PHP 7.0.6 Released

    Predefined Constants

    The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

    GD_VERSION (string)
    The GD version PHP was compiled against. (Available as of PHP 5.2.4)
    GD_MAJOR_VERSION (integer)
    The GD major version PHP was compiled against. (Available as of PHP 5.2.4)
    GD_MINOR_VERSION (integer)
    The GD minor version PHP was compiled against. (Available as of PHP 5.2.4)
    GD_RELEASE_VERSION (integer)
    The GD release version PHP was compiled against. (Available as of PHP 5.2.4)
    GD_EXTRA_VERSION (string)
    The GD "extra" version (beta/rc..) PHP was compiled against. (Available as of PHP 5.2.4)
    GD_BUNDLED (integer)
    When the bundled version of GD is used this is 1 otherwise its set to 0.
    IMG_GIF (integer)
    Used as a return value by imagetypes()
    IMG_JPG (integer)
    Used as a return value by imagetypes()
    IMG_JPEG (integer)
    Used as a return value by imagetypes()

    Note:

    This constant has the same value as IMG_JPG

    IMG_PNG (integer)
    Used as a return value by imagetypes()
    IMG_WBMP (integer)
    Used as a return value by imagetypes()
    IMG_XPM (integer)
    Used as a return value by imagetypes()
    IMG_COLOR_TILED (integer)
    Special color option which can be used in stead of color allocated with imagecolorallocate() or imagecolorallocatealpha()
    IMG_COLOR_STYLED (integer)
    Special color option which can be used in stead of color allocated with imagecolorallocate() or imagecolorallocatealpha()
    IMG_COLOR_BRUSHED (integer)
    Special color option which can be used in stead of color allocated with imagecolorallocate() or imagecolorallocatealpha()
    IMG_COLOR_STYLEDBRUSHED (integer)
    Special color option which can be used in stead of color allocated with imagecolorallocate() or imagecolorallocatealpha()
    IMG_COLOR_TRANSPARENT (integer)
    Special color option which can be used in stead of color allocated with imagecolorallocate() or imagecolorallocatealpha()
    IMG_ARC_ROUNDED (integer)
    A style constant used by the imagefilledarc() function.

    Note:

    This constant has the same value as IMG_ARC_PIE

    IMG_ARC_PIE (integer)
    A style constant used by the imagefilledarc() function.
    IMG_ARC_CHORD (integer)
    A style constant used by the imagefilledarc() function.
    IMG_ARC_NOFILL (integer)
    A style constant used by the imagefilledarc() function.
    IMG_ARC_EDGED (integer)
    A style constant used by the imagefilledarc() function.
    IMG_GD2_RAW (integer)
    A type constant used by the imagegd2() function.
    IMG_GD2_COMPRESSED (integer)
    A type constant used by the imagegd2() function.
    IMG_EFFECT_REPLACE (integer)
    Alpha blending effect used by the imagelayereffect() function.
    IMG_EFFECT_ALPHABLEND (integer)
    Alpha blending effect used by the imagelayereffect() function.
    IMG_EFFECT_NORMAL (integer)
    Alpha blending effect used by the imagelayereffect() function.
    IMG_EFFECT_OVERLAY (integer)
    Alpha blending effect used by the imagelayereffect() function.
    IMG_FILTER_NEGATE (integer)
    Special GD filter used by the imagefilter() function.
    IMG_FILTER_GRAYSCALE (integer)
    Special GD filter used by the imagefilter() function.
    IMG_FILTER_BRIGHTNESS (integer)
    Special GD filter used by the imagefilter() function.
    IMG_FILTER_CONTRAST (integer)
    Special GD filter used by the imagefilter() function.
    IMG_FILTER_COLORIZE (integer)
    Special GD filter used by the imagefilter() function.
    IMG_FILTER_EDGEDETECT (integer)
    Special GD filter used by the imagefilter() function.
    IMG_FILTER_GAUSSIAN_BLUR (integer)
    Special GD filter used by the imagefilter() function.
    IMG_FILTER_SELECTIVE_BLUR (integer)
    Special GD filter used by the imagefilter() function.
    IMG_FILTER_EMBOSS (integer)
    Special GD filter used by the imagefilter() function.
    IMG_FILTER_MEAN_REMOVAL (integer)
    Special GD filter used by the imagefilter() function.
    IMG_FILTER_SMOOTH (integer)
    Special GD filter used by the imagefilter() function.
    IMG_FILTER_PIXELATE (integer)
    Special GD filter used by the imagefilter() function. (Available as of PHP 5.3.0)
    IMAGETYPE_GIF (integer)
    Image type constant used by the image_type_to_mime_type() and image_type_to_extension() functions.
    IMAGETYPE_JPEG (integer)
    Image type constant used by the image_type_to_mime_type() and image_type_to_extension() functions.
    IMAGETYPE_JPEG2000 (integer)
    Image type constant used by the image_type_to_mime_type() and image_type_to_extension() functions.
    IMAGETYPE_PNG (integer)
    Image type constant used by the image_type_to_mime_type() and image_type_to_extension() functions.
    IMAGETYPE_SWF (integer)
    Image type constant used by the image_type_to_mime_type() and image_type_to_extension() functions.
    IMAGETYPE_PSD (integer)
    Image type constant used by the image_type_to_mime_type() and image_type_to_extension() functions.
    IMAGETYPE_BMP (integer)
    Image type constant used by the image_type_to_mime_type() and image_type_to_extension() functions.
    IMAGETYPE_WBMP (integer)
    Image type constant used by the image_type_to_mime_type() and image_type_to_extension() functions.
    IMAGETYPE_XBM (integer)
    Image type constant used by the image_type_to_mime_type() and image_type_to_extension() functions.
    IMAGETYPE_TIFF_II (integer)
    Image type constant used by the image_type_to_mime_type() and image_type_to_extension() functions.
    IMAGETYPE_TIFF_MM (integer)
    Image type constant used by the image_type_to_mime_type() and image_type_to_extension() functions.
    IMAGETYPE_IFF (integer)
    Image type constant used by the image_type_to_mime_type() and image_type_to_extension() functions.
    IMAGETYPE_JB2 (integer)
    Image type constant used by the image_type_to_mime_type() and image_type_to_extension() functions.
    IMAGETYPE_JPC (integer)
    Image type constant used by the image_type_to_mime_type() and image_type_to_extension() functions.
    IMAGETYPE_JP2 (integer)
    Image type constant used by the image_type_to_mime_type() and image_type_to_extension() functions.
    IMAGETYPE_JPX (integer)
    Image type constant used by the image_type_to_mime_type() and image_type_to_extension() functions.
    IMAGETYPE_SWC (integer)
    Image type constant used by the image_type_to_mime_type() and image_type_to_extension() functions.
    IMAGETYPE_ICO (integer)
    Image type constant used by the image_type_to_mime_type() and image_type_to_extension() functions. (Available as of PHP 5.3.0)
    PNG_NO_FILTER (integer)
    A special PNG filter, used by the imagepng() function.
    PNG_FILTER_NONE (integer)
    A special PNG filter, used by the imagepng() function.
    PNG_FILTER_SUB (integer)
    A special PNG filter, used by the imagepng() function.
    PNG_FILTER_UP (integer)
    A special PNG filter, used by the imagepng() function.
    PNG_FILTER_AVG (integer)
    A special PNG filter, used by the imagepng() function.
    PNG_FILTER_PAETH (integer)
    A special PNG filter, used by the imagepng() function.
    PNG_ALL_FILTERS (integer)
    A special PNG filter, used by the imagepng() function.
    IMG_FLIP_VERTICAL (int)
    Used together with imageflip(), available as of PHP 5.5.0.
    IMG_FLIP_HORIZONTAL (int)
    Used together with imageflip(), available as of PHP 5.5.0.
    IMG_FLIP_BOTH (int)
    Used together with imageflip(), available as of PHP 5.5.0.
    IMG_BELL (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_BESSEL (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_BILINEAR_FIXED (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_BICUBIC (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_BICUBIC (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_BLACKMAN (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_BOX (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_BSPLINE (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_CATMULLROM (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_GAUSSIAN (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_GENERALIZED_CUBIC (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_HERMITE (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_HAMMING (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_HANNING (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_MITCHELL (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_POWER (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_QUADRATIC (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_SINC (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_NEAREST_NEIGHBOUR (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_WEIGHTED4 (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.
    IMG_TRIANGLE (int)
    Used together with imagesetinterpolation(), available as of PHP 5.5.0.

    User Contributed Notes

    webmaster at alexventure dot com
    4 years ago
    In case anyone is wondering what these filters are for, have a look at the W3C's specification:

    http://www.w3.org/TR/PNG-Filters.html
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