Php/docs/function.imageinterlace

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imageinterlace

(PHP 4, PHP 5, PHP 7)

imageinterlaceEnable or disable interlace


Description

imageinterlace ( resource $image [, int $interlace = 0 ] ) : int

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 interlacing using imageinterlace()

<?php// Create an image instance$im = imagecreatefromgif('php.gif');// Enable interlancingimageinterlace($im, true);// Save the interlaced imageimagegif($im, './php_interlaced.gif');imagedestroy($im);?>