Imagick
PHP Manual

Imagick::getImageSignature

(PECL imagick 2.0.0)

Imagick::getImageSignatureGenerates an SHA-256 message digest

说明

string Imagick::getImageSignature ( void )

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。


Imagick
PHP Manual