注意：未定义的偏移量

Question

Please am trying to input points for 8 teams,with just one form. I want to compare and get the highest score after the form has been submitted. I have created the form, but am having a little problem. Am getting "Undefined offset: 8" error. but the scores and name of the team shows perfectly. Here is my html code

<div class="container">
             <form method="post" action="../_libs/test.php">
            <?php
             foreach($teams as $arr)
             {
              ?>

                    <div class="row team_result">

                        <div class="col-md-8">

                          <div class="row">
                            <div class="col-md-3"> <img class="img img-thumbnail" src="../_images/<?php echo $arr['Team_Logo']; ?>" width="50" height="50"> </div>

                            <div class="col-md-3"> <label> <?php echo $arr['Team_Name']; ?> </label> </div>

                            <div class="col-md-3">
                                <div class="input-group">
                                    <input type="text" class="form-control" name="points[]" placeholder="points">
                                </div>
                           <input type="text" name="Name[]" id="" value="<?php echo $arr['Team_Name'] ?>"
             style="display:none" >
                           </div>


                           </div>

                        </div>




                    </div>

              <?php  
             }

            ?>
            <div class="col-lg-6 col-lg-offset-4"> <input type="submit" class="btn btn-primary" name="submit" value="Post"> </div>
            </form>
            </div>

And the PHP code

<?php

 //echo json_encode($_POST);

 if(!empty($_POST['Name'])){
        $team=$_POST['Name'];
        $teams=count($team);
             for($i=0; $i <=  $teams; $i++)
                   {
                       echo $team[$i] .",". $_POST['points'][$i]."<br>";
                     // echo $teams;
                   }

 }


?>

Answer 1

In for loop you need to use just <, not <=

for ($i = 0; $i < $teams; $i++)

While you use <=, you have 8 teams, but 9 iterations in your loop (for $i equal to 0, 1, 2, 3, 4, 5, 6, 7 and 8). The last one is undefined.