(PHP 4, PHP 5, PHP 7) Find out the number of colors in an image's palette int imagecolorstotal ( resource $image ) Returns the number of colors in an image palette. Parameters: image An image resource, returned by one of the image creation functions, such as imagecreatefromgif(). Returns: Returns the number of colors in the specified image's pale

(PHP 4, PHP 5, PHP 7) Get the colors for an index array imagecolorsforindex ( resource $image, int $index ) Gets the color for a specified index. Parameters: image An image resource, returned by one of the image creation functions, such as imagecreatetruecolor(). index The color index. Returns: Returns an associa

(PHP 4, PHP 5, PHP 7) Set the color for the specified palette index void imagecolorset ( resource $image, int $index, int $red, int $green, int $blue [, int $alpha = 0 ] ) This sets the specified index in the palette to the specified color. This is useful for creating flood-fill-like effects in palleted images without the overhead of performing the actual flood-fill. Parameters: ima

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Get the index of the specified color + alpha or its closest possible alternative int imagecolorresolvealpha ( resource $image, int $red, int $green, int $blue, int $alpha ) This function is guaranteed to return a color index for a requested color, either the exact color or the closest possible alternative. Parameters: image An image resour

(PHP 4, PHP 5, PHP 7) Get the index of the specified color or its closest possible alternative int imagecolorresolve ( resource $image, int $red, int $green, int $blue ) This function is guaranteed to return a color index for a requested color, either the exact color or the closest possible alternative. If you created the image from a file, only colors used in the image are resolved. Colors present only in the palette are n

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Makes the colors of the palette version of an image more closely match the true color version bool imagecolormatch ( resource $image1, resource $image2 ) Makes the colors of the palette version of an image more closely match the true color version. Parameters: image1 A truecolor image link resource. image2

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Get the index of the specified color + alpha int imagecolorexactalpha ( resource $image, int $red, int $green, int $blue, int $alpha ) Returns the index of the specified color+alpha in the palette of the image. Parameters: image An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

(PHP 4, PHP 5, PHP 7) Get the index of the specified color int imagecolorexact ( resource $image, int $red, int $green, int $blue ) Returns the index of the specified color in the palette of the image. If you created the image from a file, only colors used in the image are resolved. Colors present only in the palette are not resolved. Parameters: image An image resource, r

(PHP 4, PHP 5, PHP 7) De-allocate a color for an image bool imagecolordeallocate ( resource $image, int $color ) De-allocates a color previously allocated with imagecolorallocate() or imagecolorallocatealpha(). Parameters: image An image resource, returned by one of the image creation functions, such as imagecreatetruecolor(). color The c

(PHP 4 >= 4.0.1, PHP 5, PHP 7) Get the index of the color which has the hue, white and blackness int imagecolorclosesthwb ( resource $image, int $red, int $green, int $blue ) Get the index of the color which has the hue, white and blackness nearest the given color. Parameters: image An image resource, returned by one of the image creation functions, such as imagecreatet