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imageinterlace

(PHP 4, PHP 5, PHP 7, PHP 8)

imageinterlace — Enable or disable interlace

Descrizione

imageinterlace(GdImage $image, ?bool $enable = null): bool

imageinterlace() turns the interlace bit on or off.

If the interlace bit is set and the image is used as a JPEG image, the image is created as a progressive JPEG.

Elenco dei parametri

image

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

enable

If true, the image will be interlaced, if false the interlace bit is turned off. Passing null will result in the interlacing behavior not being changed.

Valori restituiti

Returns true if the interlace bit is set for the image, false otherwise.

Log delle modifiche

Versione Descrizione
8.0.5 imageinterlace() returns a bool now; previously it returned an int (non-zero for interlaced images, zero otherwise).
8.0.0 image expects a GdImage instance now; previously, a valid gd resource was expected.
8.0.0 enable expects a bool now; previously it expected an int.

Esempi

Example #1 Turn on interlacing using imageinterlace()

<?php
// Create an image instance
$im = imagecreatefromgif('php.gif');

// Enable interlancing
imageinterlace($im, true);

// Save the interlaced image
imagegif($im, './php_interlaced.gif');
?>