What is the use of the @ symbol in front of a variable?

Best method for sanitizing user input with PHP?

Method to capture the whole screen in PHP?

Which would trigger the browser's 'Save As' prompt?

Which method is used to check if an array is associative or numeric?

What will be the output?

Which type of error can NOT be caught with a custom error handler?

Which protocol is not supported by PHP streams?

Which function returns an item from the argument list?

Which will split a string into an array with 3 elements?

What does this display? 1, 'b'=>2, 'c'=>3); echo key($x);