The predefined $_GET variable is
used to collect values in a form with method="get"
Information sent from a form with
the GET method is visible to everyone (it will be displayed in the browser's
address bar) and has limits on the amount of information to send.
Example
<form
action="welcome.php" method="get">
Name: <input type="text" name="fname" />
Age: <input type="text" name="age" />
<input type="submit" />
</form>
Name: <input type="text" name="fname" />
Age: <input type="text" name="age" />
<input type="submit" />
</form>
When the user clicks the
"Submit" button, the URL sent to the server could look something like
this:
http://www.w3schools.com/welcome.php?fname=Peter&age=37
The "welcome.php" file can
now use the $_GET variable to collect form data (the names of the form fields
will automatically be the keys in the $_GET array):
Welcome <?php echo
$_GET["fname"]; ?>.<br />
You are <?php echo $_GET["age"]; ?> years old!
You are <?php echo $_GET["age"]; ?> years old!
When
to use method="get"?
When using method="get" in
HTML forms, all variable names and values are displayed in the URL.
Note: This method should not be used when sending passwords or
other sensitive information!
However, because the variables are
displayed in the URL, it is possible to bookmark the page. This can be useful
in some cases.
Note: The get method is not suitable for very large variable
values. It should not be used with values exceeding 2000 characters.
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