PHP code example of proj4php / proj4php

1. Go to this page and download the library: Download proj4php/proj4php library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php.

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

proj4php / proj4php example snippets


// Use a PSR-4 autoloader for the `proj4php` root namespace.
t;

// Initialise Proj4
$proj4 = new Proj4php();

// Create two different projections.
$projL93    = new Proj('EPSG:2154', $proj4);
$projWGS84  = new Proj('EPSG:4326', $proj4);

// Create a point.
$pointSrc = new Point(652709.401, 6859290.946, $projL93);
echo "Source: " . $pointSrc->toShortString() . " in L93 <br>";

// Transform the point between datums.
$pointDest = $proj4->transform($projWGS84, $pointSrc);
echo "Conversion: " . $pointDest->toShortString() . " in WGS84<br><br>";

// Source: 652709.401 6859290.946 in L93
// Conversion: 2.3557811127971 48.831938054369 in WGS84


// add it to proj4
$proj4->addDef("EPSG:27700",'+proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000 +y_0=-100000 +ellps=airy +datum=OSGB36 +units=m +no_defs');

// then Create your projections
$projOSGB36 = new Proj('EPSG:27700',$proj4);


// Create your projection
$projOSGB36 = new Proj('+proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000 +y_0=-100000 +ellps=airy +datum=OSGB36 +units=m +no_defs',$proj4);


$projOSGB36 = new Proj('PROJCS["OSGB 1936 / British National Grid",GEOGCS["OSGB 1936",DATUM["OSGB_1936",SPHEROID["Airy 1830",6377563.396,299.3249646,AUTHORITY["EPSG","7001"]],AUTHORITY["EPSG","6277"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4277"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",49],PARAMETER["central_meridian",-2],PARAMETER["scale_factor",0.9996012717],PARAMETER["false_easting",400000],PARAMETER["false_northing",-100000],AUTHORITY["EPSG","27700"],AXIS["Easting",EAST],AXIS["Northing",NORTH]]',$proj4);