The Imagick class
PHP Manual


(No version information available, might be only in CVS)

Imagick::getImageSignatureGenerates an SHA-256 message digest


string Imagick::getImageSignature ( void )

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

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.

The Imagick class
PHP Manual