在同一个数组中使用相同的密钥值

Question

如何正确写入此代码？第四行，我想在同一个数组中使用两个第一个键的值。

$pixel_percents = array(
    "complete"=>.5 * 768, 
    "wip"=>round(.2 * 768, 0, PHP_ROUND_HALF_DOWN), 
    "remain"=>$pixel_percents["complete"] - $pixel_percents["wip"] 
); 

Answer 1

只要做到这一点后

$pixel_percents = array(
    "complete"=>.5 * 768, 
    "wip"=>round(.2 * 768, 0, PHP_ROUND_HALF_DOWN), 
); 
$pixel_percents['remain'] = $pixel_percents['complete'] - $pixel_percents['wip']; 

Answer 2

$pixel_percents = array(); 
$pixel_percents["complete"] = .5 * 768; 
$pixel_percents["wip"] = round(.2 * 768, 0, PHP_ROUND_HALF_DOWN); 
$pixel_percents["remain"] = $pixel_percents["complete"] - $pixel_percents["wip"];