PHP/Form/Form Checkbox
Содержание
A form with checkboxes using the same name to store multiple values
<html>
<head>
<title>Using Default Checkbox Values</title>
</head>
<body>
<?php
$food = $_GET["food"];
if (!empty($food)){
echo "The foods selected are: <strong>";
foreach($food as $foodstuff){
echo "<br />".htmlentities($foodstuff);
}
echo "</strong>.";
}
else {
echo ("
<form action="". htmlentities($_SERVER["PHP_SELF"])."" method="GET">
<fieldset>
<label>
Italian
<input type="checkbox" name="food[]" value="Italian" />
</label>
<label>
Mexican
<input type="checkbox" name="food[]" value="Mexican" />
</label>
<label>
Chinese
<input type="checkbox" name="food[]" value="Chinese" checked="checked" />
</label>
</fieldset>
<input type="submit" value="Go!" />
</form> ");
}
?>
</body>
</html>
Checking input from a checkbox or a multiple select
<?php
$options = array("option 1", "option 2", "option 3");
$valid = true;
if (is_array($_GET["input"])) {
$valid = true;
foreach($_GET["input"] as $input) {
if (!in_array($input, $options)) {
$valid = false;
}
}
if ($valid) {
//process input
}
}
?>
Responding to Checkboxes
<html>
<head>
<title>Checkbox Demo</title>
</head>
<body>
<h1>Checkbox Demo</h1>
<h3>Demonstrates checkboxes</h3>
<form action ="HandleFormCheckBox.php">
<ul>
<li><input type ="checkbox" name ="chkFries" value ="11.00">Fries</li>
<li><input type ="checkbox" name ="chkSoda" value ="12.85">Soda</li>
<li><input type ="checkbox" name ="chkShake" value ="1.30">Shake</li>
<li><input type ="checkbox" name ="chkKetchup" value =".05">Ketchup</li>
</ul>
<input type ="submit">
</form>
</body>
</html>
<!-- HandleFormCheckBox.php
<html>
<head>
<title>Checkbox Demo</title>
</head>
<body>
<h3>Demonstrates reading checkboxes</h3>
<?
print <<<HERE
chkFries: $chkFries <br>
chkSoda: $chkSoda <br>
chkShake: $chkShake <br>
chkKetchup: $chkKetchup <br>
<hr>
HERE;
$total = 0;
if (!empty($chkFries)){
print ("You chose Fries <br>");
$total = $total + $chkFries;
}
if (!empty($chkSoda)){
print ("You chose Soda <br>");
$total = $total + $chkSoda;
}
if (!empty($chkShake)){
print ("You chose Shake <br>");
$total = $total + $chkShake;
}
if (!empty($chkKetchup)){
print ("You chose Ketchup <br>");
$total = $total + $chkKetchup;
}
print "The total cost is \$$total";
?>
</body>
</html>
-->
Using Default Checkbox Values
<html>
<head>
<title>Using Default Checkbox Values</title>
</head>
<body>
<?php
$food = $_GET[food];
$self = htmlentities($_SERVER["PHP_SELF"]);
if (!empty($food)) {
echo "The foods selected are:<br />";
foreach($food as $foodstuf)
{
echo "<strong>".htmlentities($foodstuf)."</strong><br />";
}
}
else
{
echo ("<form action=\"$self\" ");
echo ("method="get">
<fieldset>
<label>Italian <input type="checkbox" name="food[]" value="Italian" />
</label>
<label>Mexican <input type="checkbox" name="food[]" value="Mexican" />
</label>
<label>Chinese <input type="checkbox" name="food[]" value="Chinese"
checked="checked" /></label>
</fieldset>
<input type="submit" value="Go!" >");
}
?>
</body>
</html>
Validating a single checkbox
<?php
$value = "yes";
echo "<input type="checkbox" name="subscribe" value="yes"/> Subscribe?";
if (isset($_POST["subscribe"])) {
if ($_POST["subscribe"] == $value) {
$subscribed = true;
} else {
$subscribed = false;
print "Invalid checkbox value submitted.";
}
} else {
$subscribed = false;
}
if ($subscribed) {
print "You are subscribed.";
} else {
print "You are not subscribed";
}