What is the functions unlink?

.......... Returns the time of sunrise for a given day / location

Which is not valid PHP code?

What's the output? $integer = 5; $string = strval($integer); var_dump($string);

What's the output? $a = (2 == '2') ? true : false; echo $a;

Which array function checks if the specified key exists in the array

Which functions compare the substrings of the parameters?

Which functions set options in curl script?

The contents of an image file are stored in memory as $imString, but the original file is not available. Of the following, which uses the least amount of code and is a valid method of retrieving the dimensions of $imString?

Best way to iterate and modify every element of an array using PHP 5?

How to check if a directory exists?