Is there a method in PHP to covert a shapefile to GeoJSON? I need to upload shapefile and load it into a PostgreSQL table. I tried PHP exec(), but it didn't work.
exec() should work, what error do you get? And what commands/utilities are you using to convert?
For example with ogr2ogr:
$command = "/usr/bin/ogr2ogr -f GeoJSON output.geojson input.shp"; exec($command);
You should use escapeshellarg if any of these params are coming from user input