Which symbol is used in PHP to separate elements in a print statement?

Which method scope prevents a method from being overridden by a subclass?

 How many functions does PHP offer for searching and modifying strings using Perl-compatible regular expressions. 

  If your object must inherit behavior from a number of sources you must use a/an 

Which symbol should be used to print a string that includes double-quotes inside double-quotes?

Which PHP directive determines how the session information will be stored?

Which of the following is/are considered external data in web applications?

Which of the following can be used to instantiate an object of the class 'Fast' in PHP?

What will be the output of the following PHP code?

<?php

$op2 = "blabla";

function foo($op1)

{

echo $op1;

echo $op2;

}

foo("hello");

?>

 Which of the following statements is used to add an attachment to the mail?