Imagick::getImageSignature
(PECL imagick 2.0.0)
Imagick::getImageSignature — Generates an SHA-256 message digest
说明
Imagick::getImageSignature
( void
) : string
Generates an SHA-256 message digest for the image pixel stream.
返回值
Returns a string containing the SHA-256 hash of the file.
错误／异常
错误时抛出 ImagickException。