PHP and HTML: acquire all GET-values - php

Question

I am in need of a PHP-program which will take all values from a HTML-link (with GET), regardless of how much one changes things in the address-bar, and then prints it out on the page. The code I have now is this:
HTML:
Link
PHP:
<?php
Echo "Value1: "; Echo $_GET["a"]; Echo "\n";
Echo "Value2: "; Echo $_GET["b"]; Echo "\n";
Echo "Value3: "; Echo $_GET ["c"];
?>
It works as intended for just these values, but it cannot cope with, for example, another variable being added in the address bar. I need some kind of PHP-function which can look for all kinds of variables through the GET-function.
Any help is appreciated!

Answer 1

Use a loop (modify as needed):
foreach ($_GET as $num => $value)
{
echo 'Value ' . $num . ': ' . htmlentities($value). "<br>" . PHP_EOL;
}
References:
Control structures
htmlentities()

Answer 2

Something like this:
<?php
foreach ($_GET as $key => $value) {
echo htmlspecialchars($key) . " - " . htmlspecialchars($value) . "<br>";
}
?>

Answer 3

<?php
print_r($_GET);
?>

Answer 4

Use a foreach loop
foreach ($_GET as $key => $val){
echo htmlentities($key).": ".htmlentities($val)."<br />\n";
}
or simply -
echo "<pre>".print_r($_GET,1)."</pre>";

Answer 5

To get all values and their corresponding names:
foreach($_GET as $key => $value)
{
echo $key . ' - ' . $value;
}

Answer 6

$my_get = array(); // store $_GET vars
if ('GET' == $_SERVER['REQUEST_METHOD']) // check that request method is "get"
foreach ($_GET as $key => $val)
{
$my_get[$key] = $val; // store
}
output $my_get:
array (
'a' => 'value1',
'b' => 'value2',
'c' => 'value3',
)

Answer 7

Since $_GET is nothing but an array, you can use for each loop to get the elements of it.

Answer 8

you get all $_GET values using print_r($GET) ...
otherwise you could to something like this
foreach(array_keys($_GET) as $key) {
echo htmlspecialchars($_GET[$key]);
}
Later Edit : took into account the security issue exposed in the comment
using this method is good because you know what kind of variable you have then you could do something cool like :
if ($key == 'a') do this
if ($key == 'b' && $_GET[$key] == 'bar') do that