Check if url contains parameters
Question by Puyol
Possible Duplicate:
keeping url parameters during pagination
I want to add a parameter to the current url with php, but how do I know if the url already contains a parameter?
Example:
foobar.com/foo/bar/index.php => foobar.com/foo/bar/index.php?myparameter=5
foobar.com/index.php?foo=7 => foobar.com/index.php?foo=7&myparameter=5
The main problem is that I don’t know if I need to add a “?”.
My code (found it somewhere, but it doesn’t work):
<?php if(/?/.test(self.location.href)){ //if url contains ?
$url = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]&myparameter=5";
} else {
$url = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]?myparameter=5";
}?>
Answer by Starx
The URL parameters and received from a global variable called $_GET which is in fact an array. So, to know if a URL contains a parameter, you can use isset() function.
if (isset($_GET['yourparametername'])) {
//The parameter you need is present
}
After wards, you can create separate array of such parameter you need to attach to a URL. LIke
if(isset($_GET['param1'])) {
\The parameter you need is present
$attachList['param1'] = $_GET['param1'];
}
if(isset($_GET['param2'])) {
$attachList['param2'] = $_GET['param2];
}
Now, to know whether or not, you need a ? symbol, just count this array
if(count($attachList)) {
$link .= "?";
// and so on
}
Update:
To know if any parameter is set, just count the $_GET
if(count($_GET)) {
//some parameters are set
}
