Loop increment on button click

[fatmart]

Hi. I want to do a button that when you click on it, the number in the input value increases.

<form method="post" name="form" action="<?php echo $PHP_SELF; ?>">
<input type="text" value="1" name="" />
<input type="submit" value="+" name="submit" />
</form>

I know I have to do a loop but I don't know how to use it for what I want to do.. Like everytime I post, the value in the input increases by 1.

Thanks in advance

[jeff_tet]

Why not try starting a session create a session var $_SESSION['myvar'] and do something like this

<form method="post" name="form" action="<?php echo $PHP_SELF; ?>">
<input type="text" value="1" name="increment_value" />
<input type="submit" name="submit" />
</form>

if(!isset($SESSION['myvar'])) {
$SESSION['myvar'] = 0;
} else {
$SESSION['myvar'] += $GET['increment_value'];
}

reload page with new value.

[bradgrafelman]

Or, without a session:

echo '<input type="text" name="increment_value" value="' . (isset($_POST['increment_value']) ? $_POST['increment_value']+1 : 1) . '">';