Popisint 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.
An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
If non-zero, the image will be interlaced, else the interlace bit is turned off.