Get selected key/value of a select box using php - php

Question

how can I get the selected key and value of a HTML select box using php?
<select>
<option value="KEY">VALUE</option>
</select>
php code ?

Answer 1

With PHP, it is not straight forward.
However, with use of array you can achieve it.
Take and array of all options in a common function:
$options = array();
$options[1] = 'one';
$options[2] = 'two';
$options[3] = 'three';
Display drop down like this:
<select name="opt">
<option value=""></option>
<?php
if (! empty($options)) {
foreach ($options as $key => $val) {
?>
<option value="<?php echo $key;?>"><?php echo $val;?></option>
<?php
}
}
?>
</select>
And where the form is posted, again get the array.
//$options : fetch from common function.
if (isset($_POST['opt'])) {
echo "key: " . $_POST['opt'];
echo "<br/>";
echo "value: " . isset($options[$_POST['opt']]) ? $options[$_POST['opt']] : '';
}

Answer 2

You must do like this
<form class="" action="receiver.php" method="post">
<select name="mykey">
<option value="KEY">VALUE</option>
</select>
</form>
In your receiver.php do in this example
$keys = $_POST['mykey'];

Answer 3

Name of the select is the key and option is the value.
<select name="KEY">
<option value="VALUE">VALUE</option>
<option value="VALUE_2">VALUE</option>
</select>
On submit you will get a KEY => VALUE pair in $_GET or $_POST (whatever you use to handle the request)

Answer 4

page1.html:
<form action="page2.php" name='add' method="post">
<select name="foo">
<option value="my_value">my_value</option>
</select>
<input type='submit' name='submit'/>
</form>
page2.php:
<?php
$result = $_POST['foo'];
echo "result = ".$result."<br>";//output: result = my_value
?>

Answer 5

Using PHP, you could use this:
Put Key and Value as POST data, delimited with a symbol, for example '/'.
HTML:
<select name="myselect">
<option value="KEY/VALUE">VALUE</option>
</select>
Then in PHP, separate that key with explode() function.
PHP:
$pair = explode("/", $_POST["myselect"]);
$key = $pair[0];
$value = $pair[1];
print "Key: $key<br />";
print "Value: $value<br />";

Answer 6

Let's say you have form like this
<select name="country">
<option value="IN_India">India</option>
<option value="CN_China">China</option>
<option value="AE_UAE">UAE</option>
</select>
Upon submitting it, your $_POST would look something like this
print_r($_POST);
Array
(
[country] => IN_India
}
Now explde your $_POST data and fetch values like this
$data = explode('_', filter_input(INPUT_POST, 'country'));
print_r($data);
Array
(
[0] => IN
[1] => India
)