IMAGEPNG(3) 1 IMAGEPNG(3)
imagepng - Output a PNG image to either the browser or a file
SYNOPSIS
bool imagepng (resource $image, [string $filename], [int $quality], [int $filters])
DESCRIPTION
Outputs or saves a PNG image from the given $image.
PARAMETERS
o $
image -An image resource, returned by one of the image creation functions, such as imagecreatetruecolor(3).
o $filename
-The path to save the file to. If not set or NULL, the raw image stream will be outputted directly.
Note
NULL is invalid if the $quality and $filters arguments are not used.
o $quality
- Compression level: from 0 (no compression) to 9.
o $filters
- Allows reducing the PNG file size. It is a bitmask field which may be set to any combination of the PNG_FILTER_XXX constants.
PNG_NO_FILTER or PNG_ALL_FILTERS may also be used to respectively disable or activate all filters.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
CHANGELOG
+--------+--------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+--------------------------------+
| 5.1.3 | |
| | |
| | Added the $filters parameter. |
| | |
| 5.1.2 | |
| | |
| | Added the $quality parameter. |
| | |
+--------+--------------------------------+
EXAMPLES
<?php
$im = imagecreatefrompng("test.png");
header('Content-Type: image/png');
imagepng($im);
imagedestroy($im);
?>
SEE ALSO
imagegif(3), imagewbmp(3), imagejpeg(3), imagetypes(3), imagesavealpha(3).
PHP Documentation Group IMAGEPNG(3)
