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    Logical operators: They are used to combine multiple conditions and evaluate them. They
                         return a Boolean value 'True' or 'False' as output. Logical operators of PHP are AND(&&), OR (||),
                         XOR(^), NOT(!). Let us create a PHP script to use some of the logical operators.

                        <HTML>
                        <HEAD> <TITLE> Using Variables </TITLE> </HEAD>

                        <BODY>

                        <?php

                        $a = true;

                        $b = false;

                        echo var_dump($a and $b);
                        echo "<br>",var_dump($a or $b);

                        echo "<br>",var_dump($a xor $b);

                        ?>

                        </BODY>

                        </HTML>
                        Note that var_dump() function is used to evaluate the logical operators. We get the following
                         output when executing the preceding script:

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