1.Write a PHP script to swap two numbers


   < ? php  
    $a = 45;  
    $b = 78; 

    echo "Befor swapping:<br><br>";  
    echo "a =".$a."  b=".$b;  
    // Swapping Logic  
    $third = $a;  
    $a = $b;  
    $b = $third;  
    echo "<br><br>After swapping:<br><br>";  
    echo "a =".$a."  b=".$b;  
    ? >