How php works

HOW

PHP
WORKS ?

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Client
User requests a PHP page or a HTML page that includes a PHP
Script Web Server
Hello world I Via HTTP.
am a PHP Code
Server responds to the request by sending the generated
HTML page to the User. <html>
<head>
<title> PHP to
HTML</title>
</head>
<body>
<h1> Hello world
I am a PHP
Code </h1>
If a PHP page is requested, server passes </body>
the PHP page to the PHP script engine. </html>

#hello world PHP script.
The PHP engine
<?php
parses the given
echo ‚<h1> Hello World I am a PHP PHP script and
Code</h1>‛; Converts it into HTML
?>
And send’s it to the
browser as shown
Above.
PHP SCRIPT ENGINE


Client
User requests a PHP page or a HTML page that includes a PHP
Script Web Server
Robinson Via HTTP.

Server responds to the request by sending the generated
HTML page to the User. <html>
<head>
<title> PHP to
If a PHP page is requested, server passes
HTML</title>
the PHP page to the PHP script engine. </head>
<body>
#DataBase PHP script. <h1> Robinson</h1>
<?php </body>
$q = ‘SELECT fn FORM persons’; </html>
//run the query
$r = mysqli_query($dbc, $q);
//fetch the data
While($re = mysqli_fetch_array($r)){
echo ‚<h1>{$re[‘fn’]}</h1>‛; The PHP engine
} parses the given
?> PHP script and
Converts it into HTML
And send’s it to the
PHP engine send’s the query to the MySQL DB engine. browser as shown
(SELECT fn FROM persons); Above.
PHP SCRIPT ENGINE

Returns the result of the query (Robinson)
DATABASE

How php works

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