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imagecolorsforindex
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imagecolorsforindex

Name

imagecolorsforindex — Determines the RGB components of a color.

Synopsis

array imagecolorsforindex(image, color); int image: Image identifier int color: Specified color

Returns

Associative array of color components

Description

This function returns the same information as imagecolorat() , imagecolorexact() , and imagecolorclosest() , except that the color information is stored in an array containing three elements. The elements contain the red, green, and blue portions of the image, which can be used in other places. For example, each color value can be converted to a hex value and created as an HTML font color.

Example

Example 401. Display some text in the same color as the image

$im = imagecreatefrompng($uploaded_file);
// get the nearest blue
$blue = imagecolorclosest($im, 0, 0, 255);
$blue_array = imagecolorsforindex($im, $blue);
imagedestroy($im);

while (list($key, $val) = each($blue_array)) {
    $color = dechex($val);
    if ($color == "00") {
        $color = "00";
    }
    $font_color = $font_color . $color;
}
echo "<font color=\"#$font_color\">Image color</font>\n";

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