Which of the following is the correct magical PHP constant that is used to determine the current line number of a file?

Find the output of the following PHP 7.1 code. var_dump(round(35/6)); ?>

Output will be? $o = (object) array( var_dump(isset($o-> {'5'})); var_dump(key($o)); ?>

Which can be used as a default value for parameters that are declared as iterable?

Which is NOT correct about PHP 7.1 variables?

In the following PHP 7.1 code snippet, commenting or removing which code line will result in the successful compilation of the code? 1. 2. namespace X\Y\Z; 3. class Exception extends \Exception {} 4. $x = new Exception() 5. $y = new \Exception('hi'); 6. $z = new ArrayObject; 7. ?>

Which of the following responsible for generates the backtrace

The ______ keyword is used to indicate an incomplete class or method, which must be further extended and/or implemented in order to be used.

What is the name of the function to check that the variable type is an object?

Which of the following is not related to file

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