imagepng
imagepng
(PHP 4, PHP 5, PHP 7)
imagepng — Output a PNG image to either the browser or a file
Description
bool imagepng ( resource $image [, mixed $to [, int $quality [, int $filters ]]] )
Outputs or saves a PNG image from the given image.
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.Note:
NULLis invalid if thequalityandfiltersarguments are not used. -
quality -
Compression level: from 0 (no compression) to 9. The current default is 6. For more information see the » zlib manual.
-
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_FILTERorPNG_ALL_FILTERSmay also be used to respectively disable or activate all filters.
Return Values
Returns TRUE on success or FALSE on failure.
Changelog
| Version | Description |
|---|---|
| 5.4.0 | Added support for passing a stream resource to to. |
| 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() - Output image to browser or 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
- imagesavealpha() - Set the flag to save full alpha channel information (as opposed to single-color transparency) when saving PNG images
© 1997–2017 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://secure.php.net/manual/en/function.imagepng.php
