<form method=“post” action=“”>
<span>Select languages</span><br/>
<input type=“checkbox” name=‘lang[]’ value=“PHP”> PHP <br/>
<input type=“checkbox” name=‘lang[]’ value=“JavaScript”> JavaScript <br/>
<input type=“checkbox” name=‘lang[]’ value=“jQuery”> jQuery <br/>
<input type=“checkbox” name=‘lang[]’ value=“Angular JS”> Angular JS <br/>
<input type=“submit” value=“Submit” name=“submit”>
</form>
<?php
if(isset($_POST[‘submit’])){
if(!empty($_POST[‘lang’])) {
foreach($_POST[‘lang’] as $value){
echo “value : “.$value.‘<br/>’;
}
}
update_option( ‘pnr_post_type’,$_POST[‘lang’] );
}
?>
get value and check
$posttype = get_option( ‘pnr_post_type’ );
print_r($posttype);
check the value exist or not
echo var_dump(in_array(‘PHP’, $posttype)); // TRUE
echo var_dump(in_array(19, $posttype)); // TRUE