PHP/Basic Code

From r00tedvw.com wiki
Jump to: navigation, search

Contents

Basics

.php
all PHP pages end with the .php extension, this tells the browser there is php code in the file.
//
comments in PHP are defined with a double-forward slash "//"
unlike most other comments which have delimiters both before and after comments, PHP does not, the "//" is defined at the beginning of the comment and the rest of the line is then included as part of the comment.

delimiters - start & stop

<?php
all php code begins with this.
?>
all php code ends with this

output text

echo
just like with scripting, echo can be used to output text
ie.
<p>
 <?php
   echo "My first line of PHP!"; 
 ?>
</p>

Arithmetic

php is capable of doing basic arithmetic, take the following for example using "echo"

<?php
 echo 17 * 123;  
?>
Outputs: 2091

Operators

concatenation

joins strings together
<?php
 echo "Hello," . " " . "world" . "!";
?>
----
Outputs: Hello, world!

Each string above is defined between double quotes. The "dots" are between them and combine them together to form 1 long string.

Variables

Variables in php are stored the same way as bash scripting, the variable name being defined by starting with a "$"

ie.
<?php
 $myName = "r00tedvw";
 echo $myName;
?>

Comparisons

>
Greater than
<
Less than
<=
Less than or equal to
>=
Greater than or equal to
==

Equal to

!=
Not equal to

If/Else

example:

<?php
  if (this condition is true) {
    // do this code
  }
  else {
    // do this code instead
  }
?>

<?php
       // Write your if/elseif/else statement here!
       $myAge = 34;
       if ($myAge < 30) {
           echo "The condition is true";
       }
       else {
           echo "The condition is false";
       }
?>

Personal tools
Namespaces

Variants
Actions
Navigation
Mediawiki
Confluence
DevOps Tools
Ubuntu
Oracle Linux
AWS
Windows
OpenVPN
Grafana
Pivotal
osTicket
OTRS
phpBB
WordPress
VmWare ESXI 5.1
Crypto currencies
HTML
CSS
Python
Java Script
PHP
Raspberry Pi
Canvas LMS
Kaltura Media Server
MetaSploit
Zoneminder
Photoshop CS2
Fortinet
Uploaded
Certifications
General Info
Games
Meal Plans
NC Statutes
Toolbox