How to set $_GET variable

问题:

How do i set the variable that the $_GET function will be able to use, w/o submitting a form with action = GET?

回答1:

You can create a link , having get variable in href.

<a href="www.site.com/hello?getVar=value" >...</a>

回答2:

$_GET contains the keys / values that are passed to your script in the URL.

If you have the following URL :

http://www.example.com/test.php?a=10&b=plop

Then $_GET will contain :

array
  'a' => string '10' (length=2)
  'b' => string 'plop' (length=4)

Of course, as $_GET is not read-only, you could also set some values from your PHP code, if needed :

$_GET['my_value'] = 'test';

But this doesn't seem like good practice, as $_GET is supposed to contain data from the URL requested by the client.

回答3:

You can use GET variables in the action parameter of your form element. Example:

<form method="post" action="script.php?foo=bar">
    <input name="quu" ... />
    ...
</form>

This will give you foo as a GET variable and quu as a POST variable.

回答4:

One way to set the $_GET variable is to parse the URL using parse_url() and then parse the $query string using parse_str(), which sets the variables into the $_GET global.

This approach is useful,

• if you want to test GET parameter handling without making actual queries, e.g. for testing the incoming parameters for existence and input filtering and sanitizing of incoming vars.
• and when you don't want to construct the array manually each time, but use the normal URL

---

function setGetRequest($url)
{
    $query = parse_url($url, PHP_URL_QUERY);
    parse_str($query, $_GET);
}

$url = 'http://www.example.com/test.php?a=10&b=plop';

setGetRequest($url);   

var_dump($_GET);

Result: $_GET contains

array (
  'a' => string '10' (length=2)
  'b' => string 'plop' (length=4)
)

回答5:

If you want to fake a $_GET (or a $_POST) when including a file, you can use it like you would use any other var, like that:

$_GET['key'] = 'any get value you want';
include('your_other_file.php');

回答6:

The $_GET variable is populated from the parameters set in the URL. From the URL http://example.com/test.php?foo=bar&baz=buzz you can get $_GET['foo'] and $_GET['baz']. So to set these variables, you only have to make a link to that URL.

回答7:

For the form, use:

<form name="form1" action="<?=$_SERVER['PHP_SELF'];?>" method="get">

and for getting the value, use the get method as follows:

$value = $_GET['name_to_send_using_get'];

回答8:

You could use the following code to redirect your client to a script with the _GET variables attached.

header("Location: examplepage.php?var1=value&var2=value");
die();

This will cause the script to redirect, make sure the die(); is kept in there, or they may not redirect.

回答9:

I know this is an old thread, but I wanted to post my 2 cents...

Using Javascript you can achieve this without using $_POST, and thus avoid reloading the page..

<script>
function ButtonPressed()
{
window.location='index.php?view=next'; //this will set $_GET['view']='next'
}
</script>

<button type='button' onClick='ButtonPressed()'>Click me!</button>

<?PHP
 if(isset($_GET['next']))
    {
          echo "This will display after pressing the 'Click Me' button!";
    }
 ?>