增加PHP变量

Question

I have code that is not working like I want it to and I'm not sure why.

<input type="submit" name="next" value="next">

then the php...

$LimitStart = 0 ;
$LimitNext = 0 ;

then other stuff, then....

if (isset($_POST['next'])) {
    If ($LimitNext == 0) {
    $LimitNext = $LimitStart + 10 ;
    echo "<br>" ;
    echo $LimitNext ;
    echo "<br>" ;
    } Else {       
    $LimitNext = $LimitNext + 10    ;
    }    

My goal with this is that when someone hits the "next" button, the first time, since LimitNext will equal 0, $LimitNext will be set to whatever $LimitStart is + 10. Every time AFTER that that the "next" button is hit, it will increase $LimitNext by 10. This second part is not working. $Limitset, which is initially set to 0, obtains the value of 10 after I click the next button, but then it stays there forever and never increases. Is my syntax wrong? ($LimitNext = $Limitnext + 10 ;)

Answer 1

Try this instead (setting limit value in input). Next limit will be set to the $_POST['limit'] value + 10 (if post is set), or 10 by default. Notice I changed the name of the input.

<?php 
   $postedLimit = (isset($_POST['limit']) ? (int) $_POST['limit'] : 0);
   $nextLimit = $postedLimit + 10;
?>

<input type="submit" name="limit" value="<?php echo $nextLimit; ?>" />