imagegif

PHP 4, PHP 5, PHP 7, PHP 8
imagegif - Output image to browser or file
Manual
Code Examples

imagegif( GdImage$image, [resource|string|null$file = null] ): bool

imagegif creates the GIF file in file 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

A GdImage object, returned by one of the image creation functions, such as imagecreatetruecolor.

file

The path or an open stream resource (which is automatically closed after this function returns) to save the file to. If not set or null, the raw image stream will be output directly.

Return Values

Returns true on success or false on failure.

Caution:

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

Notes

Note:

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(100100);

// 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($imNULL100);
}
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:

You can use the function imagetypes 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. */
}
?>

Changelog

Version Description
8.0.0 image expects a GdImage instance now; previously, a resource was expected.

Related Functions

Example of imagegif

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Function imagegif:

Image Processing and GD Functions

Most used PHP functions