https://github.com/alexdodonov/php-2-excel
https://github.com/alexdodonov/php-2-excel
Last synced: 2 months ago
JSON representation
- Host: GitHub
- URL: https://github.com/alexdodonov/php-2-excel
- Owner: alexdodonov
- Created: 2021-01-22T11:47:53.000Z (over 4 years ago)
- Default Branch: master
- Last Pushed: 2021-01-22T11:49:28.000Z (over 4 years ago)
- Last Synced: 2025-07-30T05:49:23.195Z (2 months ago)
- Language: PHP
- Size: 1.95 KB
- Stars: 2
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# Downloading hude amounts of data from DB via PHP
This set of classes will help you to implement iterative creation of files with huge amount of data from database.
# First steps
First of all create class wich will fetch data, process it and contain some utility methods:
```php
class HttpJob implements HttpJobInterface
{
/**
* Amount of data to be processed per one iteration
*
* @var integer
*/
protected $limit = 1;
/**
* Processing data subset. In our case we store data in the CSV file
* And if this file is not yet created, then create one
*/
protected function process(array $data): void
{
if (! isset($_SESSION[$_POST['job-id']]['filename'])) {
$_SESSION[$_POST['job-id']]['filename'] = md5(microtime(true)) . '.csv';
// here we need to create file, because it is not exists yet
}
// and here we can store $data in the file with name $_SESSION[$_POST['job-id']]['filename']
}
/**
* This method returns a subset of required data
* For example SELECT * FROM your_table WHERE %condition% LIMIT %start_index%, $this->limit
*/
protected function getDataBulk(int $from, int $limit): array
{
return [
// some testing data
];
}
/**
* This method calculates totoal amount of data
* for example SELECT COUNT(*) FROM your_table WHERE %condition%
*/
protected function getDataAmount(): int
{
// here we use testing data, but you can fetch it from database
global $testData;
return count($testData);
}
}
```