why PHP is different from other , and why it is mostly recommended
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7 Answers
The PHP software works with the web server, which is the software that delivers web pages to the world. When you type a URL into your web browser's address bar, you're sending a message to the web server at that URL, asking it to send you an HTML file. The web server responds by sending the requested file. ... php or .
PHP is server side programming language, here the following charactersitcs:
- PHP is acronym for "Hypertext Preprocessor"
- it is widely-used, open source-server side scripting language
- PHP script are executed on the server.
- PHP cost nothing, it is free to use.
- PHP is a efficient alternative to competitors such as Microsoft's ASP.
- PHP file can contains text, HTML, CSS, JavaScript and PHP Code.
- PHP file extension .php
- PHP code are executed on the server, and the result is returned to the browser a plain HTML
- PHP can contain dynamic page content
- PHP can create, open, read, write and close files on the server
- PHP can add, delete, modify data in your database
- PHP can restrict users to access some pages on your website.
- PHP can encrypt data
- PHP runs various platform (Windows, Linux, Unix, Mac OS X, etc.)
- PHP is compatible with almost all servers used today (Apache, IIS, etc.)
- PHP Support a wide range of databases.
- PHP is secure
- PHP is easy to learn and runs efficiently on the server side.
PHP (Hypertext Preprocessor) is a server-side scripting language widely used for web development. It works by enabling the execution of code on the server before the web page is sent to the user's browser. Here's a simplified overview of how PHP works in a web context:
1. **Embedding PHP in HTML:**
- PHP code is typically embedded within HTML files. PHP code is enclosed within `<?php` and `?>` tags. These tags indicate where PHP code begins and ends.
```php
<!DOCTYPE html>
<html>
<head>
<title>PHP Example</title>
</head>
<body>
<?php
// PHP code goes here
echo "Hello, World!";
?>
</body>
</html>
```
2. **Client Request:**
- When a user requests a web page that contains PHP code, the request is sent to the web server.
3. **Server Processing:**
- The web server recognizes the PHP code within the requested file. It passes the PHP code to the PHP interpreter installed on the server.
4. **PHP Interpreter:**
- The PHP interpreter processes the PHP code, executing the instructions and generating dynamic content.
5. **Server Response:**
- The server compiles the HTML output generated by PHP along with any other static content in the file.
6. **Client Receives Response:**
- The compiled HTML is sent as the server's response to the user's browser.
7. **Browser Rendering:**
- The user's browser receives the HTML response and renders the web page. From the user's perspective, the PHP code's execution is transparent; they see only the resulting HTML.
**Example: Dynamic Content Generation**
```php
<?php
$name = "John";
$greeting = "Hello, $name!";
?>
<!DOCTYPE html>
<html>
<head>
<title>Dynamic Content Example</title>
</head>
<body>
<p><?php echo $greeting; ?></p>
</body>
</html>
```
In this example, PHP dynamically generates a personalized greeting based on the value of the `$name` variable. The resulting HTML sent to the browser might look like:
```html
<!DOCTYPE html>
<html>
<head>
<title>Dynamic Content Example</title>
</head>
<body>
<p>Hello, John!</p>
</body>
</html>
```
PHP is commonly used for tasks such as database access, form handling, session management, and other server-side functionalities. Its ability to seamlessly integrate with HTML makes it a powerful tool for building dynamic and interactive web applications.
1. **Embedding PHP in HTML:**
- PHP code is typically embedded within HTML files. PHP code is enclosed within `<?php` and `?>` tags. These tags indicate where PHP code begins and ends.
```php
<!DOCTYPE html>
<html>
<head>
<title>PHP Example</title>
</head>
<body>
<?php
// PHP code goes here
echo "Hello, World!";
?>
</body>
</html>
```
2. **Client Request:**
- When a user requests a web page that contains PHP code, the request is sent to the web server.
3. **Server Processing:**
- The web server recognizes the PHP code within the requested file. It passes the PHP code to the PHP interpreter installed on the server.
4. **PHP Interpreter:**
- The PHP interpreter processes the PHP code, executing the instructions and generating dynamic content.
5. **Server Response:**
- The server compiles the HTML output generated by PHP along with any other static content in the file.
6. **Client Receives Response:**
- The compiled HTML is sent as the server's response to the user's browser.
7. **Browser Rendering:**
- The user's browser receives the HTML response and renders the web page. From the user's perspective, the PHP code's execution is transparent; they see only the resulting HTML.
**Example: Dynamic Content Generation**
```php
<?php
$name = "John";
$greeting = "Hello, $name!";
?>
<!DOCTYPE html>
<html>
<head>
<title>Dynamic Content Example</title>
</head>
<body>
<p><?php echo $greeting; ?></p>
</body>
</html>
```
In this example, PHP dynamically generates a personalized greeting based on the value of the `$name` variable. The resulting HTML sent to the browser might look like:
```html
<!DOCTYPE html>
<html>
<head>
<title>Dynamic Content Example</title>
</head>
<body>
<p>Hello, John!</p>
</body>
</html>
```
PHP is commonly used for tasks such as database access, form handling, session management, and other server-side functionalities. Its ability to seamlessly integrate with HTML makes it a powerful tool for building dynamic and interactive web applications.