https://github.com/vtsykun/php-grib2
PHP GRIB2 eccodes
https://github.com/vtsykun/php-grib2
grib2 grib2-php
Last synced: about 1 month ago
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PHP GRIB2 eccodes
- Host: GitHub
- URL: https://github.com/vtsykun/php-grib2
- Owner: vtsykun
- Created: 2023-08-20T19:51:36.000Z (over 1 year ago)
- Default Branch: main
- Last Pushed: 2023-08-28T22:11:18.000Z (over 1 year ago)
- Last Synced: 2025-01-26T09:25:28.558Z (3 months ago)
- Topics: grib2, grib2-php
- Language: PHP
- Homepage:
- Size: 8.7 MB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# PHP GRIB2 eccodes
Simple library to read GRIB2 WMO format with using FFI.
## Purpose
This library shows an example of how to use adapt libeccodes for using with PHP FFI extension to save developers time.
## Install
```
composer require okvpn/grib2-eccodes
```
Install libaec-dev
```
apt install libaec-dev
```
(Optional) Install eccodes lib. See https://confluence.ecmwf.int/display/ECC/ecCodes+installation.
But to simplify distribution, the libeccodes is build-in with data `eccodes.tar.gz`. It will be extracted to tmp dir.
# Usage
```
# Get grib index data
# https://www.ftp.ncep.noaa.gov/data/nccf/com/gfs/prod/gfs./
170:9120456:d=2023081906:RH:575 mb:3 hour fcst:
171:9195051:d=2023081906:TCDC:575 mb:3 hour fcst:
172:9235360:d=2023081906:VVEL:575 mb:3 hour fcst:
173:9325082:d=2023081906:DZDT:575 mb:3 hour fcst:
174:9400873:d=2023081906:UGRD:575 mb:3 hour fcst:
175:9480146:d=2023081906:VGRD:575 mb:3 hour fcst:
176:9560543:d=2023081906:ABSV:575 mb:3 hour fcst:
177:9632016:d=2023081906:CLWMR:575 mb:3 hour fcst:
```
Download Grib2 archive
```php
$curl = new CurlHttpClient();
// Select 174:9400873:d=2023081906:UGRD:575 mb:3 hour fcst:
// Use http 206 Partial Content feature to downlaod only one param
$res = $curl->request('GET', 'https://www.ftp.ncep.noaa.gov/data/nccf/com/gfs/prod/gfs./
file_put_contents("VGRD.p1", $res->getContent())
```
```php
require_once __DIR__ . '/vendor/autoload.php';
use FFI;
use Okvpn\Grib2\Grib2Reader;
use Okvpn\Grib2\LibEccodes;
LibEccodes::$libPath = "libeccodes.so"; // . use fill path if installed eccodes to custom path
$reader = new Grib2Reader();
$data = $reader->read("VGRD.p1");
print_r($data);
$matrix = $reader->read2D("VGRD.p1", lat1: 48, lat2: 57, lon1: 13, lon2: 36);
foreach ($matrix as $i => &$vals) {
foreach ($vals as $j => &$val) {
$val = ($s = strlen($val = round($val))) >= 3 ? $val : $val . str_repeat(' ', 3-$s);
}
}
```
Output
```
5 6 5 3 3 3 3 5 4 4 5 5 5 7 7 7 4 9 6 6 9 5 7 8
5 7 5 2 0 2 2 1 -0 1 2 2 4 4 5 6 6 7 6 6 5 5 6 6
4 6 5 3 2 2 0 0 1 2 1 1 2 3 2 2 3 1 1 1 2 2 5 4
5 5 5 3 3 2 2 1 3 5 6 5 4 3 3 2 -0 -1 -1 -2 -2 -3 -3 -1
6 6 5 3 3 3 2 4 4 5 4 4 4 4 2 1 0 -0 -0 -2 -1 -1 -3 -4
5 6 6 1 2 2 2 3 4 4 3 2 3 2 2 3 0 0 -0 -2 -1 -1 -2 -3
5 4 1 1 1 0 1 4 3 1 2 1 2 3 4 3 2 0 -1 -0 -2 -2 -2 -3
4 1 1 1 0 1 2 2 2 1 2 2 3 2 3 3 1 0 -0 -1 -2 -3 -4 -3
2 0 1 -1 -0 1 2 1 0 1 1 2 3 3 1 1 0 -0 0 0 -1 -3 -5 -4
-1 -1 -3 -2 -0 -1 -2 -2 -2 -1 0 2 2 2 2 1 0 0 -0 -1 -1 -3 -5 -5
```
License
-------
MIT License.