. PHP
- , HTTP- , -, HTTP-, HTML-, , , - .
- .
- , -, , .
- URL - .
- :
;
;
;
HTTPS .
HTTPS HTTP, . , HTTP, SSL TLS, .
HTTP, HTTPS TCP 443 ( HTTP 80). Netscape Communications Corporation, .
HTTPS , , , . ,
HTTPS .
https . HTTP, SSL TLS. , . . man-in-the-middle (, ).
HTTPS - 40, 56, 128 . , , 1024 . 128 HTTPS . , 40 ( IE). . , , , HTTPS . .
-, 90 % , :
Apache -, Unix- .
IIS Microsoft, Windows NT.
- :
-
-
|
|
- WAP
PHP
PHP : Web- . , web-, .
, PHP, , , . , PHP , *nix-. CORBA COM , PHP-GTK. PHP :
;
- GUI PHP-GTK;
Windows Linux
php- . , .php, web- PHP html-. , HTML, .php PHP, . PHP, PHP , 4 ( ):
1. XML:
2. <?php
3.... ?>
4. SGML:
5. <?
6.... ?>
7. HTML:
8. < script language = " php ">
9....</ script >
10. ASP:
11. <%
12.... %>
XML SGML.
, - PHP, , ( .2.). .., :
<?
if (5<3) {
echo ("<p>Hello, world!<p>");
?>
<p>Hello!</p>
// PHP
//
<?
echo ("<p>Hello, world!<p>");
}
?>
echo PHP , web- (, HTML, ). , , .
PHP
PHP, , .
, , .
PHP (C, Java, Perl). , PHP html . PHP :
<?php
?>
:
<?
?>
, (..?php), . , .
PHP
|
|
PHP , HTML , , .php, .html. , . , index.html index.php.
html PHP
, php . :
<html>
<head>
<title>My First PHP Page</title>
</head>
<body>
<?php
echo "Hello World!"
?>
</body>
</html>
:
Hello World!
(, helloworld.php) PHP, , Hello World!. , , , . .
echo, Hello World!. , , .
!
, PHP. PHP . , Hello World! , .
<html>
<head>
<title>My First PHP Page</title>
</head>
<body>
<?php
echo "Hello World! ";
echo "Hello World! ";
echo "Hello World! ";
echo "Hello World! ";
echo "Hello World! ";
?>
</body>
</html>
:
Hello World! Hello World! Hello World! Hello World! Hello World!
HTML, PHP . 20 , , , , . (Tab).
<html>
<head>
<title>My First PHP Page</title>
</head>
<body>
<?php
echo "Hello World!";
echo "Hello World!";
?>
</body>
</html>
:
Hello World!Hello World!
. php html , .php. , echo.
PHP . ++ (//), PHP , . (/**/). (#) ( UNIX).
<php
echo ("<p>Hello</p>"); //
echo ("<p>Hello</p>"); #
/*
*/
?>
, PHP PHP. PHP , , , html-. :
<php
echo ("<p>Hello</p>"); //
?>
// .
<!-- HTML.
HTML, -->
, , , , :
<?
$a = " Hello, world ";
echo strstr
|
|
//
?>
($), - , . , : $n, $n1, $user_func_5 . . , - PHP , . . $user, $User $USER .
<?php
$user = "";
$User = "";
$USER = "";
echo $user; //
echo $User; //
echo $USER; //
?>
, .
, =, . .
<?php
$number = 1;
$var = 3.14;
?>