PHP $_SERVER详细用法分析

PHP $_SERVER详细用法分析

Argument           Result

PHP_SELF           Returns the path and filename of the current script
SERVER_PROTOCOL    Returns the name and revision of the page-requested protocol
REQUEST_METHOD     Returns the request method used to access the page
REQUEST_TIME       Returns the timestamp from the beginning of the request
DOCUMENT_ROOT      Returns the root directory of the current script
HTTP_REFERER       Returns the page address that referred to the current page
HTTP_USER_AGENT    Returns the user agent of the header from the current request
REMOTE_ADDR        Returns the IP address of the current user
REMOTE_PORT        Returns the port of the user's machine that is accessing the page
SCRIPT_FILENAME    Returns the absolute filename from the current script
SCRIPT_NAME        Returns the path of the current script

<?php教程 if ($_SERVER['REQUEST_METHOD'] == 'GET') { ?>
<form action="<?php echo $_SERVER['SCRIPT_NAME'] ?>" method="post">
What is your first name?
<input type="text" name="first_name" />
<input type="submit" value="Say Hello" />
</form>
<?php } else {
    echo 'Hello, ' . $_POST['first_name'] . '!';
}
?>

获取用户的IP地址

<?php

$address = $_SERVER['REMOTE_ADDR'];
$referer = $_SERVER['HTTP_REFERER'];
$browser = $_SERVER['HTTP_USER_AGENT'];

$file = fopen("log.html",  "a"); 

$time = date("H:i dS F");
fwrite( $file, "<b>Time:</b> $time<br>" );

if( $address != null)
{
  fwrite( $file, "<b>IP Address:</b> $address <br>");
} 

if( $referer != null)
{
  fwrite( $file, "<b>Referer:</b> $referer<br>"); 
}

fwrite( $file, "<b>Browser:</b> $browser<br/><hr>"); 

fclose($file);

?>

脚本显示方法

<?php
$lastmod = filemtime($_SERVER['SCRIPT_FILENAME']);

echo 'file was updated on ' . date('l d F Y, at H:i:s T', $lastmod);
?>

获取服务器时间

<?php
 
  $lastmod = filemtime($_SERVER['SCRIPT_FILENAME']);

  echo 'This file was last updated on '
        . date('l d F Y, at H:i:s T', $lastmod)
        . '.';
?>