php superglobals

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1#Superglobal
2
3$_SERVER Superglobal
4Superglobals were introduced in PHP 4.1.0, and are built-in variables 
5  that are always available in all scopes. Basically system variables.
6https://www.w3schools.com/php/php_superglobals.asp
7
8Note: $_SERVER Superglobal  -- tells a little about the server and 
9  the client
10
11==============
12#Example index.php
13<?php include 'server-info.php';?>
14<!DOCTYPE html>
15<html>
16<head>
17    <title>System Info</title>
18    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
19</head>
20<body>
21<div class ="container">
22    <h1>Server & File Info</h1>
23    <?php if($server): ?>
24    <ul class="list-group">
25    <?php foreach($server as $key => $value): ?>
26        <li class="list-group-item">
27            <strong><?php echo $key; ?>: </strong>
28            <?php echo $value; ?>
29        </li>
30    <?php endforeach; ?>
31    </ul>
32
33    <?php endif; ?>
34
35    <h1>Client Info</h1>
36    <?php if($client): ?>
37    <ul class="list-group">
38    <?php foreach($client as $key1 => $value1): ?>
39        <li class="list-group-item">
40            <strong><?php echo $key1; ?>: </strong>
41            <?php echo $value1; ?>
42        </li>
43    <?php endforeach; ?>
44    </ul>
45
46    <?php endif; ?>
47
48</body>
49</html>
50==================
51#Example server-info.php
52<?php
53    # $_SERVER SUPERGLOBAL
54
55    //Create Server Array
56    $server =[
57        'Host Server Name' => $_SERVER['SERVER_NAME'],
58        'Http Host' => $_SERVER['HTTP_HOST'],
59        'Server Software' => $_SERVER['SERVER_SOFTWARE'],
60        'Document Root' => $_SERVER['DOCUMENT_ROOT'],
61        'Current Page' =>  $_SERVER['PHP_SELF'],
62        'Script Name' =>  $_SERVER['SCRIPT_NAME'],
63        'Absloute Path' =>  $_SERVER['SCRIPT_FILENAME']
64
65    ];
66
67    echo $server['Host Server Name'];
68    echo $server['Http Host'];
69    echo $server['Server Software'];
70    echo $server['Document Root'];
71    echo $server['Current Page'];
72    echo $server['Script Name'];
73    echo '<br>';
74    //also can show it all
75    print_r($server);
76
77    //Creat Client Array
78    $client = [
79        'Client System Info' => $_SERVER['HTTP_USER_AGENT'],
80        'Client IP' => $_SERVER['REMOTE_ADDR'],
81        'Remote Port' => $_SERVER['REMOTE_PORT']
82
83    ];
84    echo '<br>';
85    echo '<br>';
86    print_r($client);
87
88?>

1echo "dsd";
2

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