在PHP中无法识别的值

Question

<form action="" method="post">
<?php
$i=0;
while(i<4){ ?> 
<input type="checkbox" name="<?php echo 'chkApprove_'.$i; ?>"/>
<?php
}

?>
<input type="submit" name="btnsubmit"/>
</form>

if(isset($_POST['btnsubmit']))
 {

    $i=0;
    while($i<4)
    {
        echo $i;
        $chek=$_POST['chkApprove_'.$i];// Error Undefined Index

        $i++;
    }
 }

Error is displayed as Undefined index: chkApprove_0...chkApprove_3. Am i doing something wrong here.

Answer 1

$ was missing in you while loop before "i". and $i was not increamenting.

<?php
$i=0;
while($i<4){ ?> 
 <input type="checkbox" name="<?php echo 'chkApprove_'.$i; ?>"/>
<?php
     $i++;
}
?>