How many validation filters like FILTER_VALIDATE_EMAIL are currently available? 

What will be the output of the following code?

  <?php

    echo ord ("hello");

  ?>

 What is the description of Error level E_ERROR? 

 What is the default number of seconds that cached session pages are made available before the new pages are created?

Which PHP function is used to perform a find and replace operation on a string or an array?

Which of the following signifies that the value of a variable is a string?

 What will be the output of the following PHP code? 

<?php

$op2 = "blabla";

function foo($op1)

{

echo $op1;

echo $op2;

}

   foo("hello");

?>

  If the format is F then which one of the following will be returned? 

Which one of the following function is used to return an array consisting of various DNS resource records pertinent to a specific domain?
 

 Which one of the following does not describe a validating filter?