Zend
200-530 · Question #68
Which is the most efficient way to determine if a key is present in an array, assuming the array has no NULL values?
Sign in or unlock 200-530 to reveal the answer and full explanation for question #68. The question stem and answer options stay visible for context.
Question
Which is the most efficient way to determine if a key is present in an array, assuming the array has no NULL values?
Options
- Ain_array('key', array_keys($a))
- Bisset($a['key'])
- Carray_key_exists('key', $a)
- DNone of the above
Unlock 200-530 to see the answer
You've previewed enough free 200-530 questions. Unlock 200-530 for full answers, explanations, the timed quiz mode, progress tracking, and the master PDF. Question stem and options stay visible so you can still see what's on the exam.