(PECL imagick 2, PECL imagick 3)
ImagickPixelIterator::getPreviousIteratorRow — Returns the previous row
本函數還未編寫(xiě)文檔，僅有參數列表。
Returns the previous row as an array of pixel wands from the pixel iterator.
Returns the previous row as an array of ImagickPixelWand objects from the ImagickPixelIterator, throwing ImagickPixelIteratorException on error.