imagecolorsforindex
(PHP 4, PHP 5)
imagecolorsforindex — Get the colors for an index
說明
array imagecolorsforindex
( resource $image
, int $index
)
Gets the color for a specified index.
參數
- image
-
An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
- index
-
Return值
Returns an associative array with red, green, blue and alpha keys that contain the appropriate values for the specified color index.
範例
Example#1 imagecolorsforindex() example
<?php
// open an image
$im = imagecreatefrompng('nexen.png');
// get a color
$start_x = 40;
$start_y = 50;
$color_index = imagecolorat($im, $start_x, $start_y);
// make it human readable
$color_tran = imagecolorsforindex($im, $color_index);
// what is it ?
print_r($color_tran);
?>
上例的輸出類似於：
Array ( [red] => 226 [green] => 222 [blue] => 252 [alpha] => 0 )