Php/docs/imagick.getimagesignature
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Imagick::getImageSignature
(PECL imagick 2, PECL imagick 3)
Imagick::getImageSignature — Generates an SHA-256 message digest
说明
public Imagick::getImageSignature ( ) : 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。