详解PHP数组传递是值传递而非引用传递概念

$arr = array(
'name' => 'corn',
'age' => '24',
);
test_arr($arr);
function test_arr($arr){
$arr['name'] = 'qqyumidi';
}
print_r($arr); //result: Array ( [name] => corn [age] => 24 )