Get url variable in php

Как получить текущий URL в PHP?

Сформировать текущий адрес страницы можно с помощью элементов массива $_SERVER. Рассмотрим на примере URL:

Полный URL

$url = ((!empty($_SERVER['HTTPS'])) ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; echo $url;

Результат:

https://example.com/category/page?sort=asc

URL без GET-параметров

$url = ((!empty($_SERVER['HTTPS'])) ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; $url = explode('?', $url); $url = $url[0]; echo $url;

Результат:

https://example.com/category/page

Основной путь и GET-параметры

$url = $_SERVER['REQUEST_URI']; echo $url;

Результат:

Только основной путь

$url = $_SERVER['REQUEST_URI']; $url = explode('?', $url); $url = $url[0]; echo $url;

Результат:

Только GET-параметры

Результат:

Для преобразования строки с GET-параметрами в ассоциативный массив можно применить функцию parse_str() .

parse_str('sort=asc&page=2&brand=rich', $get); print_r($get);

Результат:

Array ( [sort] => asc [page] => 2 [brand] => rich )

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Mastering URL Handling in PHP: Getting the Full URL and Extracting Data

Learn how to get the full URL or current page URL in PHP using the $_SERVER superglobal variable, extract data from the URL with $_GET and parse_url(), and discover helpful tips for URL handling in PHP. Start optimizing your URL handling today!

• Introduction
• Getting the Full URL or Current Page URL in PHP
• Get Current Page URL in PHP
• Extracting Data from the URL
• Other Ways to Get the Full URL or Current Page URL in PHP
• Helpful Tips for URL Handling in PHP
• Other helpful code samples for getting the full URL or current page URL in PHP
• Conclusion
• How to get the URL in PHP?
• How to get domain from URL in PHP?
• How to get the URL segment in PHP?
• How to get current URL with query string in PHP?

As a developer, you may often need to work with URLs in your PHP application. Whether you need to get the current page URL or extract data from a URL, PHP provides a variety of functions and superglobal variables to make URL handling easy and efficient.

In this article, we will discuss the best practices for mastering URL handling in PHP, including getting the full URL or current page URL, extracting data from the URL, and other helpful tips for URL handling. By the end of this article, you will have a comprehensive understanding of how to handle URLs in your PHP applications.

Introduction

URLs are an essential part of the web, and as a developer, you need to know how to work with them efficiently. In this section, we will introduce the topic of getting the full URL or current page URL in PHP and extracting data from the URL. We will also discuss the user intent of the reader wanting to learn how to do this.

Getting the Full URL or Current Page URL in PHP

To get the full URL or current page URL in PHP, we can use the $_SERVER superglobal variable. This variable contains information about the current request, including the URL. Here are some of the necessary superglobal variables to get the full URL:

• $_SERVER[‘HTTPS’] : This variable contains the scheme of the URL (either “http” or “https»).
• $_SERVER[‘REQUEST_URI’] : This variable contains the path and query string of the URL.
• $_SERVER[‘SERVER_PORT’] : This variable contains the port number of the server.

To get the base URL with PHP, we can concatenate the above variables using the dot (.) operator. Here’s an example:

$base_url = "http" . (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? "s" : "") . "://" . $_SERVER['SERVER_NAME'] . $_SERVER['REQUEST_URI']; 

In the above example, we check if the $_SERVER[‘HTTPS’] variable is set and its value is “on”. If it is, we add an “s” to the scheme to indicate that the URL is using the HTTPS protocol.

Get Current Page URL in PHP

Extracting Data from the URL

To extract data from the URL, we can use the $_GET superglobal array. This array contains the query string parameters of the URL. For example, consider the following URL:

http://example.com/page.php?param1=value1¶m2=value2 

To get the value of param1 and param2 , we can use the following code:

$param1 = $_GET['param1']; $param2 = $_GET['param2']; 

We can also use the parse_url() function to parse a URL into its components, such as scheme, host, path, and query string. Here’s an example:

$url = "http://example.com/page.php?param1=value1¶m2=value2"; $url_components = parse_url($url); $path = $url_components['path']; $query = $url_components['query']; 

We can use the explode() function to split a URL into segments based on a delimiter. For example, to get the segments of the path of the above URL, we can use the following code:

$path_segments = explode('/', $path); 

To encode a URL string, we can use the urlencode() function. This function replaces special characters in a URL string with their corresponding percent-encoded values. For example, to encode the string “hello world”, we can use the following code:

$encoded_string = urlencode("hello world"); 

We can also use the preg_replace() function to replace characters in a URL string based on a regular expression. For example, to replace all spaces in a URL string with hyphens, we can use the following code:

$url = "http://example.com/page with spaces.php"; $url = preg_replace('/\s+/', '-', $url); 

Other Ways to Get the Full URL or Current Page URL in PHP

Apart from using the $_SERVER superglobal variable, there are other ways to get the full URL or current page URL in PHP. For example:

• $_SERVER[‘SCRIPT_NAME’] : This variable contains the path of the current script.
• $_SERVER[‘DOCUMENT_ROOT’] : This variable contains the document root of the server.
• $_SERVER[‘QUERY_STRING’] : This variable contains the query string portion of the URL.

To get the query string parameters as an associative array, we can use the parse_str() function. This function parses a query string into variables and returns an associative array of variable names and values. For example, consider the following query string:

To parse this query string into an associative array, we can use the following code:

$query_string = "param1=value1¶m2=value2"; parse_str($query_string, $params); 

We can also use the http_build_query() function to build a query string from an associative array of variables. For example, to build a query string from the above associative array, we can use the following code:

$params = array('param1' => 'value1', 'param2' => 'value2'); $query_string = http_build_query($params); 

To get the referring URL, we can use the $_SERVER[‘HTTP_REFERER’] variable. This variable contains the URL of the page that referred the user to the current page.

Helpful Tips for URL Handling in PHP

URL handling in PHP is essential, but it can also be a source of security vulnerabilities if not handled correctly. Here are some helpful tips for URL handling in PHP:

• Sanitize and validate user input from the URL to prevent security vulnerabilities such as SQL injection.
• Use the HTTPS protocol in URLs for better security.
• Use URL rewriting techniques to create more user-friendly URLs.
• Use regular expressions and the preg_match() function to extract data from the URL’s path.
• Use built-in PHP functions to manipulate URLs, such as parse_str() to parse the query string and http_build_query() to build a query string.
• Use a URL shortener service for long and complex URLs.
• Thoroughly test URL handling code in different scenarios.
• Use a framework that provides URL routing and handling features to simplify URL management.

Other helpful code samples for getting the full URL or current page URL in PHP

In Php , in particular, get url php

$url = "http://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];

In Php case in point, get url with php code example

$actual_link = (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? "https" : "http") . "://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]"; 

In Php , get url link in php code example

actual_link = (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? "https" : "http") . "://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

In Php as proof, get from link php code example

Conclusion

In this article, we discussed the best practices for mastering URL handling in PHP. We covered how to get the full URL or current page URL using the $_SERVER superglobal variable, extracting data from the URL using the $_GET superglobal array and parse_url() function, and other helpful tips for URL handling. By following these best practices, you can ensure that your PHP application handles URLs efficiently and securely.

Frequently Asked Questions — FAQs

What is the $_SERVER superglobal variable in PHP, and how is it used to get the full URL or current page URL?

The $_SERVER superglobal variable in PHP is an array that contains information such as headers, paths, and script locations. To get the full URL or current page URL in PHP, we can use $_SERVER[‘HTTPS’], $_SERVER[‘REQUEST_URI’], and $_SERVER[‘SERVER_PORT’] to construct the URL string.

How do I extract data from the URL in PHP using $_GET and parse_url()?

To extract data from the URL in PHP, we can use the $_GET superglobal array to retrieve parameters passed in the URL query string. We can also use parse_url() to break down a URL into its components, such as scheme, host, and path.

What is the importance of sanitizing and validating user input from the URL in PHP?

Sanitizing and validating user input from the URL is crucial in preventing security vulnerabilities such as SQL injection. Attackers can inject malicious code into the URL query string, potentially compromising the security of the application.

How can I use regular expressions and the preg_match() function to extract data from the URL’s path in PHP?

Regular expressions are patterns used to match character combinations in strings. We can use the preg_match() function in PHP to apply regular expressions and extract data from the URL’s path.

What are URL rewriting techniques, and how can they create more user-friendly URLs in PHP?

URL rewriting techniques involve modifying the URL structure to create more user-friendly and search engine-friendly URLs. This can include removing file extensions or replacing query strings with more descriptive keywords.

Why is it important to test URL handling code thoroughly in different scenarios?

Testing URL handling code thoroughly is crucial in ensuring the stability and security of the application. Different scenarios, such as various input combinations and edge cases, should be tested to identify and fix any potential issues.

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