php - How can i show value when checkbox was checked using loop for? -

php - How can i show value when checkbox was checked using loop for? -

how can show value when checkbox checked using loop ?

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<form method="post"> <input type="checkbox" name="a_0" value="0">0 <input type="checkbox" name="a_1" value="1">1 <input type="checkbox" name="a_2" value="2">2 <input type="checkbox" name="a_3" value="3">3 <input type="checkbox" name="a_4" value="4">4 <input type="submit" name="submit"> </form> <?php if(isset($_post["submit"])) { for($i=0;$i<4;$i++) { if(${"_post[a_{$i}]"} != '') { echo ${"_post[a_{$i}]"}; } else { echo "no"; } } } ?>

change:

${"_post[a_{$i}]"}

to:

$_post['a_' . $i]

or (note double quotes):

$_post["a_$i"]

php post for-loop