尝试获取非对象的属性,以及类似的错误-性能命中?

error_reporting

error_reporting(0);

@

@$my_array['a'];

isset()

if (isset($my_array['a'])) {
    $my_array['a'];
}

a quick benchmarking script

Turning off error reporting:  6 seconds
Using error suppression:     18 seconds
Using isset():                9 seconds

isset()

@ take a look here in case you don't know what @ is

take a look here