string(4) "test"
string(9) "other_key"
Notice: Undefined index: 'test' in /in/8nmfS on line 13
NULL
Notice: Undefined index: 'test' in /in/8nmfS on line 14
Notice: Undefined index: 'other_key' in /in/8nmfS on line 13
NULL
Notice: Undefined index: 'other_key' in /in/8nmfS on line 14
Notice: Undefined index: '' in /in/8nmfS on line 13
NULL
Notice: Undefined index: '' in /in/8nmfS on line 14