$_SERVER
This Function will help you to manage your GET parameters to facilitate coding and prevent duplication. This is a basic version but it can be easily extended.
<?php
// Author: Alberto Lepe (www.alepe.com)
/* Process $_GET to preserve user custom parameters
* the arguments is a list of URL parameters that should be removed/changed from URL
* for example:
*
* URL = "index.php?s=1&fi=2&m=4&p=3
*
* if called: fixGet("s"); the result has to be: ?fi=2&m=4&p=3
* if called: fixGet("s&m"); the result has to be: ?fi=2&p=3
* if called: fixGet("s=4"); the result has to be: ?s=4&fi=2&m=4&p=3
* if called: fixGet("s=2&m"); the result has to be: ?s=2&fi=2&p=3
* if called: fixGet("s=&m=3"); the result has to be: ?s=&fi=2&m=3&p=3
* if called: fixGet("s=2&m="); the result has to be: ?s=2&fi=2&m=&p=3
* Special: when it ends with a =":" its to leave it open at the end
* (just first occurrence) to facilitate concatenation:
* if called: fixGet("s=2&m:"); the result has to be: ?s=2&fi=2&p=3&m
* if called: fixGet("s=2&m:="); the result has to be: ?s=2&fi=2&p=3&m=
*
* Usage with HTML (using the URL example above and $id = 99):
*
* <a href="index.php<?php echo fixGet('m=2&s&fi:=').$id ?>" >Link</a>
* Explanation: change "m" to 2, delete "s" and "fi" gets the $id value. ("p" is kept as it is not specified)
* will output: <a href='index.php?m=2&p=3&fi=99'>Link</a>
*/
public function fixGet($args) {
if(count($_GET) > 0) {
if(!empty($args)) {
$lastkey = "";
$pairs = explode("&",$args);
foreach($pairs as $pair) {
if(strpos($pair,":") !== false) {
list($key,$value) = explode(":",$pair);
unset($_GET[$key]);
$lastkey = "&$key$value";
} elseif(strpos($pair,"=") === false)
unset($_GET[$pair]);
else {
list($key, $value) = explode("=",$pair);
$_GET[$key] = $value;
}
}
}
return "?".((count($_GET) > 0)?http_build_query($_GET).$lastkey:"");
}
?>
To test, copy+paste the following code into testFixGet.php
<?php
/*
* Unit Test for fixGet()
*/
$cases = array (
0 => array("s" => 1, "fi" => 2, "m" => 4, "p" => 3),
1 => array("s" => "", "fi" => "", "m" => 4, "p" => 3),
);
$test[0] = array(
"s" => "fi=2&m=4&p=3",
"s&m" => "fi=2&p=3",
"s=4" => "s=4&fi=2&m=4&p=3",
"s=2&m" => "s=2&fi=2&p=3",
"s=&m=3" => "s=&fi=2&m=3&p=3",
"s=2&m=" => "s=2&fi=2&m=&p=3",
"s=2&m:=" => "s=2&fi=2&p=3&m=",
"z=9" => "s=1&fi=2&m=4&p=3&z=9",
"z:" => "s=1&fi=2&m=4&p=3&z",
"s:&m=3" => "fi=2&m=3&p=3&s",
"s&m=3" => "fi=2&m=3&p=3",
);
$test[1] = array(
"s" => "fi=&m=4&p=3",
"s&m" => "fi=&p=3",
"s=4" => "s=4&fi=&m=4&p=3",
"s=2&m" => "s=2&fi=&p=3",
"s=&m=3" => "s=&fi=&m=3&p=3",
"s=2&m=" => "s=2&fi=&m=&p=3",
"s=2&m:=" => "s=2&fi=&p=3&m=",
"z=9" => "s=&fi=&m=4&p=3&z=9",
"z:" => "s=&fi=&m=4&p=3&z",
);
foreach($cases as $x => $value) {
echo "<hr> CASE: $x <hr>\n";
foreach($test[$x] as $arg => $expected) {
$_GET = $cases[$x];
$res = myForm::fixGet($arg);
echo (($res === "?".$expected)?"OK":"NG ($res)")." [$arg]<br>\n";
}
}
?>
$_GET
$HTTP_GET_VARS [obsoleta]
$_GET -- $HTTP_GET_VARS [obsoleta] — HTTP GET variáveis
Descrição
Um array associativo de variáveis passadas para o script atual via o método HTTP GET.
$HTTP_GET_VARS contém a mesma informação inicial, mas não é uma superglobal. (Note que $HTTP_GET_VARS e $_GET são variáveis diferentes e que o PHP manuseia-as diferentemente)
Histórico
| Versão | Descrição |
|---|---|
| 4.1.0 | Introduzida a $_GET que torna obsoleta a $HTTP_GET_VARS. |
Exemplos
Exemplo #1 Exemplo da $_GET
<?php
echo 'Hello ' . htmlspecialchars($_GET["name"]) . '!';
?>
Assumindo que o usuário entrou por http://example.com/?name=Hannes
O exemplo acima irá imprimir algo similar a:
Hello Hannes!
Notas
Nota: Esta é uma 'superglobal', ou global automática, variável. Isto simplismente significa que ela está disponível em todos escopos pelo script. Não há necessidade de fazer global $variable; para acessá-la dentro de uma função ou método.
add a note
User Contributed Notes$_GET
Alberto Lepe dev at alepe dot com
05-Oct-2009 02:23
05-Oct-2009 02:23
robotreply at gmail dot com
24-Jul-2009 05:17
24-Jul-2009 05:17
Parsing of GET/POST drops duplicate variables unless those variables have "[]" (PHP bugs #10502, #15498 and #16195). Adding "[]" makes a mess of your javascript code, so here is a small workaround to it.
This function basically scans your raw POST and GET input and tries to fix the same. This function must be called near the top of your script. Optimizations are welcome.
<?php
function php_fix_raw_query() {
$post = '';
// Try globals array
if (!$post && isset($_GLOBALS) && isset($_GLOBALS["HTTP_RAW_POST_DATA"]))
$post = $_GLOBALS["HTTP_RAW_POST_DATA"];
// Try globals variable
if (!$post && isset($HTTP_RAW_POST_DATA))
$post = $HTTP_RAW_POST_DATA;
// Try stream
if (!$post) {
if (!function_exists('file_get_contents')) {
$fp = fopen("php://input", "r");
if ($fp) {
$post = '';
while (!feof($fp))
$post = fread($fp, 1024);
fclose($fp);
}
} else {
$post = "" . file_get_contents("php://input");
}
}
$raw = !empty($_SERVER['QUERY_STRING']) ? sprintf('%s&%s', $_SERVER['QUERY_STRING'], $post) : $post;
$arr = array();
$pairs = explode('&', $raw);
foreach ($pairs as $i) {
if (!empty($i)) {
list($name, $value) = explode('=', $i, 2);
if (isset($arr[$name]) ) {
if (is_array($arr[$name]) ) {
$arr[$name][] = $value;
} else {
$arr[$name] = array($arr[$name], $value);
}
} else {
$arr[$name] = $value;
}
}
}
foreach ( $_POST as $key => $value ) {
if (is_array($arr[$key]) ) {
$_POST[$key] = $arr[$name];
$_REQUEST[$key] = $arr[$name];
}
}
foreach ( $_GET as $key => $value ) {
if (is_array($arr[$key]) ) {
$_GET[$key] = $arr[$name];
$_REQUEST[$key] = $arr[$name];
}
}
# optionally return result array
return $arr;
}
?>
slavik0329
19-Mar-2009 01:01
19-Mar-2009 01:01
the addget function below actually has more use when you dont use the recursive merge as such:
<?php
function AddGet($ArrayOrString){
if(is_array($ArrayOrString))
return http_build_query(array_merge($GLOBALS['_GET'], $ArrayOrString));
parse_str($ArrayOrString, $output);
return http_build_query(array_merge($GLOBALS['_GET'], $output));
}
?>
In this case, if the key is added again with a different value it will be replaced with the new value.
addget("change=true"); // ?change=true
addget("change=false"); // ?change=false
admin at bordeux dot net
29-Jan-2009 06:03
29-Jan-2009 06:03
<?php
function AddGet($ArrayOrString){
if(is_array($ArrayOrString))
return http_build_query(array_merge_recursive($GLOBALS['_GET'], $ArrayOrString));
parse_str($ArrayOrString, $output);
return http_build_query(array_merge_recursive($GLOBALS['_GET'], $output));
}
?>
<a href="index.php?<?php echo AddGet(array("change"=>true,"jump"=>"42m"));?>">URL</a>
<a href="index.php?<?php echo AddGet("change=true&jump=42m");?>">URL</a>
Assuming the user entered http://example.com/?name=Hannes
The above example will output something similar to:
<a href="index.php?name=Hannes&change=1&jump=42m">URL</a>
<a href="index.php?name=Hannes&change=true&jump=42m">URL</a>
hmaloney at contactpoint dot com dot au
18-Sep-2008 09:38
18-Sep-2008 09:38
This code is really useful for reproducing the values in the $_GET variable, and attaching that to a $_SERVER['PHP_SELF'] value when building the action value of a form tag, so that you don't lose any other values that could have been passed:
foreach ($_GET as $key => $value) {
if ($key != "C") { // ignore this particular $_GET value
$querystring .= $key."=".$value;
}
}
RJ Regalado
17-Jun-2008 12:57
17-Jun-2008 12:57
Use this code if you want to retrieve your queries no matter what method is used. Hope it helps.
<?php
// By: RJ Regalado
// http://rjfiles.uni.cc/~php_examples/?id=1
$name = trim ((!empty($_POST['name'])) ? $_POST['name'] : $_GET['name'] );
if ( strlen ($name) < 1)
{
echo "Please enter your name";
} else {
printf ("Hello <b>%s</b><br>", $name);
printf ("Bonjour <b>%s</b><br>", $name);
printf ("Hallo <b>%s</b><br>", $name);
printf ("Ciao <b>%s</b><br>", $name);
printf ("Hola <b>%s</b><br>", $name);
}
?><hr>
<form method="POST">
Name: <input type="text" name="name">
<input type="submit" value="POST">
</form><hr>
<form method="GET">
Name: <input type="text" name="name">
<input type="submit" value="GET">
</form>
timberspine _AT_ gmail _DOT_ com
14-May-2008 09:38
14-May-2008 09:38
Note that named anchors are not part of the query string and are never submitted by the browser to the server.
Eg.
http://www.xyz-abc.kz/index.php?title=apocalypse.php#doom
echo $_GET['title'];
// returns "apocalypse.php" and NOT "apocalypse.php#doom"
you would be better off treating the named anchor as another query string variable like so:
http://www.xyz-abc.kz/index.php?title=apocalypse.php&na=doom
...and then retrieve it using something like this:
$url = $_GET['title']."#".$_GET['na'];
Hope this helps someone...
niwil at djes dot dk
14-May-2008 11:00
14-May-2008 11:00
Note:
If nothing is set in the address bar, the value of $_GET['n'] will be NULL, not ""(empty string) or false.