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PHP

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PHP is one of many interpreted languages written in C.

Development Environment

php cli

  • php -l check syntax
  • php -v version
  • php -e oneliner
Xochipilli says
Many Linux distributions package the PHP CLI separately

Pear/Pecl

Your first application

Variables and data types

Boolean Logic

Loops

Ternary Conditionals

User Input

User-Defined Functions

Defining functions in PHP is accomplished using the ``function keyword, followed by the function name and comma delimited arguments, surrounded by parenthesis:

 
function myFunction(arg1, arg2) {
...
}
 

If the function is encapsulated in an object, you may specify the visibility of the function, public, protected or private.

 
class MyClass
{
    public function myFunction(arg1, arg2) {
    ...
    }
...
 

Unlike languages, such as Perl or Python, PHP member functions implicitly extract their parent into the $this variable.

Security

  • Type Handling
  • XSS
  • SQL Injection