设置或添加关联数组的数值的简短方法？

Question

Is there a shorter way to accomplish the following?

<?php
    $arr = [];

    // ...

    if(isset($arr['key']))
        $arr['key'] += 10;
    else
        $arr['key'] = 10;
?>

Answer 1

Use the ternary operator:Try it

<?php
$arr = [];
// ...
$arr['key']= isset($arr['key'])?($arr['key']+10):10;