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imagepng

(PHP 4, PHP 5)

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

Descrizione

bool imagepng ( resource $image [, string $filename [, int $quality [, int $filters ]]] )

Outputs or saves a PNG image from the given image .

Elenco dei parametri

image

Una risorsa immagine, restituita da una delle funzioni di creazione immagine, come imagecreatetruecolor().

filename

The path to save the file to. If not set or NULL, the raw image stream will be outputted directly.

Nota: 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.

Valori restituiti

Restituisce TRUE in caso di successo, FALSE in caso di fallimento.

Log delle modifiche

Versione Descrizione
5.1.3 Added the filters parameter.
5.1.2 Added the quality parameter.

Esempi

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