Coding Cheatsheets - Learn to Code

Integrating Kafka with Node.js Apache Kafka is a popular open-source distributed event streaming platform that uses publish & subscribe mechanism to stream the records(data). Kafka Terminologies Distributed system: Distributed system is a computing environment where various software components located on different machines (over multiple locations). All components coordinate together to get stuff done as one unit.   Kafka Broker: Brokers are cluster of multiple servers. Message of each topic are split among the various brokers. Brokers handle all requests from clients to write and read events. A Kafka cluster is simply a collection of one or more Kafka brokers. Topics: A topic is a stream of "related" messages. Its unique throughout application. Kafka producers write messages to topics. Producer: Producer publishes data on the topics. A producer sends a message to a broker and the broker receives and stores messages. Consumers: Consumers read data from topics. A consu...

We can create own shortcode by using its predified hooks add_shortcode( 'hello-world', 'techsudhir_hello_world_shortcode' ); 1. Write the Shortcode Function Write a function with a unique name, which will execute the code you’d like the shortcode to trigger: function techsudhir_hello_world_shortcode() {    return 'Hello world!'; } Example: [hello-world] If we were to use this function normally, it would return Hello world! as a string 2. Shortcode function with parameters function techsudhir_hello_world_shortcode( $atts ) {    $a = shortcode_atts( array(       'name' => 'world'    ), $atts );    return 'Hello ' . $a['name'] . !'; } Example: [hello-world name="Sudhir"] You can also call shortcode function in PHP using do_shortcode function Example: do_shortcode('[hello-world]');

Here we will explain how to replace Urls with links from string Using PHP $string ='Rajiv Uttamchandani is an astrophysicist, human rights activist, and entrepreneur. Academy, a nonprofit organization dedicated to providing a robust technology-centered education program for refugee and displaced youth around the world.  CNN Interview - https://www.youtube.com/watch?v=EtTwGke6Jtg   CNN Interview - https://www.youtube.com/watch?v=g7pRTAppsCc&feature=youtu.be'; $string = preg_replace('@(https?://([-\w\.]+)+(:\d+)?(/([\w/_\.%-=#]*(\?\S+)?)?)?)@', '<a href="$1">$1</a>', $string); Using Javascript <script> function linkify(inputText) {     var replacedText, replacePattern1, replacePattern2, replacePattern3;     //URLs starting with http://, https://, or ftp://     replacePattern1 = /(\b(https?|ftp):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/gim;     replacedText = inputT...

Handling timezone conversion with PHP DateTime Create function function convert_to_server_datetime($date, $userTimeZone = 'America/Los_Angeles', $serverTimeZone = 'UTC') {     try {         $dateTime = new DateTime ($date, new DateTimeZone($userTimeZone));         $dateTime->setTimezone(new DateTimeZone($serverTimeZone));         return $dateTime->format("Y-m-d H:i:s");     } catch (Exception $e) {         return '';     } } Example: $userDate = '2019-04-19 13:20:00'; echo  convert_to_server_datetime ($userDate); Other Method public function convert($clienttimezone = null, $servertimezone = null){ $clientz=timezone_open("$clienttimezone"); $serverdateTime=date_create("now",timezone_open("$servertimezone")); $offset1 = timezone_offset_get($clientz,$serverdateTime); $servertz=timezone_open("$servertimezone"); $clientdateTime=date_crea...

How to create jQuery fadeIn fadeOut Animation Html: <ul> <li class="client-testimonial"><img src="demo1.png"></li> <li class="client-testimonial"><img src="demo2.png"></li> <li class="client-testimonial"><img src="demo3.png"></li> <li class="client-testimonial"><img src="demo4.png"></li> </ul> jQuery: jQuery(document).ready(function(){ if(jQuery('.client-testimonial').length > 0){ var showImg = jQuery(".client-testimonial-img"); var quoteIndex = -1; function showFadeInFadeOut() { ++quoteIndex; showImg.eq(quoteIndex % showImg.length) .fadeIn(2000) .delay(2000) .fadeOut(2000, showFadeInFadeOut); } showFadeInFadeOut(); } });

Here are simple way to get custom image from URL $imgUrl = 'http://localhost/wptest/wp-content/themes/sydney/images/header.jpg';   global $wpdb; $attachment = $wpdb->get_col($wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE guid='%s';", $imgUrl )); $image_id = $attachment[0]; $thumbnail_url = wp_get_attachment_image_src($image_id, array('615','440'), true );

How to set varchar primary key field in Mysql Table structure of Users table CREATE TABLE `users` (    `id` varchar(36) NOT NULL DEFAULT 'InitiallyEmpty',    `first_name` varchar(100) NOT NULL,    `last_name` varchar(100) NULL,    `email` varchar(100) NOT NULL,    `password` varchar(100) NOT NULL,    PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 Want to fill id an automatically filled. You need to create trigger Trigger structure for automatically update DROP trigger if exists before_insert_users; delimiter $$ CREATE TRIGGER before_insert_users BEFORE INSERT ON users FOR EACH ROW BEGIN     SET new.id = uuid(); END $$ delimiter ; Now create insert query insert into users (first_name,last_name,email,password) values ('Sudhir','Pandey','psudhir20@gmail.com','123465');