Imagick::getImageAlphaChannel

    (PECL imagick 2 >= 2.3.0, PECL imagick 3)

    Imagick::getImageAlphaChannel — Checks if the image has an alpha channel

    Description

    publicImagick::getImageAlphaChannel(): bool

    Returns whether the image has an alpha channel.

    Parameters

    This function has no parameters.

    Return Values

    Returns true if the image has an alpha channel value and false if not, i.e. the image is RGB rather than RGBA or CMYK rather than CMYKA.

    Errors/Exceptions

    Throws ImagickException on error.

    Changelog

    VersionDescription
    imagick 3.6.0 Returns a bool now; previously, an int was returned.
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