Dev {Tricks}

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PHP User-Defined Functions

User-defined functions are functions created by the programmer. They’re defined using the function keyword. The functions are different from built in function, and reusable.

// user defined function

function sum() {
$num1=10;
$num2=20;
echo $num1+$num2;
}
sum(); // call the function

 

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PHP Built-in Functions

PHP Built-in functions are the standard functions that are always available in PHP without any special requirement like.

strlen(): To get the length of a string.
array_merge(): To merge two or more arrays.
is_numeric(): To check if a variable is a number or a numeric string.

Build In Functions List
https://www.php.net/manual/en/indexes.functions.php

<?php
// PHP Built in Function
print_r(“Hello”.“\n“);
echo (1+2).“\n“;
var_dump(“Hello World”);
echo“\n“;
$string=“OSTAD”;
$stringLen=strlen($string);
echo $stringLen.“\n“;
// Determine $value=”122″ is numeric or NOT numeric.
$value = 122;
if (is_numeric($value)) {
    echo “The value $value is numeric”;
}
else {
    echo “The value $value is NOT numeric”;
}
echo “\n“;

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Mastering Git and GitHub

Git & GitHub

Git Setup and Configuration

Git Initialization

 

Why do we need git?

  • Version control (Git, GitLab, Beanstalk, PerForce, Bitbucket)
  • By git we clone repository and push changes
  • Change tracking
  • Collaborate on project

Why do we need github?

  • Remote folder/repository is hosted on GitHub
  • Local clone of repository
  • It is owned by Microsoft

Difference between Git & GitHub

Git GitHub
1. Tool/Software 1. Service
2. Change control, Version control 2. Host git repository
3. Provides CLI (Command Line Interface Tool) 3. Provides GUI (Graphical User Interface)
4. Installed and maintained locally 4. Maintained on cloud/web

Git setup and configuration

  • Search “git scm” and download it. 
    https://git-scm.com/downloads
  • Now install it
  • Open Git Bash and check git version. 
    git --version
  • To set your Git username and email, type this in your terminal 
    git config --global user.name Shahadat Hossain
git config --global user.name
git config --global user.email bdhostit@gmail.com
git config --global user.email
  • Now open terminal of VS Code and launch profile “Git Bash”.

 

 

 

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TROUBLE with deleting windows files. Permission Error.

Two ways to solve the problem

  • Command Prompt
  • File Explorer

Command Prompt

  • Run Command Prompt as Administrator
  • Enter TAKEOWN /F and then type the file or folder name. 
    TAKEOWN /F C:\Windows\System32\TestFolder\deleteFile.dill
  • Press Enter to take control of the file.
  • Enter the following command to immediately give your user account permission to delete or change the file or folder: 
    icacls C:\Windows\System32\TestFolder\deleteFile.dill /grant Administrators:F /T
  • Edit the File’s Security Options to Fix the TrustedInstaller Error

File Explorer

If you are not comfortable with Command Prompt try with File Explorer.

  • Right-click on the file or the folder you want to delete and then choose Properties.
  • Now go to the Security tab.
  • Select a Group or user name and check permissions. You can select Administrators or Users.
  • You have to make the permission Full control. To change permission
    • First change Ownership
      • To change ownership, click on the Advanced button. Then click on the blue color Change link. From the popup box, click on Advanced… and then find and select a user. Check Replace owner on subcontainers and objects and Replace all child object permission entries with inheritable permission entries from the object and click on OK.
    • Then edit permission
      • To change permission, click on Edit
    • Now change permission to Full control
    • Click OK.
  • Now you can delete the file or the folder.