$_Server php

Php server name

echo $_SERVER['PHP_SELF'];
echo "<br>";
echo $_SERVER['SERVER_NAME'];
echo "<br>";
echo $_SERVER['HTTP_HOST'];
echo "<br>";
// echo $_SERVER['HTTP_REFERER'];
echo "<br>";
echo $_SERVER['HTTP_USER_AGENT'];
echo "<br>";
echo $_SERVER['SCRIPT_NAME'];

Php referer url

$_SERVER['HTTP_REFERER'];

$_Server php

<?php
echo $_SERVER['PHP_SELF'];
echo "<br>";
echo $_SERVER['SERVER_NAME'];
echo "<br>";
echo $_SERVER['HTTP_HOST'];
echo "<br>";
echo $_SERVER['HTTP_REFERER'];
echo "<br>";
echo $_SERVER['HTTP_USER_AGENT'];
echo "<br>";
echo $_SERVER['SCRIPT_NAME'];
?>

Php server function

<?php
  // PHP $_SERVER['...']; method
  
  // PHP file name
  echo 'PHP file name: '.$_SERVER['PHP_SELF'].'<br>';
  // Server name
  echo 'Server name: '.$_SERVER['SERVER_NAME'].'<br>';
  // HTTP host
  echo 'HTTP host: '.$_SERVER['HTTP_HOST'].'<br>';
  // Refering link
  echo 'Refering link: '.$_SERVER['HTTP_REFERER'].'<br>';
  // User agent
  echo 'User agent: '.$_SERVER['HTTP_USER_AGENT'].'<br>';
  // Script name
  echo 'Script name: '.$_SERVER['SCRIPT_NAME'];
  
  // The rest is optional

  if($_SERVER['PHP_SELF']=='/filename.php'){
    //If there is no folder
    echo 'No folder'.$_SERVER['PHP_SELF'];
  } else{
    // Echo the name of the folder containing the PHP file
    echo 'PHP file name: '.$_SERVER['PHP_SELF'];
  }
  
  // The same if statements can be used for the script name
  
  if($_SERVER['SCRIPT_NAME']=='/filename.php'){
    // If there is no folder
    echo 'No folder'.$_SERVER['SCRIPT_NAME'];
  } else{
    // Echo the name of the folder containing the PHP file
    echo 'PHP file name: '.$_SERVER['SCRIPT_NAME'];
  }
  
  echo '<a href="repl.it/@CoolWebDev">More from me...</a>';
  
  // I hope you found this helpful! 
?>

$_Server php

<?php
echo $_SERVER['SERVER_NAME'];
?>

Php $_SERVER

<?php
/*
Sometimes you will find that your website will not get the correct user IP after adding CDN, then this function will help you
*/
function real_ip()
{
   $ip = $_SERVER['REMOTE_ADDR'];
    if (isset($_SERVER['HTTP_X_FORWARDED_FOR']) && preg_match_all('#\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}#s', $_SERVER['HTTP_X_FORWARDED_FOR'], $matches)) {
        foreach ($matches[0] AS $xip) {
            if (!preg_match('#^(10|172\.16|192\.168)\.#', $xip)) {
                $ip = $xip;
                break;
            }
        }
    } elseif (isset($_SERVER['HTTP_CLIENT_IP']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $_SERVER['HTTP_CLIENT_IP'])) {
        $ip = $_SERVER['HTTP_CLIENT_IP'];
    } elseif (isset($_SERVER['HTTP_CF_CONNECTING_IP']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $_SERVER['HTTP_CF_CONNECTING_IP'])) {
        $ip = $_SERVER['HTTP_CF_CONNECTING_IP'];
    } elseif (isset($_SERVER['HTTP_X_REAL_IP']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $_SERVER['HTTP_X_REAL_IP'])) {
        $ip = $_SERVER['HTTP_X_REAL_IP'];
    }
    return $ip;

}
echo real_ip();

?>

Source: php.net

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