Initial

geojson.php

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+<?php
+/*
+ * Title:   CSV to GeoJSON
+ * Notes:   Convert a comma separated CSV file of points with x & y fields to GeoJSON format, suitable for use in OpenLayers, Leaflet, etc. Only point features are supported.
+ * Author:  Bryan R. McBride, GISP
+ * Contact: bryanmcbride.com
+ * GitHub:  https://github.com/bmcbride/PHP-Database-GeoJSON
+*/
+# Read the CSV file
+$csvfile = 'positions.txt';
+$handle = fopen($csvfile, 'r');
+# Build GeoJSON feature collection array
+$geojson = array(
+    'type' => 'FeatureCollection',
+    'features' => array()
+);
+# Loop through rows to build feature arrays
+$header = NULL;
+while (($row = fgetcsv($handle, 1000, ',')) !== FALSE) {
+    if (!$header) {
+        $header = $row;
+    } else {
+        $data = array_combine($header, $row);
+        $properties = $data;
+        # Remove x and y fields from properties (optional)
+        unset($properties['x']);
+        unset($properties['y']);
+        $feature = array(
+            'type' => 'Feature',
+            'geometry' => array(
+                'type' => 'Point',
+                'coordinates' => array(
+                    $data['x'],
+                    $data['y']
+                )
+            ),
+            'properties' => $properties
+        );
+        # Add feature arrays to feature collection array
+        #array_push($geojson['features'], $feature);
+    }
+}
+array_push($geojson['features'], $feature);
+fclose($handle);
+header('Content-type: application/json');
+header("Access-Control-Allow-Origin: *");
+echo json_encode($geojson, JSON_NUMERIC_CHECK);
+?>