PHP: Counter using Session Variables -


i need som adding value session variable using submit buttons. if define variables 0 won't count up, , if don't says:

"notice: undefined index: paperbagcount in /home/saxon/students/20151/chwi15/www/affar3/test.php on line 52"

"notice: undefined index: plasticbagcount in /home/saxon/students/20151/chwi15/www/affar3/test.php on line 59"

<?php  if(!session_status() === php_session_active ) { session_start(); $_session["paperbagcount"] = 0; $_session["plasticbagcount"] = 0;  }  session_start(); error_reporting(-1);  ?>  <!doctype html> <html lang="en">  <head>   <meta charset="utf-8">    <title>startsida</title>    </head>  <body>  <?php  if(isset($_post['addpaper'])) {   $_session["paperbagcount"]+=1; }  if(isset($_post['deletepaper'])) {     if ($_session["paperbagcount"] == 0) {         $_session["paperbagcount"] == 0;      }else{           $_session["paperbagcount"]-=1;     } }  if(isset($_post['addplastic'])) {   $_session["plasticbagcount"]+=1; }  if(isset($_post['deleteplastic'])) {     if ($_session["plasticbagcount"] == 0) {         $_session["plasticbagcount"] == 0;      }else{           $_session["plasticbagcount"]-=1;     } }  ?>    <form method="post"> <p><label>paperbagcount</label><br> <input type="submit" name="addpaper" value="+"> <?php echo $_session["paperbagcount"] . "\n"; ?> <input type="submit" name="deletepaper" value="-"> </form>  <form method="post"> <p><label>plasticbagcount</label><br> <input type="submit" name="addplastic" value="+"> <?php echo $_session["plasticbagcount"] . "\n"; ?> <input type="submit" name="deleteplastic" value="-"> </form>  </body> </html>

replace php code this

<?php  @session_start(); // @ avoid warning if (!isset($_session["paperbagcount"])) {     $_session["paperbagcount"] = 0; } if (!isset($_session["plasticbagcount"])) {     $_session["plasticbagcount"] = 0; } ?>

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