–
is a general-purpose server-side scripting language originally
designed for Web
development to produce dynamic Web pages.
–
first developed server-side scripting languages
to be embedded into an HTML source
document rather than calling an external file to process data.
2. PHP Basic Syntax Rules
–
PHP statements should be enclosed with either of these php tags:
<?php ?>
<script language=“php”> </script>
<? ?>
<%
%>
–
Dynamic variable starts with a $(dollar sign)
–
PHP is case-sensitive.
–
Each statement ends with a semicolon.
–
To group statements, use curly braces.
–
To tell PHP that the statement is a comment, use
either of these symbols.
–
//
single line comment /* multiline
comments*/
Note: More rules as we go along.J
3. PHP Program Structure
embedded structure
<?php
//statements…..
?>
class
structure
<?php
class
<classname>{
//variables…
//functions…
}
?>
4. Displaying
text on the screen
<?php
echo “Hello
World”;
?>
5. Variable Data Types
A holder for a type of data.
–
numbers,
–
strings of characters,
–
objects,
–
arrays,
–
booleans.
Loosely typed
–
Takes the type of the value that is assigned to
it
In PHP, you can assign value to a
variable without declaring it.
