Basics of PHP

Written By: Ryan “boxdain” Macy

- 19 May 2006 -

Description: This intro to PHP covers syntax, variables, operators, condition statements, and an intro to arrays.

  1. Basic Syntax
  2. Variables and Operators
  3. Condition Statements
  4. Arrays

Variables

Variables are a way to store data so you don't constantly input data over and over. It will help reduce your workload, but here are a few rules to remember:

Here is the syntax of a simple variable:

$A_Variable

You can assign a string to a variable like so:

$A_Variable = "a string";

You can also use the print function as we discussed earlier.

$A_Variable = "a string";
print "$A_Variable = ". $A_Variable;

what you should get:

$A_Variable = a string;

See how easy that was. Now I bet you realizing the potential variables have. Since I have just used a operator ( = ) lets go into detail about them....

Operators

You already have seen an operator (=) which is a assignment operator. Here is a list of the most common operators:

Arithmetic operators
     + is addition
     - is subtraction
     * is multiplication
     / is division

Comparison operators
     == is same as or equal to
     != is not the same or equal to
     > is greater than
     < is less than
     >= is greater than or equal to
     <= is less than or equal to

Increment/decrement operators
     ++ is add one
     -- is subtract one

They are really self explanatory so hopefully you got them down pat! Right now lets move onto if else and elseif statements!

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