Question

php如何改变数组key，根据条件

Array
(
[1] => one
[2] => two
[3] => three
)
如何改变为
Array
(
[ a1] => one
[a2] => two
[a3] => three
)
让数组的key以字母开头，这样怎么实现，求高人解决。项目需要。

Answer 1

foreach($a as $key=>$value){
$b[('a'.$key)]=$a[$key];
}