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<imagecolorsetimagecolorstotal>
Last updated: Mon, 16 Jul 2012

imagecolorsforindex

(PHP 3, PHP 4, PHP 5)

imagecolorsforindex -- 取得某索引的颜色

说明

array imagecolorsforindex ( resource image, int index )

本函数返回一个具有 red,green,blue 和 alpha 的键名的关联数组,包含了指定颜色索引的相应的值。

例子 1. imagecolorsforindex() 例子

<?php

// 打开一幅图像
$im = imagecreatefrompng('nexen.png');

// 取得一点的颜色
$start_x = 40;
$start_y = 50;
$color_index = imagecolorat($im, $start_x, $start_y);

// 使其可读
$color_tran = imagecolorsforindex($im, $color_index);

// 显示该颜色的值
echo '<pre>';
print_r($color_tran);
echo
'</pre>';

?>

本例将输出:

Array
(
    [red] => 226
    [green] => 222
    [blue] => 252
    [alpha] => 0
)

参见 imagecolorat()imagecolorexact()




<imagecolorsetimagecolorstotal>
 Last updated: Mon, 16 Jul 2012
 
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