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Imagick::writeImageFile — Writes an image to a filehandle
$filehandle
)Writes the image sequence to an open filehandle. The handle must be opened with for example fopen. 此方法在Imagick基于ImageMagick 6.3.6以上版本编译时可用。
filehandleFilehandle where to write the image
成功时返回 TRUE。