Basics for beginners
Programming language PHP for web development
Php: Hypertext Preprocessor
What do you need to get started?
TRY IT!
Download Example
https://docs.google.com/file/d/0B7SlVynBEEAbZ3dzd2FjQ0R1Y00/edit
Semicolon:
How to add comments?
Programming language PHP for web development
Php: Hypertext Preprocessor
- Php is a server-side scripting language
- Open source
- Easy to use
- Community support
- Supports databases such as MySQL
What do you need to get started?
- Operating system
- Web server
- Php interpreter
- Database engine such as MySQL
- Php always starts with <?php and ends with ?>
- Php file must have a .php extension
- Php code is inside the HTML tags
Example1: Displaying text in your browser
<html>
<body>
<?php echo "Lets learn php"; ?>
</body>
</html>
TRY IT!
Download Example
https://docs.google.com/file/d/0B7SlVynBEEAbZ3dzd2FjQ0R1Y00/edit
Semicolon:
- Each php line must end with a semicolon
- It is a separator used to identify end of a php statement
- Used to output text
How to add comments?
// Single line comment
/* text here */ Multi-line comment
<!-- text here --> Html
Example
<html>
<body>
<?php
// this is a single line comment
/*this
is a multi-line
comment */
?>
</body>
</html>
White Space
/* text here */ Multi-line comment
<!-- text here --> Html
Example
<html>
<body>
<?php
// this is a single line comment
/*this
is a multi-line
comment */
?>
</body>
</html>
White Space
- White does not matter in coding, it is totally ignored.
- It is okay to have one line of php code, then 15 lines of blank space before the next php line of code.
- Example:
<?php
echo "hallo";
echo "world";
?>
Escaping
special characters
- NB to use double quotations
\n
|
A
line feed character
|
\t
|
Tab
|
\r
|
Carriage
return
|
\”
|
Double
quotation
|
\’
|
Single
quoatation
|
To
be printed “as is”
Example 2
<?php
echo “You said \”Hallo\””;?>
Example 3
Use <pre> tags to display a linefeed
<pre>
<?php
echo “Welcome\nto\nPHP”;?>
</pre>
