php kodas, tikrinantis įmonės registracijos numerį

function validateCompanyRegistrationNumber($number) { if (strlen($number) != 9) { return false; } $weights = [1, 2, 3, 4, 5, 6, 7, 8]; $sum = 0; for ($i = 0; $i < 8; $i++) { $sum += $weights[$i] * (int) $number[$i]; } $checkDigit = $sum % 11; if ($checkDigit == 10) { $checkDigit = 0; } return $checkDigit == (int) $number[8]; } $number = "123456789"; if (validateCompanyRegistrationNumber($number)) { echo "$number is valid."; } else { echo "$number is not valid."; 

} 

php and web sockets

 http://socketo.me/  igalina paleisti php serveri klausanti kakzoki tai porta, kad galetume apdoroti websocket susijungimus, uzklausas

php-fpm derinimai

php-fpm turi atskirus failus per user:  /etc/php.d  ten reikai nustatyti server limitus
https://tideways.com/profiler/blog/an-introduction-to-php-fpm-tuning

php session lock

php session  keep locked file until script ends or you call session_write_close();
https://jennifersoft.com/en/blog/tech/2019-04-08/
https://stackoverflow.com/questions/13946033/is-it-recommended-to-store-php-sessions-in-memcache

php optimizavimas su opcache

https://stackoverflow.com/questions/17224798/how-to-use-php-opcache

Detecting the HTTP method

$method = $_SERVER['REQUEST_METHOD']
if ($method == 'POST') {
    // Method is POST
} elseif ($method == 'GET') {
    // Method is GET
} elseif ($method == 'PUT') {
    // Method is PUT
} elseif ($method == 'DELETE') {
    // Method is DELETE
} else {
    // Method unknown
}

Way to use PUT data from PHP:
$method = $_SERVER['REQUEST_METHOD'];
if ('PUT' === $method) {
    parse_str(file_get_contents('php://input'), $_PUT);
    var_dump($_PUT); //$_PUT contains put fields 
}

php call url without wait

https://segment.com/blog/how-to-make-async-requests-in-php/

how to push android notifications

https://gist.github.com/prime31/5675017

UUID

mysql uuid() arba PHP https://gist.github.com/dahnielson/508447/b271e314c3c3190b0e31bc7f2f4f35da3c04f91c

Version 1 (date-time and MAC address)
Version 2 (date-time and MAC Address, DCE security version)
Versions 3 and 5 (namespace name-based)
Version 4 (random)

PHP kodo cache precompiled - APC

APC caches the complied PHP code so for next time, time for compiling PHP will be reduce and gives faster performance.

https://anandarajpandey.com/2014/07/15/how-to-install-apc-in-centos-for-php-better-performance-opcode/
https://www.mervcodes.com/install-apc-alternative-php-cache-in-centos-567-and-fedora-2021/

facebook sdk

SDK

https://developers.facebook.com/docs/javascript/quickstart/v2.5
https://developers.facebook.com/docs/javascript/examples
https://developers.facebook.com/docs/javascript/howto/jquery/v2.5

Post on user wall
http://stackoverflow.com/questions/2724977/using-facebook-graph-to-simply-post-a-wall-message-with-just-javascript
http://stackoverflow.com/questions/13810257/post-on-facebook-wall-with-javascript-sdk
https://gist.github.com/findjonmos/5777900

Get user profile data
http://stackoverflow.com/questions/5846752/getting-an-facebook-user-profile-data-with-javascript

PHP slugify url

static public function slugify($text)
{
  // replace non letter or digits by -
  $text = preg_replace('~[^\pL\d]+~u', '-', $text);

  // transliterate
  $text = iconv('utf-8', 'us-ascii//TRANSLIT', $text);

  // remove unwanted characters
  $text = preg_replace('~[^-\w]+~', '', $text);

  // trim
  $text = trim($text, '-');

  // remove duplicate -
  $text = preg_replace('~-+~', '-', $text);

  // lowercase
  $text = strtolower($text);

  if (empty($text)) {
    return 'n-a';
  }

  return $text;
}

JS/CSS glaudinimas, apjungimas su php

https://github.com/farhadi/SmartOptimizer

php form security using CSRF, multiple form submission prevent

http://stackoverflow.com/questions/6287903/how-to-properly-add-csrf-token-using-php

PHP profiler

https://github.com/aterrien/forp-PHP-profiler

WebSockets tutorial

websockets - dvipusis bendravimas serverio su narsykle
http://www.binarytides.com/websockets-php-tutorial/
js biblioteka http://socket.io/   o serverside naudoti node.js


server-sent events - info uzklausimai kas kelias sekundes. Galima is serverio paduoti retry parametra po kiek laiko kita karta uzklausti info.
http://www.w3schools.com/html/html5_serversentevents.asp
Jau susijungus su serveriu, glaima padaryti, kad php skriptas tampa veikiantis be sustojimo su while, ir su obflush ispushina info narsyklei tada kada nori serveris: http://www.howopensource.com/2014/12/introduction-to-server-sent-events/

Long Polling Ajax - kai uzklausa nueina i sevreri, o srveris atsako tik tada, kai turi naujos info. Uzdedamas ilgas timeout. Gavus atsakyma, uzklausa vel kartojama is narsykles i serveri:
http://techoctave.com/c7/posts/60-simple-long-polling-example-with-javascript-and-jquery/

URL apdribimas iš turimo html

URL apdribimas iš turimo html
prepare_url($str, $len=0);

PDO Database Class

https://github.com/indieteq/PHP-MySQL-PDO-Database-Class/blob/master/README.md
PDO multi prepare (insert multiple rows with single query): https://www.daniweb.com/programming/web-development/code/495371/insert-multiple-records-with-pdo-prepared-statement

https://code.tutsplus.com/tutorials/php-database-access-are-you-doing-it-correctly--net-25338

php date interval

$dates = array_map(function($dt) { return $dt->format('Y-m');}, iterator_to_array(new DatePeriod(new DateTime(date('Y-m-01')), DateInterval::createFromDateString('-1 month'), 12)));

php facebook login

http://metah.ch/blog/2014/05/facebook-sdk-4-0-0-for-php-a-working-sample-to-get-started/