If you have ever changed your website’s domain name, you know how important it is to redirect visitors from the old domain to the new one. This ensures that visitors who have bookmarked your site or found it through search engines are not met with a 404 error page, and instead are redirected to your new site. In this article, we’ll explore how to redirect a domain name to a new one using PHP.
First, let’s take a look at the code that is used for redirecting a domain name to a new one using PHP.
<?php $url = $_SERVER['REDIRECT_SCRIPT_URI']; $domain = parse_url($url, PHP_URL_HOST); $newDomain = "newdomain.com"; $newUrl = str_replace($domain, $newDomain, $url); header("HTTP/1.1 301 Moved Permanently"); header("Location:$newUrl"); exit();
The above code does the following:
- It gets the current URL of the page using the
- It extracts the domain name from the URL using the
parse_url()function and stores it in the
- It sets the new domain name in the
- It replaces the old domain name with the new domain name using the
str_replace()function and stores the new URL in the
- It sends an HTTP 301 status code using the
header()function to indicate that the redirect is permanent.
- It sends a
Locationheader using the
header()function with the new URL to redirect the user to the new domain.
- It terminates the script using the
Now, let’s discuss each step in more detail.
Step 1: Get the Current URL
$_SERVER['REDIRECT_SCRIPT_URI'] variable is used to get the current URL of the page. This variable contains the URL that was requested by the client, including any redirect that may have occurred.
Step 2: Extract the Domain Name
parse_url() function is used to extract the domain name from the current URL. This function parses a URL and returns an associative array containing its various components, such as the scheme (http or https), the host (domain name), and the path. The
PHP_URL_HOST constant is used to extract the host from the array.
Step 3: Set the New Domain Name
The new domain name is then assigned to the
$newDomain variable. This is the domain name that you want to redirect your visitors to.
Step 4: Replace the Old Domain Name with the New Domain Name
str_replace() function is used to replace the old domain name (stored in the
$domain variable) with the new domain name (stored in the
$newDomain variable). This creates a new URL with the updated domain name.
Step 5: Send an HTTP Redirect Header
header() function is used to send an HTTP redirect header to the client’s browser, instructing it to navigate to the new URL. The “HTTP/1.1 301 Moved Permanently” header specifies that the redirect is permanent, which means that clients may cache the redirect and automatically navigate to the new URL in the future. The “Location” header specifies the new URL, and the
exit() function is used to terminate the script immediately.
In conclusion, redirecting a domain name to a new one using PHP is a simple process that can be done using a few lines of code. It’s an important step
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