Variable Concept in Functions of PHP

Sample 1 : Types of Variables in Functions

Global Variables
Local Variables
Static Static Variables

Sample 2 : Define a function

My name is Samee_Ullah_Feroz
And my age is 22

   <html>  
     <head>  
       <title>Variable Concept in Functions of PHP : 3rd Day Lecture of PHP</title>  
     </head>  
     <body>  
       <h1 align="center">Variable Concept in Functions of PHP </h1>  
            <h2 align="left">Sample 1 : Types of Variables in Functions</h2>  
              <?php   
                          echo "<ol>  
                                    <li>Global Variables</li>  
                                    <li>Local Variables</li>  
                                    <li>Static Static Variables</li>  
                                    </ol>" // we use list here  
                          ?>  
          <h2 align="left">Sample 2 : Define a function</h2>  
               <?php   
                          $age=22; //It is Global Variable  
                               function bio()  
                                    {       
                                    $name = "Samee_Ullah_Feroz";  
                                    /* 2 Points Are Here  
                                    1) Use under score in the place of space  
                                    2) It is Local Variable  
                                    */  
                                    echo "My name is " . $name;  
                                    echo "<br />";  
                                    } #Local Variables Concept is finished at the end of the function  
                                         bio();  
                          /*It is every important, it is used to call function.   
                          1) Function is Declared  
                          2) then Function is called  
                          3) Variables Inside the function are "Local Variables"  
                          4) Variables out side the function are "Global Variables"  
                          */  
                          echo "And my age is {$age}" #Here I used curly brackets that I can not forget a minor rule of variable.  
                          ?>  
     </body>  
   </html>

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