(PHP 3 <= 3.0.18, PHP 4 >= 4.0.0)

ImageInterlace -- Enable or disable interlace


int imageinterlace (int im [, int interlace])

ImageInterlace() turns the interlace bit on or off. If interlace is 1 the im image will be interlaced, and if interlace is 0 the interlace bit is turned off.

If the interlace bit is set and the image is used as a JPEG image, the image is created as a progressive JPEG.

This function returns whether the interlace bit is set for the image.