php 在二维数组中增加一个元素,值为前两个元素的和

Question

$a=array(0=>array("name"=>"a","mail"=>"b"),1=>array("name"=>"d","mail"=>"e"))

怎样可以变成

array(0=>array("name"=>"a","mail"=>"b" tel=>"k"),1=>array("name"=>"d","mail"=>"e" tel=>"e"))

tel建值k=name+mail的值也就是 a+b的和。每个循环里都是

Answer 1

foreach($a as $k => $v){
$a[$k]['tel'] = $v['name'] + $v['mail'];

}本回答被提问者采纳