checkbox checked with php form post?

Question

how do I check a checkbox? I've tried 1, On, Yes that doesn't work. putting the worked "checked" alone works but then how do I check with php after form post of the checkbox is checked?

<input type="checkbox" class="inputcheckbox" id="newmsg" name=chk[newmsg2] value="1" />

Answer 1

here is the code;

<form action="test.php" method="POST">
<input type="checkbox" class="inputcheckbox" id="newmsg" name=chk[newmsg2] value="1" />
<input type="submit">
</form>
<?php
    $check = $_POST['chk']['newmsg2'];
    echo "***$check****"
?>

if it is checked $check will show 1.

Answer 2

<input type="checkbox" class="inputcheckbox" id="newmsg" name=chk[newmsg2] value="1" <?php if ($_POST['chk']['newmsg2']): ?>checked="checked"<?php endif; ?> />

Answer 3

A checkbox will only be a successful control if it is checked.

Controls that are not successful are not submitted as data.

Therefore, you can tell if a checkbox is checked by seeing if it's value has been submitted.

e.g.

if ($_POST['chk']['newmsg2'] == 1) {