imageinterlace

(PHP 4, PHP 5)

imageinterlace — Enable or disable interlace

Description

int imageinterlace ( resource $image [, int $interlace ] )

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.

Parameters

image

An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

interlace

If non-zero, the image will be interlaced, else the interlace bit is turned off.

Return Values

Returns 1 if the interlace bit is set for the image, 0 otherwise.

Examples

Example #1 Turn on interlancing using imageinterlace()

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

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

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