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(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);
?>

Related Function(s)

imagegif()

imagewbmp()

imagejpeg()

imagetypes()