CategoryPHP

Random unique alphanumeric string

HI gays ,

Here is a function to generate random unique alphanumeric string using PHP,

I am sure it will help some one to solve their problem

  function get_rand_txn_id($length = 10) {


        $randstring = '';
        $string_array = array_merge(range(0, 9), range('a', 'z'), range('A', 'Zå'));

        for ($i = 0; $i < $length; $i++) {
            $randstring .= $string_array[array_rand($string_array)];
        }

        return $randstring;
    }

 

 

 

 

 

6,579 total views, 24 views today

Helper classess in laravel

      In most case, we want to extend our Laravel applications capabilities by adding helper class.
It is not a best practice to insert this classess inside Controller and Model.

so we have to write our classess in separate files and group it by folder

Here let us have a look how we add helper classess in laravel

1.    We have app folder on root folder of laravel.There we can create a Libraries folder inside app folder.

2.  We can create a class/helper file and we can write a our custom class there, on the top of custom class we have to define namespace our_folder_name;




 

namespace our_folder_name

for example ,

 
//here my folder name is Libraries
namespace Libraries;

class className{
    
    //class methodes
    
}

Now we can go to our controller and on top we can include our helper class

use Libraries\filename as filename;

And we can go to compser, inside autoloder we can add “app/foldername”

app/foldername

 

"autoload": {
		"classmap": [
			"app/commands",
			"app/controllers",
			"app/models",
			"app/database/migrations",
			"app/database/seeds",
			"app/tests/TestCase.php",
 			"app/Libraries",// we've added classes folder on compose
		]
	},

 




And we can update composer by using below comment

 composer dump

Now we can use our helper class in our controller

  $test = new className();

All my samples files are given below
Library/className.php

<?php
 namespace Libraries;

class className{
    
    //class methodes
    
    function testmesthode(){
        
        return "Hello world";
    }
    
}

testController.php

<?php

use Libraries\className as className;

class testController extends BaseController {
    
    
    function index(){
        
        $test = new className();
        echo $test->testmesthode();

    }
    
}

compser file

"autoload": {
		"classmap": [
			"app/commands",
			"app/controllers",
			"app/models",
			"app/database/migrations",
			"app/database/seeds",
			"app/tests/TestCase.php",
 			"app/Libraries",// we've added classes folder on Laravel ClassLoader
		]
	},



1,486 total views, 3 views today

Global Config values In Laravel

Today I want to create a page for sending contact us mail in site,

For that I have to define admin mail id and admin name as a config value and i want to access the same in same in many  places,

I had googled for some time , to find out how can i define my constant in laravel and one of my friend (Ranjith) help to do that ,

Here i am writing how we can use a  Config values   in laravel,

1. If we want to define all our constants in a custom page ,

We can create a page (Here i am calling constants.php )
and inside that we can define like key value pair

return array(
 'custome_name' =>'custome_value',
)

And we call the values as below

$cvalue = Config::get('filename.custome_name');

Here we will get our custom_value in $cvalue

Let us look an example

<?php

return array(

    'admin_email' =>'mail@shabeebk.com',
    'admin_name' =>'Admin',
  

);
?>

Now let us see How we can retrieve the config in your code somewhere

echo  Config::get('constants.admin_email');
echo  Config::get('constants.admin_name')

Hope it will help some one 🙂

Thank you Ranjith

I made small changes,

thank you Martin Tonev for correcting from variable to config

10,648 total views, 13 views today

Install Constant Contact in Laravel

To setup an option for newsletter signup with Constant Contact and Laravel Framework

  1. Install PHP5 Curl using the below command
    sudo apt-get install php5-curl
    
  2. Add the below code in composer.json
    "require": {
               "laravel/framework": "4.2.*",
               "curl/curl": "1.2.*",
               "constantcontact/constantcontact": "1.2.*"
    	},
    
  3. Run the below command to install constant contact in laravel
    composer update
    

     

1,397 total views, 5 views today

How to install Laravel in MAMP-MAC

Today i was trying to install laravel in MAMP , While going through their step on laravel site mentioned i found that i didn installed mycript extension. I had googled for lot of time and lastly i installed .

I am writing this will help some one to install laravel in Mac using MAMP.

Install composer

Before installing laravel we have to install composer . We can go to https://getcomposer.org/ and we can install from from there or we can follow the following steps step

1. first we have to check curl is enabled . step 2. we can install composer globally as mentioned in their site

curl -sS https://getcomposer.org/installer | php
mv composer.phar /usr/local/bin/composer

Install Laravel 

1.once we installed composer we have to move to htdocs and to our directory from our terminal

cd /directory/folder

2. We can tell composer to download laravel  and install by following commands

composer global require "laravel/installer=~1.1"
composer create-project laravel/laravel your-project-name --prefer-dist

And here it will come to as for mycrypt extension .

Mcrypt PHP extension required.

To solve this issue we have to check the php version frist

php -v

shabeebk.com-php-version-check

   3.Now let us have our PHP version, in my case 5.6.2, we can open our .bash_profile script

nano .bash_profile

4. Add our MAMP PHP version after the code already present ,Exit the file and Save   it.

export MAMP_PHP=/Applications/MAMP/bin/php/php5.5.10/bin
export PATH="$MAMP_PHP:$PATH"

5. Now we can try to install Laravel  again That is it!.

composer create-project laravel/laravel your-project-name --prefer-dist

 

6. We can see Laravel is downloading and installing

laraval-install-mac_1

laraval-install-2

laraval-install-3

laraval-install-4

  Finally it will show like installed. Application key (*******) installed successfully.

 

Now let us go to browser and check the URL.

Screen Shot 2014-12-25 at 9.56.18 pm

That is it!

 

 

 

6,521 total views, 11 views today

Force download file php


Hi,

Today we are going to learn about force downloading prompt in PHP.

While i am doing my projects, i had a requirement for file download, File type will be changed, So i made a research on this and made simple useful script which can be use any where to prompt download by giving path and file name . Let us create a function download_file and pass full file path and filename , we can use third argument to mention the MIME Type of file

download_file($sourceFile, $fileName, $mime_type = '') 

Next we can check whether we have permission to read the file.if not it will return 404 error

 if (!is_readable($sourceFile)) {
        header("HTTP/1.1 404 Not Found");
        return;
    }

Now we are going to create an array of list of mime types. so we can compare with this array and set correct header content type

 $mime_types_list = array(
        "gif" => "image/gif",
        "png" => "image/png",
        "jpeg" => "image/jpg",
        "jpg" => "image/jpg",
        "pdf" => "application/pdf",
        "csv" => "application/csv",
        "txt" => "text/plain",
        "html" => "text/html",
        "htm" => "text/html",
        "exe" => "application/octet-stream",
        "zip" => "application/zip",
        "doc" => "application/msword",
        "xls" => "application/vnd.ms-excel",
        "ppt" => "application/vnd.ms-powerpoint",
        "php" => "text/plain"
    );

Next we are going to set mime type if we already pass the MIME type into function it will take that MIME ,else we are going to use a function pathinfo to retrieve the extension of file and we will compare with already created array to get content type

 $path_parts = pathinfo($sourceFile); //pathinfo 



    if ($mime_type == '') {

        $file_extension = $path_parts['extension'];
        if (array_key_exists($file_extension, $mime_types_list)) {
            $mime_type = $mime_types_list[$file_extension];
        } else {
            $mime_type = "application/force-download";
        };
    };

After that we will clean and start the output buffer

  @ob_end_clean();

Then we can set the content type and headers

if (ini_get('zlib.output_compression'))
        ini_set('zlib.output_compression', 'Off');

    header('Content-Type: ' . $mime_type);
    header('Content-Disposition: attachment; filename="' . $fileName . '"');
    header("Content-Transfer-Encoding: binary");
    header('Accept-Ranges: bytes');
    header("Cache-control: private");
    header('Pragma: private');

lastly we are going to read each line by line and print that as shown below.

$chunksize = 1 * (1024 * 1024);
    $bytes_send = 0;
    if ($sourceFile = fopen($sourceFile, 'r')) {


        while (!feof($sourceFile) &&
        (!connection_aborted())
        ) {
            $buffer = fread($sourceFile, $chunksize);
            print($buffer); // is also possible
            flush();
        }
        fclose($sourceFile);
    } else {
        header("HTTP/1.1 505 Internal server error");
        return;
    }

That is it !!!!! Now we can have a look, How we can read the file using created function We can make a path file and the name we want to give while downloading and pass to function . It will download prompt for file. example for reading file and download prompt

$filepath = 'sample.pdf';
$filename = 'sample.pdf';

download_file($filepath, $filename);
exit;
?>

Full code

<?php

/**
 * function to download a file from server
 * 
 * list all the values in grid
 * 
 * @auther Shabeeb  <me@blog.shabeebk.com >
 * @createdon   : 06-08-2014
 * @
 * 
 * @param source $sourceFile : file pathe 
 * @param source $fileName : file name for download 
 * @param source $mime_type : MIME type optional field
 * @return type
 * exceptions
 * 
 * 
 */
function download_file($sourceFile, $fileName, $mime_type = '') {

    if (!is_readable($sourceFile)) {
        header("HTTP/1.1 404 Not Found");
        return;
    }

    $size = filesize($sourceFile);
    $fileName = rawurldecode($fileName);


    $mime_types_list = array(
        "gif" => "image/gif",
        "png" => "image/png",
        "jpeg" => "image/jpg",
        "jpg" => "image/jpg",
        "pdf" => "application/pdf",
        "csv" => "application/csv",
        "txt" => "text/plain",
        "html" => "text/html",
        "htm" => "text/html",
        "exe" => "application/octet-stream",
        "zip" => "application/zip",
        "doc" => "application/msword",
        "xls" => "application/vnd.ms-excel",
        "ppt" => "application/vnd.ms-powerpoint",
        "php" => "text/plain"
    );

    $path_parts = pathinfo($sourceFile); //pathinfo 



    if ($mime_type == '') {

        $file_extension = $path_parts['extension'];
        if (array_key_exists($file_extension, $mime_types_list)) {
            $mime_type = $mime_types_list[$file_extension];
        } else {
            $mime_type = "application/force-download";
        };
    };

    @ob_end_clean();

    // if IE, otherwise Content-Disposition ignored
    if (ini_get('zlib.output_compression'))
        ini_set('zlib.output_compression', 'Off');

    header('Content-Type: ' . $mime_type);
    header('Content-Disposition: attachment; filename="' . $fileName . '"');
    header("Content-Transfer-Encoding: binary");
    header('Accept-Ranges: bytes');
    header("Cache-control: private");
    header('Pragma: private');


    $chunksize = 1 * (1024 * 1024);
    $bytes_send = 0;
    if ($sourceFile = fopen($sourceFile, 'r')) {


        while (!feof($sourceFile) &&
        (!connection_aborted())
        ) {
            $buffer = fread($sourceFile, $chunksize);
            print($buffer); // is also possible
            flush();
        }
        fclose($sourceFile);
    } else {
        header("HTTP/1.1 505 Internal server error");
        return;
    }

    die();
}

$filepath = 'sample.pdf';
$filename = 'sample.pdf';

download_file($filepath, $filename);
exit;
?>

Download the source

906 total views, 4 views today

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