Does the PHP code check that the URL link already has the parameters of the PHP code added? Or &

such as paging, because some links already have parameters, in the additional paging information can not discard the original parameters, so determine whether the link has parameters, and then attach paging information as needed.
The method is simple:

Copy the Code code as follows:

(Strpos ($url, '? ')!== false)? ' & ': '? ');

Check if the link contains? , if any, such as:
Http://www.test.com/index.php?id=id
Add a & and then follow the paging information directly after the link:
Http://www.jb51.net/index.php?id=id&page=12
If there are no parameters in the link, such as:
http://www.test.com/index.php
You need to add & and then follow the paging information:
Http://www.jb51.net/index.php?page=12
A more robust inspection method is attached:

Copy the Code code as follows:

$old _url = $_server["Request_uri"];
Check to see if the link exists?
$check = Strpos ($old _url, '? ');
If it exists?
if ($check!== false)
{
If? There are no parameters, such as http://www.yitu.org/index.php?
if (substr ($old _url, $check + 1) = = ")
{
Additional parameters can be added directly
$new _url = $old _url;
}
else//If there are parameters, such as: http://www.yitu.org/index.php?ID=12
{
$new _url = $old _url. ' & ';
}
}
else//If it does not exist?
{
$new _url = $old _url. '? ';
}
echo $new _url;
?>

The above describes the PHP code to check whether URL links are already parameters of the PHP code to add? or &, including PHP code content, want to be interested in PHP tutorial friends helpful.

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