According to the HTTP specification, you should use the POST method when you're using the form to change the state of something on the server end. For example, if a page has a form to allow users to add their own comments, like this page here, the form should use POST. If you click "Reload" or "Refresh" on a page that you reached through a POST, it's almost always an error -- you shouldn't be posting the same comment twice -- which is why these pages aren't bookmarked or cached.
You should use the GET method when your form is, well, getting something off the server and not actually changing anything. For example, the form for a search engine should use GET, since searching a Web site should not be changing anything that the client might care about, and bookmarking or caching the results of a search-engine query is just as useful as bookmarking or caching a static HTML page.
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tutorial.forms.php
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One of the most powerful features of PHP is the way it handles HTML forms. The basic concept that is important to understand is that any form element will automatically be available to your PHP scripts. Please read the manual section on Variables from external sources for more information and examples on using forms with PHP. Here is an example HTML form:
Пример #1 Прост HTML образец
<form action="action.php" method="post">
<label for="name">Your name:</label>
<input name="name" id="name" type="text">
<label for="age">Your age:</label>
<input name="age" id="age" type="number">
<button type="submit">Submit</button>
</form>
There is nothing special about this form. It is a straight HTML form with no special tags of any kind. When the user fills in this form and hits the submit button, the action.php page is called. In this file you would write something like this:
Example #2 Printing data from our form
Hi <?php echo htmlspecialchars($_POST['name']); ?>.
You are <?php echo (int) $_POST['age']; ?> years old.Примерен излез од оваа скрипта може да биде:
Hi Joe. You are 22 years old.
Apart from the htmlspecialchars() and
(int) parts, it should be obvious what this does.
htmlspecialchars() makes sure any characters that are special in html are properly encoded so people can't inject HTML tags or Javascript into your page. For the age field, since we know it is a number, we can just convert
it to an int which will automatically get rid of any stray characters. You can also have PHP do this for you automatically by using the filter extension. The $_POST['name'] and $_POST['age']
variables are automatically set for you by PHP. Earlier we used the $_SERVER superglobal; above we just introduced the $_POST
superglobal which contains all POST data. Notice how the
method of our form is POST. If we used the method GET then our form information would live in the $_GET superglobal instead. You may also use the $_REQUEST
суперглобална, ако не ви е грижа за изворот на податоците од вашето барање. Содржи споени информации од GET, POST и COOKIE податоци.
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sethg на ropine точка com ¶
пред 22 години