Question

php if 一句话简写如何写？

if(isset($_GET['id'])){
$id = $_GET['id'];
}else{
$id = 0;
}

Answer 1

$id= isset($_GET['id'])?$_GET['id']:0;

Answer 2

$id = isset($_GET['id']) ? $_GET['id'] : 0;
PHP7+:
$id = $_GET['id'] ?? 0;