I figured it's time to make a small tutorial , by reading this tutorial you should have the basic know how to execute small script's on your php enabled servers. Note that i will not be explaining how to set up a web server + php.
What Does PHP Stand For?
PHP-
Hypertext
Preprocessor
Starting & Ending Tags
We start off by learning the 2 main tag's that you must never forget , that is the starting and ending tag's.
Starting Ending Baisc Syntax
Now that you know about the starting & ending tag's , let's start with a basic script.
Code:
<?php
echo "This is my first php script!";
?>
so you have noticed echo , echo is simple, it output's the text "This is my first php script!" , now you must end this with a semicolon , why? the semicolon is a seperator and is used to distinguish one set of instructions from another.
Variables
Now that you know some basic syntax let's start working on variables , variables are ton's of fun and one of the most important part's of PHP.
Code:
<?php
$myfirstscript = "This is my first php script!";
echo $myfirstscript;
?>
So you have noticed $myfirstscript , i made the variable $myfirstscript that hold's the string "This is my first php script!" . Then ofcourse just echo'd the variable which would output "This is my first php script!".
Comments
Comments are also another important thing not only in php but all languages , there used to disable any type of information inside them from actually executing with your script which ofcourse would likely cause error's.
Code:
//This is a comment
/*This is
a
comment block*/
Condition Statements
Now these are fun to play with , they are used to execute certain code on a condition.
Code:
<?php
$mybrowser = "Fire Fox";
if ($mybrowser == "Fire Fox") { echo " You are using firefox!"; }
else { echo " You are not using firefox"; }
?>
So here i have set a variable equal to my browser then made a condition, if my browser is equal to firefox, output "You are using firefox" else (if your using something else) output "You are not using firefox" . Ofcourse this will not work untill i i add more to it but it give's you all a idea how condition statements work.
Looping
Looping is used for many many thing's , there are more then just one loop statement, ill explain how to do the "While Loop".
Code:
<?php
$z = 1;
while ($z <= 5) {
echo $z;
$z++
}
Again i made a variable named z with the value of 1 , then stated while z is less or equal to 5
output the value of z
, increase z by 1
. Which would output 1-5 on your page. Simple isn't it?
Forms
Now im assuming you have some basic understanding of html, although i will give an example of the html form but i will not be explaining it.
Code:
<form action="form.php" method="post">
Name: <input type="text" name="name">
<input type="submit" value="Submit">
That's the html form , very simple. Now to the fun part.
Code:
<?php
$name = $_POST["name"];
echo "Hello ". $name;
?>
Now here you have noticed something new and that would be "$_POST["name"]", $_POST is a variable already set by php , it recieved the information givin in the html form , notice the name="name" in the html form and ["name"] in $_POST.
Now this is the end of this small basic tutorial , you should now have the knowledge to execute simple script's on your server's.
Linear Mode
