No cache version.


Caching disabled. Default setting for this page:enabled (code LNG204)
If the display is too slow, you can disable the user mode to view the cached version.

Rechercher une fonction PHP

imagepng

Contents

(PHP 4, PHP 5, PHP 7)

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

Description

imagepng ( resource $image [, mixed $to = NULL [, int $quality = -1 [, int $filters = -1 ]]] ) : bool

Outputs or saves a PNG image from the given image.

PHP: imagepng - Manual Home of Manuel PHP  Contents Haut

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:

NULL is invalid if the quality and filters arguments are not used.

quality

Compression level: from 0 (no compression) to 9. The default (-1) uses the zlib compression default. 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_FILTER or PNG_ALL_FILTERS may also be used to respectively disable or activate all filters. The default value (-1) disables filtering.

Caution

The filters parameter is ignored by system libgd.

PHP: imagepng - Manual Home of Manuel PHP  Contents Haut

Return Values

Returns TRUE on success or FALSE on failure.

Caution

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

PHP: imagepng - Manual Home of Manuel PHP  Contents Haut

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.

PHP: imagepng - Manual Home of Manuel PHP  Contents Haut

Examples

<?php
$im = imagecreatefrompng("test.png");

header('Content-Type: image/png');

imagepng($im);
imagedestroy($im);
?>

PHP: imagepng - Manual Home of Manuel PHP  Contents Haut

See Also

Find a PHP function

English translation

You have asked to visit this site in English. For now, only the interface is translated, but not all the content yet.

If you want to help me in translations, your contribution is welcome. All you need to do is register on the site, and send me a message asking me to add you to the group of translators, which will give you the opportunity to translate the pages you want. A link at the bottom of each translated page indicates that you are the translator, and has a link to your profile.

Thank you in advance.

Document created the 30/01/2003, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/php-rf-imagepng.html

The infobrol is a personal site whose content is my sole responsibility. The text is available under CreativeCommons license (BY-NC-SA). More info on the terms of use and the author.

References

  1. View the html document Language of the document:fr Manuel PHP : http://php.net

These references and links indicate documents consulted during the writing of this page, or which may provide additional information, but the authors of these sources can not be held responsible for the content of this page.
The author This site is solely responsible for the way in which the various concepts, and the freedoms that are taken with the reference works, are presented here. Remember that you must cross multiple source information to reduce the risk of errors.

Contents Haut