Crud Operation in Laravel

In this tutorial I’m going to learn how to create Crud operation in Laravel. Please follow some easy steps define below.

Step 1 — Installing Laravel 8

Open terminal in xampp/htdocs and paste below code

composer create-project laravel/laravel example-app

Step 2 — Setting up a MySQL Database

👇 Step 2 — Database Configuration

Setup database with your installed laravel 8 project . lets go to .env folder and put database name and connect to database.

👇 Next go to .env folder and put database name

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=crud-operation
DB_USERNAME=root
DB_PASSWORD=

Next run this command

php artisan migrate

Step 3 — Creating a Database Migration

Run this command

php artisan make:migration create_products_table --create=products

Copy below code and simply paste in your products table

<?php

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateProductsTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('products', function (Blueprint $table) {
$table->increments('id');
$table->string('name');
$table->text('detail');
$table->timestamps();
});
}

/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::dropIfExists('products');
}
}

Step 4 — Adding a Resource Route

<?php

use Illuminate\Support\Facades\Route;

/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/

Route::get('/', function () {
return view('welcome');
});

Route::resource('products','ProductController');

Step 5 — Adding a Laravel 8 Controller and Model

run this command

php artisan make:controller ProductController --resource --model=Product

Go to your product controller and paste below code

<?php

namespace App\Http\Controllers;

use App\Product;
use Illuminate\Http\Request;

class ProductController extends Controller
{
/**
* Display a listing of the resource.
*
* @return \Illuminate\Http\Response
*/
public function index()
{
$products = Product::latest()->paginate(5);

return view('products.index',compact('products'))
->with('i', (request()->input('page', 1) - 1) * 5);
}

/**
* Show the form for creating a new resource.
*
* @return \Illuminate\Http\Response
*/
public function create()
{
return view('products.create');
}

/**
* Store a newly created resource in storage.
*
* @param \Illuminate\Http\Request $request
* @return \Illuminate\Http\Response
*/
public function store(Request $request)
{
$request->validate([
'name' => 'required',
'detail' => 'required',
]);

Product::create($request->all());

return redirect()->route('products.index')
->with('success','Product created successfully.');
}

/**
* Display the specified resource.
*
* @param \App\Product $product
* @return \Illuminate\Http\Response
*/
public function show(Product $product)
{
return view('products.show',compact('product'));
}

/**
* Show the form for editing the specified resource.
*
* @param \App\Product $product
* @return \Illuminate\Http\Response
*/
public function edit(Product $product)
{
return view('products.edit',compact('product'));
}

/**
* Update the specified resource in storage.
*
* @param \Illuminate\Http\Request $request
* @param \App\Product $product
* @return \Illuminate\Http\Response
*/
public function update(Request $request, Product $product)
{
$request->validate([
'name' => 'required',
'detail' => 'required',
]);

$product->update($request->all());

return redirect()->route('products.index')
->with('success','Product updated successfully');
}

/**
* Remove the specified resource from storage.
*
* @param \App\Product $product
* @return \Illuminate\Http\Response
*/
public function destroy(Product $product)
{
$product->delete();

return redirect()->route('products.index')
->with('success','Product deleted successfully');
}
}

Lets Go to Model and paste below code

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Product extends Model
{
protected $fillable = [
'name', 'detail'
];
}

Step 6 — Adding your Larevl 8 Blade Views

Go to Resource folder and create view file

1) layout.blade.php

2) index.blade.php

3) create.blade.php

4) edit.blade.php

5) show.blade.php

resources/views/products/layout.blade.php

<!DOCTYPE html>
<html>
<head>
<title>Laravel 6 CRUD Application - Laravel Amit</title>
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-alpha/css/bootstrap.css" rel="stylesheet">
</head>
<body>

<div class="container">
@yield('content')
</div>

</body>
</html>

resources/views/products/index.blade.php

@extends('products.layout')

@section('content')
<div class="row">
<div class="col-lg-12 margin-tb">
<div class="pull-left">
<h2>Laravel 6 CRUD Example from By Laravel Amit</h2>
</div>
<div class="pull-right">
<a class="btn btn-success" href="{{ route('products.create') }}"> Create New Product</a>
</div>
</div>
</div>

@if ($message = Session::get('success'))
<div class="alert alert-success">
<p>{{ $message }}</p>
</div>
@endif

<table class="table table-bordered">
<tr>
<th>No</th>
<th>Name</th>
<th>Details</th>
<th width="280px">Action</th>
</tr>
@foreach ($products as $product)
<tr>
<td>{{ ++$i }}</td>
<td>{{ $product->name }}</td>
<td>{{ $product->detail }}</td>
<td>
<form action="{{ route('products.destroy',$product->id) }}" method="POST">

<a class="btn btn-info" href="{{ route('products.show',$product->id) }}">Show</a>

<a class="btn btn-primary" href="{{ route('products.edit',$product->id) }}">Edit</a>

@csrf
@method('DELETE')

<button type="submit" class="btn btn-danger">Delete</button>
</form>
</td>
</tr>
@endforeach
</table>

{!! $products->links() !!}

@endsection

👇 resources/views/products/create.blade.php

@extends('products.layout')

@section('content')
<div class="row">
<div class="col-lg-12 margin-tb">
<div class="pull-left">
<h2>Add New Product</h2>
</div>
<div class="pull-right">
<a class="btn btn-primary" href="{{ route('products.index') }}"> Back</a>
</div>
</div>
</div>

@if ($errors->any())
<div class="alert alert-danger">
<strong>Whoops!</strong> There were some problems with your input.<br><br>
<ul>
@foreach ($errors->all() as $error)
<li>{{ $error }}</li>
@endforeach
</ul>
</div>
@endif

<form action="{{ route('products.store') }}" method="POST">
@csrf

<div class="row">
<div class="col-xs-12 col-sm-12 col-md-12">
<div class="form-group">
<strong>Name:</strong>
<input type="text" name="name" class="form-control" placeholder="Name">
</div>
</div>
<div class="col-xs-12 col-sm-12 col-md-12">
<div class="form-group">
<strong>Detail:</strong>
<textarea class="form-control" style="height:150px" name="detail" placeholder="Detail"></textarea>
</div>
</div>
<div class="col-xs-12 col-sm-12 col-md-12 text-center">
<button type="submit" class="btn btn-primary">Submit</button>
</div>
</div>

</form>
@endsection

resources/views/products/edit.blade.php

@extends('products.layout')

@section('content')
<div class="row">
<div class="col-lg-12 margin-tb">
<div class="pull-left">
<h2>Edit Product</h2>
</div>
<div class="pull-right">
<a class="btn btn-primary" href="{{ route('products.index') }}"> Back</a>
</div>
</div>
</div>

@if ($errors->any())
<div class="alert alert-danger">
<strong>Whoops!</strong> There were some problems with your input.<br><br>
<ul>
@foreach ($errors->all() as $error)
<li>{{ $error }}</li>
@endforeach
</ul>
</div>
@endif

<form action="{{ route('products.update',$product->id) }}" method="POST">
@csrf
@method('PUT')

<div class="row">
<div class="col-xs-12 col-sm-12 col-md-12">
<div class="form-group">
<strong>Name:</strong>
<input type="text" name="name" value="{{ $product->name }}" class="form-control" placeholder="Name">
</div>
</div>
<div class="col-xs-12 col-sm-12 col-md-12">
<div class="form-group">
<strong>Detail:</strong>
<textarea class="form-control" style="height:150px" name="detail" placeholder="Detail">{{ $product->detail }}</textarea>
</div>
</div>
<div class="col-xs-12 col-sm-12 col-md-12 text-center">
<button type="submit" class="btn btn-primary">Submit</button>
</div>
</div>

</form>
@endsection

resources/views/products/show.blade.php

@extends('products.layout')
@section('content')
<div class="row">
<div class="col-lg-12 margin-tb">
<div class="pull-left">
<h2> Show Product</h2>
</div>
<div class="pull-right">
<a class="btn btn-primary" href="{{ route('products.index') }}"> Back</a>
</div>
</div>
</div>

<div class="row">
<div class="col-xs-12 col-sm-12 col-md-12">
<div class="form-group">
<strong>Name:</strong>
{{ $product->name }}
</div>
</div>
<div class="col-xs-12 col-sm-12 col-md-12">
<div class="form-group">
<strong>Details:</strong>
{{ $product->detail }}
</div>
</div>
</div>
@endsection

Lets run php artisan serve

http://localhost:8000/products

I hope its helpful for you.

Tagged : / / /

How to set read more button using data from database in Laravel?

Hi friends, I want to add read more… button in my blade file where data is coming from database.

below is my code in blade file getalldata.blade.php

<ul class="text-justify">
	<li>
        <small>{{$users->pro_experience}}</small>
    </li>
</ul>

In above Unordered list I am getting a long data from database and I want to add a Read more and Read Less toggle option. Now follow below steps to get your result now.

getalldata.blade.php

<ul class="text-justify">
	<li class="">
		<!-- <small>{{$users->pro_experience}}</small> -->
		@if(strlen($users->pro_experience) > 50)
			{{substr($users->pro_experience,0,50)}}
			<span class="read-more-show hide_content">More<i class="fa fa-angle-down"></i></span>
			<span class="read-more-content"> {{substr($users->pro_experience,50,strlen($users->pro_experience))}} 
			<span class="read-more-hide hide_content">Less <i class="fa fa-angle-up"></i></span> </span>
		@else
			{{$users->pro_experience}}
		@endif
	</li>
</ul>

Javascript Code

<script type="text/javascript">
// Hide the extra content initially:
            $('.read-more-content').addClass('hide_content')
            $('.read-more-show, .read-more-hide').removeClass('hide_content')

            // Set up the toggle effect:
            $('.read-more-show').on('click', function(e) {
              $(this).next('.read-more-content').removeClass('hide_content');
              $(this).addClass('hide_content');
              e.preventDefault();
            });
            $('.read-more-hide').on('click', function(e) {
              var p = $(this).parent('.read-more-content');
              p.addClass('hide_content');
              p.prev('.read-more-show').removeClass('hide_content'); // Hide only the preceding "Read More"
              e.preventDefault();
            });
</script>

CSS Code

<style type="text/css">
    .read-more-show{
      cursor:pointer;
      color: #ed8323;
    }
    .read-more-hide{
      cursor:pointer;
      color: #ed8323;
    }

    .hide_content{
      display: none;
    }
</style>

Resources :

  1. Click Here
  2. Click Here
Tagged : / / / / /

php version (7.2.34) does not satisfy that requirement.

When i download the Laravel project from Github and setup project i run composer update its showing this types of error

Problem 1
- Root composer.json requires php ^7.3|^8.0 but your php version (7.2.34) does not satisfy that requirement.
Problem 2
- phpro/grumphp[v1.0.0, ..., v1.1.0] require php ^7.3 -> your php version (7.2.34) does not satisfy that requirement.
- phpro/grumphp[v1.2.0, ..., v1.3.1] require php ^7.3 || ^8.0 -> your php version (7.2.34) does not satisfy that requirement.
- Root composer.json requires phpro/grumphp ^1.0 -> satisfiable by phpro/grumphp[v1.0.0, ..., v1.3.1].

Let open editor and run below

composer install --ignore-platform-reqs

Thanks

Tagged : / / /

How to Add Data in DataTable in Laravel Crud

In this tutorial I’m going to describe how to add data in DataTable in laravel 8 we will create single page companies ajax crud application (SPA) using dataTables js, modal and jQuery in laravel 8.

Laravel 8 Ajax CRUD Tutorial using Datatable JS
Step 1 – Download Laravel 8 App
Step 2 – Database Configuration
Step 3 – Installing Yajra Datatables
Step 4 – Make Model & Migration
Step 5 – Make Routes
Step 6 – Create AJAX CRUD Datatables Controller
Step 7 – Create Blade Views File
companies.blade.php
company-action.blade.php
Step 8 – Run Development Server

Step 1 — Download Laravel 8 App

1st step Install laravel project and new setup, lets open the terminal C:\xampp\htdocs and paste below code

composer create-project --prefer-dist laravel/laravel laraveldatatable

Step 2 — Database Configuration

Setup database with your installed laravel 8 project . lets go to .env folder and put database name and connect to database.

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=laraveldatatable
DB_USERNAME=root
DB_PASSWORD=

Next run this command

php artisan migrate

Step 3 — Installing Yajra Datatables

composer require yajra/laravel-datatables-oracle

Then configure datatables package. So go to config directory and open app.php file. And add the following service providers into app.php file:

Go to -> config/app.php and put in providers section

'providers' => [

Yajra\Datatables\DatatablesServiceProvider::class,
],

'aliases' => [

'Datatables' => Yajra\Datatables\Facades\Datatables::class,
]

Then publish laravel datatables vendor package by using below command:

php artisan vendor:publish

Step 4 — Make Model & Migration

php artisan make:model Company -m

Simply copy this code and paste in companies model

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreateCompaniesTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('companies', function (Blueprint $table) {
$table->id();
$table->timestamps();
$table->string('name');
$table->string('email');
$table->string('address');
});
}

/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::dropIfExists('companies');
}
}

Lets migrate table to database run this command

php artisan migrate

After that, lets go to app/models directory and open company.php model file. Then add the following code into it:

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Company extends Model
{

protected $fillable =['name', 'email', 'address'];

}

Step 5 — Make Routes

<?php

use Illuminate\Support\Facades\Route;

/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/

Route::get('/', function () {
return view('welcome');
});

use App\Http\Controllers\DataTableAjaxCRUDController;

Route::get('ajax-crud-datatable', [DataTableAjaxCRUDController::class, 'index']);
Route::post('store-company', [DataTableAjaxCRUDController::class, 'store']);
Route::post('edit-company', [DataTableAjaxCRUDController::class, 'edit']);
Route::post('delete-company', [DataTableAjaxCRUDController::class, 'destroy']);

Step 6 — Create AJAX CRUD Datatables Controller

php artisan make:controller DataTableAjaxCRUDController -r

Lets go to controller and copy below code and paste there

<?php

namespace App\Http\Controllers;


use Illuminate\Http\Request;
use App\Company;
class DataTableAjaxCRUDController extends Controller
{
/**
* Display a listing of the resource.
*
* @return \Illuminate\Http\Response
*/
public function index()
{
if(request()->ajax()) {
return datatables()->of(Company::select('*'))
->addColumn('action', 'company-action')
->rawColumns(['action'])
->addIndexColumn()
->make(true);
}
return view('companies');
}

/**
* Show the form for creating a new resource.
*
* @return \Illuminate\Http\Response
*/
public function create()
{
//
}

/**
* Store a newly created resource in storage.
*
* @param \Illuminate\Http\Request $request
* @return \Illuminate\Http\Response
*/
public function store(Request $request)
{
$companyId = $request->id;

$company = Company::updateOrCreate(
[
'id' => $companyId
],
[
'name' => $request->name,
'email' => $request->email,
'address' => $request->address
]);

return Response()->json($company);
}

/**
* Display the specified resource.
*
* @param int $id
* @return \Illuminate\Http\Response
*/
public function show($id)
{
//
}

/**
* Show the form for editing the specified resource.
*
* @param int $id
* @return \Illuminate\Http\Response
*/
public function edit($id)
{
$where = array('id' => $request->id);
$company = Company::where($where)->first();

return Response()->json($company);
}

/**
* Update the specified resource in storage.
*
* @param \Illuminate\Http\Request $request
* @param int $id
* @return \Illuminate\Http\Response
*/
public function update(Request $request, $id)
{
//
}

/**
* Remove the specified resource from storage.
*
* @param int $id
* @return \Illuminate\Http\Response
*/
public function destroy($id)
{
$company = Company::where('id','$request->id')->delete();
return Response()->json($company);
}
}

Step 6 — Create Blade Views File

Create two blade views file, which is following:

  • companies.blade.php

Next go to companies.blade.php file and paste below code

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Laravel 8 AJAX CRUD using DataTable js Tutorial From Scratch - Tutsmake.com</title>
<meta name="csrf-token" content="{{ csrf_token() }}">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css" >
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
<link href="https://cdn.datatables.net/1.10.21/css/jquery.dataTables.min.css" rel="stylesheet">
<script src="https://cdn.datatables.net/1.10.21/js/jquery.dataTables.min.js"></script>
</head>
<body>
<div class="container mt-2">
<div class="row">
<div class="col-lg-12 margin-tb">
<div class="pull-left">
<h2>Laravel 8 Ajax CRUD DataTables Tutorial</h2>
</div>
<div class="pull-right mb-2">
<a class="btn btn-success" onClick="add()" href="javascript:void(0)"> Create Company</a>
</div>
</div>
</div>
@if ($message = Session::get('success'))
<div class="alert alert-success">
<p>{{ $message }}</p>
</div>
@endif
<div class="card-body">
<table class="table table-bordered" id="ajax-crud-datatable">
<thead>
<tr>
<th>Id</th>
<th>Name</th>
<th>Email</th>
<th>Address</th>
<th>Created at</th>
<th>Action</th>
</tr>
</thead>
</table>
</div>
</div>
<!-- boostrap company model -->
<div class="modal fade" id="company-modal" aria-hidden="true">
<div class="modal-dialog modal-lg">
<div class="modal-content">
<div class="modal-header">
<h4 class="modal-title" id="CompanyModal"></h4>
</div>
<div class="modal-body">
<form action="javascript:void(0)" id="CompanyForm" name="CompanyForm" class="form-horizontal" method="POST" enctype="multipart/form-data">
<input type="hidden" name="id" id="id">
<div class="form-group">
<label for="name" class="col-sm-2 control-label">Company Name</label>
<div class="col-sm-12">
<input type="text" class="form-control" id="name" name="name" placeholder="Enter Company Name" maxlength="50" required="">
</div>
</div>
<div class="form-group">
<label for="name" class="col-sm-2 control-label">Company Email</label>
<div class="col-sm-12">
<input type="email" class="form-control" id="email" name="email" placeholder="Enter Company Email" maxlength="50" required="">
</div>
</div>
<div class="form-group">
<label class="col-sm-2 control-label">Company Address</label>
<div class="col-sm-12">
<input type="text" class="form-control" id="address" name="address" placeholder="Enter Company Address" required="">
</div>
</div>
<div class="col-sm-offset-2 col-sm-10">
<button type="submit" class="btn btn-primary" id="btn-save">Save changes
</button>
</div>
</form>
</div>
<div class="modal-footer">
</div>
</div>
</div>
</div>
<!-- end bootstrap model -->
</body>
<script type="text/javascript">
$(document).ready( function () {
$.ajaxSetup({
headers: {
'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
}
});
$('#ajax-crud-datatable').DataTable({
processing: true,
serverSide: true,
ajax: "{{ url('ajax-crud-datatable') }}",
columns: [
{ data: 'id', name: 'id' },
{ data: 'name', name: 'name' },
{ data: 'email', name: 'email' },
{ data: 'address', name: 'address' },
{ data: 'created_at', name: 'created_at' },
{data: 'action', name: 'action', orderable: false},
],
order: [[0, 'desc']]
});
});
function add(){
$('#CompanyForm').trigger("reset");
$('#CompanyModal').html("Add Company");
$('#company-modal').modal('show');
$('#id').val('');
}
function editFunc(id){
$.ajax({
type:"POST",
url: "{{ url('edit-company') }}",
data: { id: id },
dataType: 'json',
success: function(res){
$('#CompanyModal').html("Edit Company");
$('#company-modal').modal('show');
$('#id').val(res.id);
$('#name').val(res.name);
$('#address').val(res.address);
$('#email').val(res.email);
}
});
}
function deleteFunc(id){
if (confirm("Delete Record?") == true) {
var id = id;
// ajax
$.ajax({
type:"POST",
url: "{{ url('delete-company') }}",
data: { id: id },
dataType: 'json',
success: function(res){
var oTable = $('#ajax-crud-datatable').dataTable();
oTable.fnDraw(false);
}
});
}
}
$('#CompanyForm').submit(function(e) {
e.preventDefault();
var formData = new FormData(this);
$.ajax({
type:'POST',
url: "{{ url('store-company')}}",
data: formData,
cache:false,
contentType: false,
processData: false,
success: (data) => {
$("#company-modal").modal('hide');
var oTable = $('#ajax-crud-datatable').dataTable();
oTable.fnDraw(false);
$("#btn-save").html('Submit');
$("#btn-save"). attr("disabled", false);
},
error: function(data){
console.log(data);
}
});
});
</script>
</html>

Lets go to your browser and run this url

http://127.0.0.1:8000/ajax-crud-datatable

Now its open like this and successfully working and store in database as well.

Thanks 🙏🙏

Tagged : / / / /

PHP: maximum execution time when importing .SQL data file (Maximum execution time of 300 seconds exceeded)

When you install first-time XAMPP and import a large file in the database the that if Maximum execution time of 300 seconds exceeded will be showing this type of error in your database:

So, There’s a configuration variable within the phpMyAdmin directory that you can find in below path-

“C:\xampp\phpMyAdmin\libraries\config.default.php”

after find this below line-

“$cfg[‘ExecTimeLimit’] = 300;”

and replace below line-

“$cfg[‘ExecTimeLimit’] = 0;”

that you can set to whatever maximum execution time you need. After that your problem will be solved.

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@php artisan package:discover –ansi handling the post-autoload-dump event returned with error code 255

When you using “laravel 5.5” downloaded project then showing this type of error, then first open terminal and got to project as below commands

step-1

$ cd project_name

step-2

$ composer update

Step-3

$ composer dump-autoload

After that your problem will be solve. If will not be solve then below commands

Step-4

$ composer require laravel/ui

After that run this commands. you project will be run successfully.

Step-5

$ php artisan serve

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Class ‘App\Http\Controllers\Student’ not found

In this tutorial I’m going to describe how to solve “Class ‘App\Http\Controllers\Student’ not found” if you got this types of error please follow some easy steps

1step this types of error is showing when you’re not using class name whatever you have define below code as like :-

public function index()
{
$students = Student::all();

return view(‘students.dashboard’,compact(‘student’));
}

2nd you have to add your model name above of the StudenController class name

3rd step got your Controller :- StudentController.php

And add model name in the Student Controller class here as like this

use App\Student;

Then refresh your browser and you got solve your errors.

http://127.0.0.1:8000/

Thanks hopefully it will helpful for you. 👍👍

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$_GET and $_POST Variable in PHP

  • $_GET and $_POST is generally used in the forms to transfer data from one file to another file. Both the variables are kind of same except when we need to keep our data secure we use $_POST and generally in the form we use $_POST.

We will see the explanation by a example:

Form.html

Testform.php

In this form we have used “get” method and we will see the output below:

As we can see we have used the method “get” in the form and in the output page of testform.php we can see the input given, also with that in the URL box we can see the details which we have provided in the form.html.

If we use “post” method in the form.html we will see the difference below:

As we can see in the URL box there is no such details provided which we can see while using “post” method.

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Super Global Variables in PHP

  • What is Super Global Variable?

Super global variable is a variable which can be used in two different files for manipulation.

For example we have a variable “a” in File1.php and we need to print, edit or any manipulation needed to be done in the variable in File2.php then we have to use Super Global Variable as a variable in File1.php.

  • Types of Super Global Variable in PHP:-

– $_GET

– $_POST

– $_REQUEST

– $_COOKIE

– $_SESSION

– $_FILES

  • To see the use of variable $_GET and $_POST follow the link given below:

/http://www.scmgalaxy.com/tutorials/_get-and-_post-variable-in-php/

  • Use of variable $_REQUEST

 $_REQUEST can catch the data which is sent using both POST GET methods whereas $_GET and $_POST can catch the data which is sent by get and post.

  • Use of variable $_SERVER

When we use $_SERVER we can extract extra data from the client when the form is filled. Extra data in a sense we can extract:

– HTTP Connection

– Server Information

– Host Information

– URL Information

We can see it with the example given below:

Now when we insert the data in the form.html we will see the following information:

  • Use of $_COOKIE variable:

Cookies are small file that the server embeds on the user’s computer each time the same computer requests a page with a browser it will send the cookie too. With PHP, we can both create and retrieve cookie values.

To create a cookie we need to run the following command:

setcookie()

Syntax:

setcookie(name, value, expire, path, domain, secure, httponly);

In the syntax only the name parameter is mandatory rest other parameters are optional.

Example for creating a cookie:

  • Use of $_SESSION variable

For session variable refer the link given below:

How Session works in PHP

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