Gmagick::getimagesignature

(PECL gmagick >= Unknown)

Gmagick::getimagesignature — Generates an SHA-256 message digest

public string Gmagick::getimagesignature ( void )

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

此函数没有参数。

Returns a string containing the SHA-256 hash of the file.

错误时抛出GmagickException.