Anywhere, I manage to overcome this issue and just want to share what I found during the optimization. There is trick you can use to optimize your query with GROUP BY statement.

We start with normal query as below. Both query do the same objective. I just want to see if there any performance impact when I use MONTH and YEAR function in WHERE clause compared to BETWEEN … AND … for the DATETIME selection.

SELECT link_id,COUNT(*) FROM ltlinks_log WHERE MONTH(datalog) = '3' AND YEAR(datalog) = '2012' GROUP BY link_id;
/* 0 rows affected, 233 rows found. Duration for 1 query: 173.062 sec. */

SELECT link_id,COUNT(*) FROM ltlinks_log WHERE datalog BETWEEN '2012-03-01 00:00:00' AND '2012-04-01 00:00:00' GROUP BY link_id;
/* 0 rows affected, 233 rows found. Duration for 1 query: 174.328 sec. */

From the result above, there is no big deal with the both method.

We continue with the test.

SELECT link_id,COUNT(*) FROM ltlinks_log WHERE MONTH(datalog) = '3' AND YEAR(datalog) = '2012' GROUP BY crc32(link_id);
/* 0 rows affected, 233 rows found. Duration for 1 query: 4.859 sec. */

SELECT link_id,COUNT(*) FROM ltlinks_log WHERE datalog BETWEEN '2012-03-01 00:00:00' AND '2012-04-01 00:00:00' GROUP BY crc32(link_id);
/* 0 rows affected, 233 rows found. Duration for 1 query: 4.829 sec. */

There is huge improvement when I convert link_id to 32-bit unsigned value when do GROUP BY. The test not end here, I change my link_id field type from INT to UNSIGNED INT and test to see is there any different. Below is the test result.

SELECT link_id,COUNT(*) FROM ltlinks_log WHERE MONTH(datalog) = '3' AND YEAR(datalog) = '2012' GROUP BY link_id;
/* 0 rows affected, 233 rows found. Duration for 1 query: 174.312 sec. */

SELECT link_id,COUNT(*) FROM ltlinks_log WHERE datalog BETWEEN '2012-03-01 00:00:00' AND '2012-04-01 00:00:00' GROUP BY link_id;
/* 0 rows affected, 233 rows found. Duration for 1 query: 173.172 sec. */

SELECT link_id,COUNT(*) FROM ltlinks_log WHERE MONTH(datalog) = '3' AND YEAR(datalog) = '2012' GROUP BY crc32(link_id);
/* 0 rows affected, 233 rows found. Duration for 1 query: 4.765 sec. */

SELECT link_id,COUNT(*) FROM ltlinks_log WHERE datalog BETWEEN '2012-03-01 00:00:00' AND '2012-04-01 00:00:00' GROUP BY crc32(link_id);
/* 0 rows affected, 233 rows found. Duration for 1 query: 4.625 sec. */

huh? there is not much different after changing field type from INT to UNSIGNED INT ?.

so the conclusion here, converting GROUP BY to 32-bit unsigned does affect query performance.

    function objectToArray($d) {
        if (is_object($d)) {
            // Gets the properties of the given object
            // with get_object_vars function
            $d = get_object_vars($d);
        }

        if (is_array($d)) {
            /*
            * Return array converted to object
            * Using __FUNCTION__ (Magic constant)
            * for recursive call
            */
            return array_map(__FUNCTION__, $d);
        }else {
            // Return array
            return $d;
        }
    }
 

and this function to convert Array to stdClass

    function arrayToObject($d) {
        if (is_array($d)) {
	    /*
            * Return array converted to object
            * Using __FUNCTION__ (Magic constant)
            * for recursive call
            */
            return (object) array_map(__FUNCTION__, $d);
        } else {
            // Return object
            return $d;
        }
    }

Source : http://www.if-not-true-then-false.com/

From ibnuyahya.com

Contoh hasil
http://esolat-ibnuyahya.rhcloud.com/
http://api.ibnuyahya.com/esolat/

Korang boleh fork, clone atau buat la apa2 pun esolat class ini di
https://github.com/hanafiah/esolat

Cuma satu je. sudi2 kan lah linkback ke site ni ye. bukan apa, biar developer lain pun boleh manfaatkan class ni. kalau tak sudi pun takpa. Janji korang gunakan/get the idea dari kod ni. peace no war

setakat ni class ni akan return data dalam bentuk array saja.

contoh penggunaan

paparkan jadual waktu solat untuk satu tahun

    include 'esolat.php';

    $code   = 'jhr02';
    $esolat = new Esolat($code);
    $result = $esolat->getYear();

    print_r($result);

dapatkan senarai kod kawasan disini http://www.e-solat.gov.my/e-solat.php

paparkan jadual waktu solat untuk satu tahun

    include 'esolat.php';

    $code   = 'jhr02';
    $month  = 1; // for january

    $esolat = new Esolat($code);
    $result = $esolat->getMonth($month);

    print_r($result);

paparkan jadual waktu solat untuk satu hari

    include 'esolat.php';

    $code   = 'jhr02';
    $day    = 3; // for 3rd
    $month  = 1; // for january

    $esolat = new Esolat($code);
    $result = $esolat->getDay($day,$month);

    print_r($result);

codeigniter malaysia

CodeIgniter is a powerful PHP framework with a very small footprint, built for PHP coders who need a simple and elegant toolkit to create full-featured web applications. If you’re a developer who lives in the real world of shared hosting accounts and clients with deadlines, and if you’re tired of ponderously large and thoroughly undocumented frameworks

Lalalala : codeigniter , malaysia, fuelphp, CI, oil, reactor

fuelphp malaysia

FuelPHP is a simple, flexible, community driven PHP 5.3 web framework based on the best ideas of other frameworks with a fresh start

fuelphp, CI, oil, reactor, codeigniter , malaysia

Melihat senarai tags

untuk melihat senarai tags sedia ada, anda perlu jalankan arahan dibawah

$ git tag

git akan memberikan output sebagaimana berikut, jika anda mempunyai tags sebelum ini.

$ git tag
v1.0

Menambah/membuat tags

membuat tags baru agak mudah. hanya menggunakan arahan git tag dengan parameter -a . anda boleh juga masukkan komen/mesej dengan penambahan parameter -m

$ git tag -a v1.01 -m 'version 1.01 - update minor bug'

semak balik tagging

$ git tag
v1.0
v1.01

Hapuskan/delete tags

Bagi arahan delete tags, anda perlu gunakan parameter -d sebagai arahan delete di ikuti dengan nama tags yang ingin di delete.

$ git tag -d v1.01
Deleted tag 'v1.01' (was 152fesa)

semak balik tagging

$ git tag
v1.0

tags commits yang lepas

Katakan anda terlupa buat tags pada commits yang lepas-lepas. Jangan bimbang, anda boleh tags commit berikut dengan menyatakan commits id selepas arahan -a

dapatkan commits id yang ingin di tags

$ git log --pretty=oneline
d46214131a8597da9d5043469c1d058bbda72e41 correcting css
b3ef71472de70f6ed9b1bb6958f53b3865b54516 correct indention
04a03f3c9c412f393d7c7b462a77c742b859be3d change IPN model

ok sebagai contoh, saya ingin tags last commit saya iaitu

d46214131a8597da9d5043469c1d058bbda72e41 correcting css

Apa yang saya perlu lakukan adalah dengan menjalankan arahan seperti dibawah ini. Jika commit id terlalu panjang untuk di taip, anda hanya perlu taip 6 character pertama sahaja ( contoh yang di bold-kan).

$ git tag -a v1.2 d46214

semak balik tagging

$ git tag
v1.0
v1.2

Sharing tags

Secara default, git tidak akan bawa tags sewaktu anda push ke server. Jadi anda perlu jalankan arahan di bawah untuk memastikan tags yang telah di buat akan di update ke server.

$ git push --tags

class Example {

    private static $instance = array();
    private $count = 0;

    private function __construct() {

    }

    public static function multiton($name) {
        if (!isset(self::$instance[$name])) {
            echo 'Creating new instance.', '
';
            $className = __CLASS__;
            self::$instance[$name] = new $className;
        }
        return self::$instance[$name];
    }

    public function increment() {
        return $this->count++;
    }

    public function __clone() {
        trigger_error('Clone is not allowed.', E_USER_ERROR);
    }

    public function __wakeup() {
        trigger_error('Unserializing is not allowed.', E_USER_ERROR);
    }

}

//test
$multiton = Example::multiton('test1'); // prints "Creating new instance."
echo $multiton->increment(), '
'; // 0
echo $multiton->increment(), '
'; // 1

$multiton1 = Example::multiton('test2'); // prints "Creating new instance."
echo $multiton1->increment(), '
'; // 0
echo $multiton1->increment(), '
'; // 1

echo $multiton->increment(), '
'; // 2
echo $multiton->increment(), '
'; // 3

$multiton2 = Example::multiton('test2'); // reuse existing instance
echo $multiton1->increment(), '
'; // 2
echo $multiton1->increment(), '
'; // 3
// all of these will raise a Fatal Error
$multiton2 = new Example;
$multiton3 = clone $multiton;
$multiton4 = unserialize(serialize($multiton));

class Example {

    private static $instance;
    private $count = 0;

    private function __construct() {
    }

    public static function singleton() {
        if (!isset(self::$instance)) {
            echo 'Creating new instance.', '
';
            $className = __CLASS__;
            self::$instance = new $className;
        }
        return self::$instance;
    }

    public function increment() {
        return $this->count++;
    }

    public function __clone() {
        trigger_error('Clone is not allowed.', E_USER_ERROR);
    }

    public function __wakeup() {
        trigger_error('Unserializing is not allowed.', E_USER_ERROR);
    }

}

//test
$singleton = Example::singleton(); // prints "Creating new instance."
echo $singleton->increment(), '
'; // 0
echo $singleton->increment(), '
'; // 1

$singleton1 = Example::singleton(); // reuses existing instance now
echo $singleton1->increment(), '
'; // 2
echo $singleton1->increment(), '
'; // 3
//
echo $singleton->increment(), '
'; // 4
// all of these will raise a Fatal Error
$singleton2 = new Example;
$singleton3 = clone $singleton;
$singleton4 = unserialize(serialize($singleton));

reference : http://php.net/manual/en/language.oop5.patterns.php

1. Ringkasan Konsep MVC
2. Struktur asas aplikasi CakePHP.
3. Membina borang pendaftaran serta asas aplikasi (CRUD)
4. Menggunakan komponen cakephp (Auth) untuk mengawal akses kepada sistem.

Aku galakkan student-student ambil peluang untuk belajar tentang MVC dan CakePHP , lebih-lebih lagi training ni di adakan secara percuma. Cuma malangnya, hanya +-3 orang pelajar dari UKM yang mengambil peluang untuk belajar CakePHP.. syabas inspector sahab untuk korang yang hadir .

Jika korang hadir ke kursus ini pada masa akan datang dan menggunakan nginx atau MNPP sebagai web server, mungkin configuration berikut sedikit sebanyak dapat membantu menyelesaikan masalah rewrite.

server {
    listen       80;
    server_name  cake.local;
    root   /Users/Ibnuyahya/Projects/cakephp1.3/app/webroot;

    error_log /Applications/MNPP/logs/nginx/error.cake1.3.log;
    access_log /Applications/MNPP/logs/nginx/access.cake1.3.log;    

    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   html;
    }

    location = /favicon.ico {
	access_log off;
	log_not_found off;
    }

    location / {
	index index.html index.php;
        if (-f $request_filename) {
            break;
        }
        #this part important for cakePHP rewrite
        rewrite ^(.+)$ /index.php?url=$1 last;
    }

    location ~ \.php$ {
     	fastcgi_pass 127.0.0.1:9000;
        fastcgi_index index.php;
        include /Applications/MNPP/conf/nginx/fastcgi_params;
    }
}

From ibnuyahya.com

get more information about mnpp here http://getmnpp.org/