How do I see which checkbox is checked?
you can check that by either isset() or empty() (its check explicit isset) weather check box is checked or not
for example
<input type='checkbox' name='Mary' value='2' id='checkbox' />here you can check by
if (isset($_POST['Mary'])) { echo "checked!";}or
if (!empty($_POST['Mary'])) { echo "checked!";}the above will check only one if you want to do for many than you can make an array instead writing separate for all checkbox try like
<input type="checkbox" name="formDoor[]" value="A" />Acorn Building<br /><input type="checkbox" name="formDoor[]" value="B" />Brown Hall<br /><input type="checkbox" name="formDoor[]" value="C" />Carnegie Complex<br />php
$aDoor = $_POST['formDoor']; if(empty($aDoor)) { echo("You didn't select any buildings."); } else { $N = count($aDoor); echo("You selected $N door(s): "); for($i=0; $i < $N; $i++) { echo htmlspecialchars($aDoor[$i] ). " "; } }
Try this
index.html
<form action="form.php" method="post"> Do you like stackoverflow? <input type="checkbox" name="like" value="Yes" /> <input type="submit" name="formSubmit" value="Submit" /> </form>form.php
<html><head></head><body><?php if(isset($_POST['like'])) { echo "<h1>You like Stackoverflow.<h1>"; } else { echo "<h1>You don't like Stackoverflow.</h1>"; } ?></body></html>Or this
<?php if(isset($_POST['like'])) && $_POST['like'] == 'Yes') { echo "You like Stackoverflow."; } else { echo "You don't like Stackoverflow."; } ?>