10. Which among the following is/are not a metacharacter?

The filesize() function returns the file size in _____

Which PHP function is used to determine whether a class exists or not?

Which function is used to read a specific number of characters from a file?

 When you use the $_POST variable to collect data, the data is visible to ___________ 

Which PHP directive sets a maximum allowable amount of memory in megabytes that a script can use?

Which feature allows us to call more than one method or function of the class in single instruction?

To add an attachment to the email, you would use the _________ method.

What is the output of the following PHP code?

<?php

function convertSpace($string)

{

return str_replace("_", " ", $string);

}

$string = "Peter_is_a_great_guy!";

echo filter_var($string, FILTER_CALLBACK, array("options"=>"convertSpace"));

?>