PHP

Basics:

The PHP portion of code looks like this:
< ? php
? >

Each line of code is ended with " ; "

To declare a variable with PHP you declare it as you need it. This is done with a " $ "

Example: $txt = "Hello World!";
PHP will automatically assign the variable a type: string, integer etc.

Putting a (.) into a line of code will concat two variables. Example:
< ? php
$txt1="Hello World";
$txt2="1234";
echo $txt1 . " " . $txt2;
? >

The output of the code above will be:

Hello World 1234

Other Functions:
Strlen: finds string length
echo strlen("Hello world!");
Strpos: finds specified string in another string:
< ? php
echo strpos("Hello world!","world");
? > The output of the code above will be: 6