In PHP 7.1, which of the following is the correct syntax for a function with iterable generator return type?

Under which scenario, a TypeError may be thrown? i) When the argument type, which is being passed to a function, does not match its corresponding declared parameter type. ii) When the returned value from a function does not match the declared function return type. iii) When an invalid number of arguments are passed to a built-in PHP function.

Find the output of the following PHP code. $string = echo 'The output for '$string' is '$string[-1]'.\n'; ?>

While creating or modifying an array in PHP 7.1, what will happen if an empty index operator is applied on a string?

Correct syntax of the is_iterable() function, which is used to verify whether or not the content of a variable is an iterable value?

A fatal error would be caught by

Which function would you use to append one or more elements to the end of the array?

One can include ('abc.PHP') two times in a PHP page 'makeit.PHP'.

If regular expressions must be used, in general which type of regular expression functions available to PHP is preferred for performance reasons?

What operator is used to test if two values are identical in every way