$abc = "abc.jpg";
$def = explode('.', $abc);  converts string to array
$ghi = end($def); - display last in tha array
echo $ghi;

in_array("23", $people)-check in array

trim(string,charlist) -remove white space

global $x, $y; $GLOBALS['y'] = $GLOBALS['x'] + $GLOBALS['y'];

@ - error control operator

htmlspecialchars($str) - shows the html itself without converting

serialize
encode

When the left part is an object instance, you use ->. Otherwise, you use :: 

strip_tags()- t

extract()


htmlspecialchars - HTML escaped code

These variables are called attribute of the object once an object is created.


-------------


	                          	OOPS

Member variable - variable inside class
Member function - function inside class


Abstract class - cannot be instantiated (obj), only inherited (sub class)

Static Keyword-*Declaring class members or methods as static makes them accessible without needing an instantiation of the class.
*A member declared as static can not be accessed with an instantiated class object (though a static method can).

Final Keyword-prevents child classes from overriding a method


Static class method:

add_filter( 'media_upload_newtab', array( 'My_Class', 'media_upload_callback' ) );

Instance method:

add_filter( 'media_upload_newtab', array( $this, 'media_upload_callback' ) );


--------------------

you can make it static variable, so you will be able to call it anytime anywhere, the diff is that instead of

$this->lang;

when editing it(Works inside class game only) you do :

self::$lang;
and when you call/edit it (Works everywhere) from anther class you do :

game::$lang


-----------------

private - class
protected - class, sub class
public - class, sub class, object


$var = "way";
echo "Two {$var}s to define a variable in a string.";


---------

git clone URL
1.git pull orgin master

git config - user name nd pwd

git branch
git status
git commit -m "msg" {wpcontent} - replacing existing files
git add {filepath} - adding new files
git commit
git status
git push orgin master

Codeignitor

DB config - /applications/config/database.php
Base URL config - /applications/config/config.php
Route config - /applications/config/routes.php
Autoload files - /applications/config/autoload.php

Controller:
class Page extends CI_Controller 

		$this->load->model('users');
		$this->load->view($data['theme'].'/page', $data);

Google Crawl

Onload

      window.addEventListener("load",foo);
      window.addEventListener("load",bar);
      function foo(){
        alert("this");
      }
      function bar(){
        alert("that");
      }



window.onload = function () { .... };

Dynamic class method invocation in PHP

Closure

$msg = 'Hello';

 $closure = function () use ($msg) {

    var_dump($msg);

 };

 $closure();

Tips

Upgrading xampp PHP version on windows

Interface - OOPS

Implements Interface is like blue print of class.
eg: interface aaa{
	public function bb(){}
}

class implementing the aaa should have bb() function else will throw an error.
class abc implements aaa{
	public function bb(){
		echo "bb";
	}
}

REST(Represententional State Transfer) API

JSON

Consuming API

JOOMLA

Error Reporting

Use php_value in .htaccess:

ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

error_reporting(E_ALL & ~E_NOTICE);

Php Functions

Difference between composer prefer-dist and prefer-source?

Socail media share

convert an object into array

Offset in array