I want to match a URL on my 404 page and based on that I want to redirect user to particular location.
The URL is http://domain.com/there/12345
// example: /there/12345
$request = $_SERVER['REQUEST_URI'];
if (preg_match('', $request)) {
}
What REGEX I should put to get this? And once the test is successful, how can I retrieve this ID (12345) right after constant there?
The regexp you want to use is:
$str=$_SERVER['REQUEST_URI'];
$regex = '/\/there\/(\d+)/';
$matches=array();
preg_match($regex, $str, $matches);
var_dump($matches)
This gives
array
0 => string '/there/12345' (length=12)
1 => string '12345' (length=5)
Notice the parantheses around \d+ capture anything that \d+ matches (i.e. continuous string of digits 0-9)
If you want to have a hexadecimal id (like 12ABF) then you should change the \d+ to [a-zA-Z\d]+
You can also use basename function.
$path = "http://domain.com/there/12345";
$filename = basename($path);
echo $filename; // Sholud be 12345
/there/ string component. Still, basename is highly convenient if getting 12345 is the only goal for this question.
This should do what you need:
$request = $_SERVER['REQUEST_URI'];
$match = array();
if (preg_match('@^/there/(\d+)$@', $request, $match)) {
$id = $match[1];
// Do your processing here.
}
Or if you tend to forget the \d syntax, and want to avoid the @ symbol or / as a delimiter:
$request = '/there/12345';
if (preg_match('#/there/([0-9]+)#', $request, $match)) {
$id = $match[1];
echo "ID: $id";
}
This will work :)
if(preg_match('#^/there/(\d+)$#', $request, $matches)){
echo "the id is {$matches[1]}";
}
else {
echo "no match!";
}
Explanation
# delimiter
^ beginning of string
/there/ string literal '/there/'
( begin capture group 1
\d+ one or more [0-9]
) end capture group 1
$ end of string
# delimiter
