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(PECL imagick 2, PECL imagick 3)
Imagick::getImageChannelDepth — Gets the depth for a particular image channel
$channel): int
Gets the depth for a particular image channel.
channel
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channel constants using bitwise operators. 缺省为Imagick::CHANNEL_DEFAULT.
参考此 通道常数列表
成功时返回 true。
