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Imagick::writeImageFile — Writes an image to a filehandle
$filehandle
[, string $format
] ) : boolWrites the image sequence to an open filehandle. The handle must be opened with for example fopen. This method is available if Imagick has been compiled against ImageMagick version 6.3.6 or newer.
filehandle
Filehandle where to write the image
Returns TRUE
on success.