imageinterlace

(PHP 4, PHP 5)

imageinterlace — Enable or disable interlace

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.

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.

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