PHP how to access class constants

Get user IP address in PHP

  1. Use to find the user's IP address in PHP
  2. Use, and to find the user's IP address
  3. Use the ternary operator and function to determine the user's IP address

We're going to present a way to access the user's IP address from a server in PHP using the superglobal variable, where the only array element is. It is used as a.

We'll show another way to use the conditional expression to access the user's IP address in PHP to verify that the user's IP addresses are from the shared internet, from a proxy, or the actual IP address. This method uses array elements such as, and.

We are going to show you a quick way to get the user's IP address in PHP using the ternary operator and function. This method also uses the array elements like, and in the superglobal variable.

Use to find the user's IP address in PHP

We can use the expression to determine the IP address from which the user is accessing the current page. is the super global variable in PHP and takes a variety of array elements as arguments. We'll use that as an array element in the variable to access the client's actual IP address. Please note that the correct IP address of the client is not always given in all cases. We will discuss the other cases below. Make sure your Server API (SAPI) is well configured so that the above expression will return the actual IP of the connection.

In the following example, the is used as the server. Thus the loopback IP address is returned. For information on the loopback address, see here. For example, suppose the url of the following PHP script is. It outputs the IP address of the local computer as. is the IPv6 representation of the.

For example, assign this to a variable. Then print the variable with the.

Sample code:

Output:

Use, and to find the user's IP address

We can use the array elements of superglobal variables like, and to determine the IP address of the user in PHP. Use to determine the actual IP address of the user. Use to find out the IP address if the user is accessing the page over the shared internet. Use to find out the IP address if the user is using a proxy to access the webpage. Note that headers like and can be forged as anyone can set it. Sometimes they may not represent the actual IP address of the client.

For example, use the function to check if something contains. If it contains, assign the valley in the variable and press i. Check again for, assign the value, and print out if there is one. Do a similar operation for.

The following example,, returns the IP address because the user is not using proxies or shared Internet connections. Further information on the array can be found in the [PHP manual].

Sample code:

Output:

Use the ternary operator and function to determine the user's IP address

We can use a shorthand method to get the user's IP address in PHP using the ternary operator. With this method, the method checks whether the array contains the specified elements or the header files.

For example, use the function to check if the array contains. If the condition is met, it is set. If the condition fails, the function checks whether the array contains. If the condition is met, it is set in a similar manner and if the condition fails.

In the following example, the client is not using a proxy or a shared internet. Therefore is carried out. Please check the [MSDN Web Documents] for information on the ternary operator.

Sample code:

Output: