Manual de PHP
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imagepng

(PHP 3>= 3.0.13, PHP 4 , PHP 5)

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

Description

bool imagepng ( resource image [, string filename])

The imagepng() outputs a GD image stream (image) in PNG format to standard output (usually the browser) or, if a filename is given by the filename it outputs the image to the file.

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

See also imagegif(), imagewbmp(), imagejpeg(), imagetypes().

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