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Generates an SHA-256 message digest ()
string Imagick::getImageSignature ( )


This function is currently not documented; only the argument list is available.


This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change without notice in a future release of PHP. Use this function at your own risk.

Generates an SHA-256 message digest for the image pixel stream.


Return Values

Returns a string containing the SHA-256 hash of the file, throwing an ImagickException on error.