What is a client, Server, Internal Data Types, and Variables in PHP?
Php Introduction PHP is an open Source Server-side programming/ Scripting language that suited for web development and can be embedded into HTML. PHP stands for Hypertext Preprocessor But it’s original…
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What is Multidimensional array in PHP with Example?
Multidimensional Array is Arrays of Array means one arrays have multiple array. You can define as it have 2Dimensional ([][]), 3Dimensional ([][][]), 4Dimensional ([][][]), and etc. ex:- How to work:-…
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What is settings.gradle in Gradle?
A gradle build has three important files. build.gradle, gradle.properties and settings.gradle Gradle build lifecycle consist of three phases: initialization, configuration, and execution. settings.gradle get evaluated in the initialization phase. Gradle…
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What is Gradle DAG (Directed Acyclic Graph)?
What is DAG (Directed Acyclic Graph) In computer science and mathematics, a directed acyclic graph (DAG) is a graph that is directed and without cycles connecting the other edges. This…
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How can use Array Operators in PHP with Example?
Php union:- ($a+$b) = Work as union means if same value then replace left variable to right variable(for keys that exit both array) ex:- Php Equality:- Key value same but…
Read more »AJAX Crash Course
What is AJAX ? Asynchronous Javascript & XML Set of web technologies Send & receive data asynchronously Does not interfere with current web page JSON has replaced XML for the…
Read more »DevOps Training Online – Class Recordings – January 2020
Dear Participants, Here are the consolidated URLs of DevOps training videos/class recordings/tutorials AWS Video Tutorial – January 2020 – (PDF – Notes) Docker Video Tutorial – January 2020 Part –…
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Top Plagiarism Checker Tool For SEO in 2020.
Q1. What is Plagiarism Checker? Plagiarism Checker means Duplicate Content Finder. It a free online tool to scan duplicate content with accuracy in no time. It accurately detects copyright content…
Read more »Protection of CSRF in Laravel
What is CSRF? CSRF stands for Cross Site Request Forgery and it’s a web attack that forces a user to make unintended requests to a web application where they are previously authenticated. Implementation:- CSRF…
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What is difference between echo, print, and print_r in PHP with example?
Echo Statement:- The echo statement is used to output in display with or without parenthesis echo or echo() but no return value. Echo Statement faster than print Statement. ex:- Print…
Read more »Laravel 5.5 php artisan migrate error in Ubuntu: SQLSTATE[HY000] [2002] Connection refused
How I got this error?Ans: I was running php artisan migrate command in /opt/lampp/htdocs/project_dir What was the error? ubuntu@ip-ip_addr:/opt/lampp/htdocs/project_dir$ php artisan migrateIn Connection.php line 664: SQLSTATE[HY000] [2002] Connection refused (SQL:…
Read more »Ubuntu or Linux Error: Unable to access XAMPP MySQL from /opt/lampp/bin/mysql
Here’s the complete article on the solution with baby steps:How to link php from XAMPP installation to use php command from user or any other directory in Ubuntu or Linux
Read more »How to link MySQL from XAMPP (/opt/lampp/bin) to use mysql command from any directory in Ubuntu or Linux
Assumption: I assume that you have already installed XAMPP in your Ubuntu OR Linux machine.If not, then you may follow this link to do so: https://www.devopsschool.com/blog/installing-xampp-7-4-xxx-on-ubuntu/ and https://www.devopsschool.com/blog/how-to-link-php-from-xampp-installation-to-use-php-command-from-user-or-any-other-directory-in-ubuntu-or-linux/ NOTE: I also…
Read more »Ubuntu or Linux error: Error: EACCES: permission denied, mkdir ‘/opt/lampp/htdocs/node_modules/node-sass/vendor’
How I got this error:I got this error while running command: npm install in one of my project directory located at /opt/lamoo/htdocs What was the Error: root@ip-ip-address:/opt/lampp/htdocs/[projectName]# npm install ]…
Read more »How to install latest version of nodejs in Ubuntu or Linux
Steps:1. Login to Ubuntu or Linux machine using ssh client like putty 2. Run command: sudo -s3. Run command: sudo apt-get install curl4. Run command: curl -sL https://deb.nodesource.com/setup_12.x | sudo…
Read more »Linux Tutorials: How to setup SSH keys on Ubuntu/ Linux
Introduction:If you want to clone a repository from gitlab, github or bitbucket in your Ubuntu machine then you may need to setup SSH Keys in ubuntu and add that key…
Read more »How to install composer in Ubuntu or Linux machine
To install Composer on your Ubuntu or Linux system, perform the following steps: 1. Check if you have PHP installed and configured properly. If not then please follow this arcticle…
Read more »How to link php from XAMPP installation to use php command from user or any other directory in Ubuntu or Linux
Assumption:I assume that you have already installed XAMPP in your Ubuntu OR Linux machine.If not, then you may follow this link to do so: https://www.devopsschool.com/blog/installing-xampp-7-4-xxx-on-ubuntu/ How I got the error:After…
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What is the difference between numeric and associative array in loop with example?
For Loop with Numeric Array:- Numeric Array uses in For Loop for Declaration and Initialization as numeric index values are store and access. ex:- For Loop with Associative Array:- The…
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Protected: Digital Marketing Team Goals – 2020
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Read more »How to keep putty SSH connections alive
Introduction: This article describes how to keep SSH connections alive. If you experience problems when using SSH, such as dropped or unresponsive connections, you may need to adjust some settings…
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Top 50 Tools – Platform – Library – Scripting – Framework for Web Developer in 2020
Tools git sourcetree chrome-developer-tools firebug postman adobexd adobephotoshop Cloud aws github godaddy cpanel Framework android xmapp laravel Concept microservices Operating System ubuntu centos Programming Language php Web Server apache-http nginx…
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Python Interview Questions and Answer Part – 2
Which argument would you use in a Python function to obtain a dictionary of all the named arguments passed? Keyword Arguments (**kwargs) (Ans) *args The NoneType argument Regular function arguments…
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Python Interview Questions and Answer Part – 1
What Python function is used to open files? open_file() file() new_file() open() (Ans) What does the pass keyword do? Passes control to another function Continues to the next iteration of…
Read more »npm error on Linux: Node Sass could not find a binding for your current environment: Linux 64-bit with Node.js 12.x
Environment:Linux 64-bitLaravel 5.5Node.js 12.x How I got this error:I made some changes in one of the js file of my project. Hence, I needed to rebuild the JS part of…
Read more »Git Error: How do I remove files saying “old mode 100644 new mode 100755” from unstaged changes in Git?
How I got this error:I had to take a pull in my project directoryI tried to take the pull by running the below commandscd <My Project Directory>sudo git pull The…
Read more »PHP Laravel Error: Trying to access array offset on value of type null
Environment:Laravel Version: 5.5PHP Version: 7.4.0 Error stack trace:Message: Trying to access array offset on value of type null Sample code that gave me error:$filterConfig = $request->get(‘filterConfig’, null);$showAll = $filterConfig[‘show’][‘all’] ===…
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How many types of loops are there in PHP?
While Loop:-While loop keeps repeating an action until a condition returns false. Nested While loop:-Nested while loops work as while loop but in this case, you use one or more…
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Complete Reference: WordPress Debugging & Troubleshooting Guide
Any wordpress issues and problem may be caused by a variety of issues, including: Part – 1- Enable debugging mode in WordPress, follow the steps: Edit wp-config.php and add following…
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