Imagick::getImageSignature
(PECL imagick 2, PECL imagick 3)
Imagick::getImageSignature — Generates an SHA-256 message digest
Description
public Imagick::getImageSignature ( ) : string
Generates an SHA-256 message digest for the image pixel stream.
Return Values
Returns a string containing the SHA-256 hash of the file.
Errors/Exceptions
Throws ImagickException on error.
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https://www.php.net/manual/en/imagick.getimagesignature.php