIF support was removed from the GD library in Version 1.6, and added back in Version 2.0.28. This function is not available between these versions. For more information, see the » GD Project site.
> The following code snippet allows you to write more portable PHP applications by auto-detecting the type of GD support which is available. Replace the sequence header ("Content-type: image/gif"); imagegif ($im); by the more flexible sequence:

> `<?php
> // Create a new image instance
> $im = imagecreatetruecolor(100, 100);
> // Do some image operations here
> // Handle output
> if(function_exists('imagegif'))
> {
> // For GIF
> header('Content-type: image/gif');
> imagegif($im);
> }
> elseif(function_exists('imagejpeg'))
> {
> // For JPEG
> header('Content-type: image/jpeg');
> imagejpeg($im, NULL, 100);
> }
> elseif(function_exists('imagepng'))
> {
> // For PNG
> header('Content-type: image/png');
> imagepng($im);
> }
> elseif(function_exists('imagewbmp'))
> {
> // For WBMP
> header('Content-type: image/vnd.wap.wbmp');
> imagewbmp($im);
> }
> else
> {
> imagedestroy($im);
> die('No image support in this PHP server');
> }
> // If image support was found for one of these
> // formats, then free it from memory
> if($im)
> {
> imagedestroy($im);
> }
> ?>`

> Note: As of PHP 4.0.2 you can use the function imagetypes() in place of function_exists() for checking the presence of the various supported image formats:

> `<?php
> if(imagetypes() & IMG_GIF)
> {
> header('Content-type: image/gif');
> imagegif($im);
> }
> elseif(imagetypes() & IMG_JPG)
> {
> /* ... etc. */
> }
> ?>`

### See Also

- imagepng() - Output a PNG image to either the browser or a file
- imagewbmp() - Output image to browser or file
- imagejpeg() - Output image to browser or file
- imagetypes() - Return the image types supported by this PHP build

imagegd
imagegrabscreen
GD and Image Functions
PHP Manual