This method can be used to query image width, height, size, and
format without reading the whole image to memory.
This method is available if Imagick has been compiled against ImageMagick version 6.2.9 or newer.
Parameters
filehandle
An open filehandle to the image.
fileName
Optional filename for this image.
Return Values
Returns TRUE on success.
Examples
Example #1 Using Imagick::pingImageFile
Opening a remote location
<?php /* fopen a remote location */ $fp = fopen("http://example.com/test.jpg");
/* create new imagick object */ $im = new Imagick();
/* pass the handle to imagick */ $im->pingImageFile($fp); ?>