Php/docs/function.imageinterlace
From Get docs
imageinterlace
(PHP 4, PHP 5, PHP 7)
imageinterlace — Enable 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);?>