What is the time complexity of a call to array_key_exists()?

What data types cannot be used with PHP5 Type Hinting?

Which superglobals doesn't contain data from the client?

Function to convert data into a binary string according to a specified format?

PHP function to get information about the current session cookie?

Within the eval() function, code must be opened and closed with PHP tags, i.e.

What is the output?

Which is not a valid Xdebug configuration setting?

Which will read an object into an array variable?

Which code snippet outputs a random string?

What is wrong with code? curl_setopt($ch, CURLOPT_URL, 'http://www.example.com/'); curl_setopt($ch, CURLOPT_HEADER, 0); curl_exec($ch); curl_close($ch); ?>