你能把PHP文本变成一个变量吗？

问题描述：

I was wondering if it was possible to dynamically create variables like so:

$sender = $email = $number = $message = "";

foreach ($_POST as $key => $value) {
    if isset & !empty //loosely typed
    $+key = $value // can something like this be done?
}

if so how?

答

PHP does have variable variables, but you don't need that here. I think a simple associative array or object will work just fine for you.

$data = array(
  'sender' => 'Someone',
  'email' => 'test@example.com',
  'number' => 12345,
  'message' => 'some message'
);

echo $data['sender']; // Someone

答

Something like this should work. But I wouldn't do it unless you completely trust the data and if its POST data then access it like $_POST['key']

foreach ($_POST as $key => $value) {
    if isset & !empty //loosely typed
    ${$key} = $value // can something like this be done?
}

答

There is a PHP function called extract which does what you are looking for.

http://nz2.php.net/extract

你能把PHP文本变成一个变量吗？

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