imagepalettetotruecolor
imagepolygon
GD and Image Functions
PHP Manual

# imagepng

(PHP 4, PHP 5)

imagepng — Output a PNG image to either the browser or a file

### Description

bool imagepng ( resource `$image` [, string `$filename` [, 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().

`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.

`quality`

  Compression level: from 0 (no compression) to 9.

`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() - 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

imagepalettetotruecolor
imagepolygon
GD and Image Functions
PHP Manual