Trying to get value of url parameter with a regular expression

Question

I was trying to use a regular expression to get the value of the code parameter of the following url:

"http:\/\/instagram.com\/?code=wz6kmXaZbrDCHU8OdOW0PrshbZF60Zz8Aji4ivaG"

Unfortunately it didn't work out so I had ended up doing the following:

$jsonRedirectUriWithAuthCode = "http:\/\/instagram.com\/?code=wz6kmXaZbrDCHU8OdOW0PrshbZF60Zz8Aji4ivaG";

print "jsonRedirectUriWithAuthCode= " . $jsonRedirectUriWithAuthCode;
print "\n";
$query = parse_url($jsonRedirectUriWithAuthCode, PHP_URL_QUERY);
print "query= " . $query;
print "\n";
parse_str($query, $params);
print "params['code']= ". $params['code'];
die() ;

Which outputs:

jsonRedirectUriWithAuthCode= "http:\/\/instagram.com\/?code=wz6kmXaZbrDCHU8OdOW0PrshbZF60Zz8Aji4ivaG"
query= code=wz6kmXaZbrDCHU8OdOW0PrshbZF60Zz8Aji4ivaG"
params['code']= wz6kmXaZbrDCHU8OdOW0PrshbZF60Zz8Aji4ivaG"

The above does what I wanted to. But I'm still curious how this would be done if using a regular expression. Could someone maybe show me how to extract the value of the code parameter with a regular expression?

Answer 1

Go with parse_url and parse_str. To satisfy your curiosity, you can use something like:

preg_match_all('/code=(.*?)$/', $theUrl, $match); 
echo $match[1][0];