How to get parameters from a URL string?
-
20-06-2021 - |
سؤال
I have a HTML form field $_POST["url"]
having some URL strings as the value.
Example values are:
https://example.com/test/1234?email=xyz@test.com https://example.com/test/1234?basic=2&email=xyz2@test.com https://example.com/test/1234?email=xyz3@test.com https://example.com/test/1234?email=xyz4@test.com&testin=123 https://example.com/test/the-page-here/1234?someurl=key&email=xyz5@test.com
etc.
How can I get only the email
parameter from these URLs/values?
Please note that I am not getting these strings from browser address bar.
المحلول
You can use the parse_url()
and parse_str()
for that.
$parts = parse_url($url);
parse_str($parts['query'], $query);
echo $query['email'];
If you want to get the $url
dynamically with PHP, take a look at this question:
نصائح أخرى
All the parameters after ?
can be accessed using $_GET
array. So,
echo $_GET['email'];
will extract the emails from urls.
Use the parse_url() and parse_str() methods. parse_url()
will parse a URL string into an associative array of its parts. Since you only want a single part of the URL, you can use a shortcut to return a string value with just the part you want. Next, parse_str()
will create variables for each of the parameters in the query string. I don't like polluting the current context, so providing a second parameter puts all the variables into an associative array.
$url = "https://mysite.com/test/1234?email=xyz4@test.com&testin=123";
$query_str = parse_url($url, PHP_URL_QUERY);
parse_str($query_str, $query_params);
print_r($query_params);
//Output: Array ( [email] => xyz4@test.com [testin] => 123 )
As mentioned in other answer, best solution is using
parse_url()
You need to use combination of parse_url()
and parse_str()
.
The parse_url()
parse URL and return its components that you can get query string using query
key. Then you should use parse_str()
that parse query string and return
values into variable.
$url = "https://example.com/test/1234?basic=2&email=xyz2@test.com";
parse_str(parse_url($url)['query'], $params);
echo $params['email']; // xyz2@test.com
Also you can do this work using regex.
preg_match()
You can use preg_match()
to get specific value of query string from URL.
preg_match("/&?email=([^&]+)/", $url, $matches);
echo $matches[1]; // xyz2@test.com
preg_replace()
Also you can use preg_replace()
to do this work in one line!
$email = preg_replace("/^https?:\/\/.*\?.*email=([^&]+).*$/", "$1", $url);
// xyz2@test.com
Use $_GET['email']
for parameters in URL.
Use $_POST['email']
for posted data to script.
Or use _$REQUEST
for both.
Also, as mentioned, you can use parse_url()
function that returns all parts of URL. Use a part called 'query' - there you can find your email parameter. More info: http://php.net/manual/en/function.parse-url.php
you can use below code to get email address after ? in the URL
<?php
if (isset($_GET['email'])) {
echo $_GET['email'];
}
I created function from @Ruel answer. You can use this:
function get_valueFromStringUrl($url , $parameter_name)
{
$parts = parse_url($url);
if(isset($parts['query']))
{
parse_str($parts['query'], $query);
if(isset($query[$parameter_name]))
{
return $query[$parameter_name];
}
else
{
return null;
}
}
else
{
return null;
}
}
Example:
$url = "https://example.com/test/the-page-here/1234?someurl=key&email=xyz5@test.com";
echo get_valueFromStringUrl($url , "email");
Thanks to @Ruel
$uri = $_SERVER["REQUEST_URI"];
$uriArray = explode('/', $uri);
$page_url = $uriArray[1];
$page_url2 = $uriArray[2];
echo $page_url; <- see the value
This is working great for me using php
A much more secure answer that I'm surprised is not mentioned here yet:
So in the case of the question you can use this to get an email value from the URL get parameters:
$email = filter_input( INPUT_GET, 'email', FILTER_SANITIZE_EMAIL );
For other types of variables, you would want to choose a different/appropriate filter such as FILTER_SANITIZE_STRING
.
I suppose this answer does more than exactly what the question asks for - getting the raw data from the URL parameter. But this is a one-line shortcut that is the same result as this:
$email = $_GET['email'];
$email = filter_var( $email, FILTER_SANITIZE_EMAIL );
Might as well get into the habit of grabbing variables this way.
$web_url = 'http://www.writephponline.com?name=shubham&email=singh@gmail.com';
$query = parse_url($web_url, PHP_URL_QUERY);
parse_str($query, $queryArray);
echo "Name: " . $queryArray['name']; // Result: shubham
echo "EMail: " . $queryArray['email']; // Result:singh@gmail.com
In Laravel, I'm use:
private function getValueFromString(string $string, string $key)
{
parse_str(parse_url($string, PHP_URL_QUERY), $result);
return isset($result[$key]) ? $result[$key] : null;
}
Dynamic function which parse string url and get value of query parameter passed in URL
function getParamFromUrl($url,$paramName){
parse_str(parse_url($url,PHP_URL_QUERY),$op);// fetch query parameters from string and convert to associative array
return array_key_exists($paramName,$op) ? $op[$paramName] : "Not Found"; // check key is exist in this array
}
Call Function to get result
echo getParamFromUrl('https://google.co.in?name=james&surname=bond','surname'); // bond will be o/p here
To get parameters from URL string, I used following function.
var getUrlParameter = function getUrlParameter(sParam) {
var sPageURL = decodeURIComponent(window.location.search.substring(1)),
sURLVariables = sPageURL.split('&'),
sParameterName,
i;
for (i = 0; i < sURLVariables.length; i++) {
sParameterName = sURLVariables[i].split('=');
if (sParameterName[0] === sParam) {
return sParameterName[1] === undefined ? true : sParameterName[1];
}
}
};
var email = getUrlParameter('email');
If there are many URL strings, then you can use loop to get parameter 'email' from all those URL strings and store them in array.