get name of a post variable [duplicate]

Answer 1

Use the extended foreach syntax:

foreach ($_POST as $key => $value)
{
    echo $key . ": ". $value . "\n"; 
}

Answer 2

I disagree with this post, since it assumes that output is always intended for a browser. One should not get into the habit of this. \n is the correct usage and can be easily converted before output ( to a browser ) using the nl2br() function.

Answer 3

$_POST is populated as an associative array, so you can just do this:

foreach ($_POST as $name => $val)
{
     echo htmlspecialchars($name . ': ' . $val) . "\n";
}

Additionally, if you're just interested in the field names, you can use array_keys($_POST); to return an array of all the keys used in $_POST. You can use those keys to reference values in $_POST.

foreach (array_keys($_POST) as $field)
{
    echo $_POST[$field];
}

• foreach documentation
• array_keys documentation