Added return type

src/Geometries/GeometryCollection.php

@@ -69,7 +69,7 @@ function ($geometry_string) {
         );
     }
 
-    public function count()
+    public function count(): int
     {
         return count($this->geometries);
     }
@@ -79,7 +79,7 @@ public function count()
      *
      * @return \GeoJson\Geometry\GeometryCollection
      */
-    public function jsonSerialize()
+    public function jsonSerialize(): \GeoJson\Geometry\GeometryCollection
     {
         $geometries = [];
         foreach ($this->geometries as $geometry) {

src/Geometries/LineString.php

@@ -44,7 +44,7 @@ public function __toString()
      *
      * @return \GeoJson\Geometry\LineString
      */
-    public function jsonSerialize()
+    public function jsonSerialize(): \GeoJson\Geometry\LineString
     {
         $points = [];
         foreach ($this->points as $point) {

src/Geometries/MultiLineString.php

@@ -68,7 +68,7 @@ public function __toString()
         }, $this->getLineStrings()));
     }
 
-    public function count()
+    public function count(): int
     {
         return count($this->linestrings);
     }

src/Geometries/MultiPoint.php

@@ -77,7 +77,7 @@ public function __toString()
      *
      * @return \GeoJson\Geometry\MultiPoint
      */
-    public function jsonSerialize()
+    public function jsonSerialize(): \GeoJson\Geometry\MultiPoint
     {
         $points = [];
         foreach ($this->points as $point) {

src/Geometries/MultiPolygon.php

@@ -67,7 +67,7 @@ public static function fromString($wktArgument)
      *       <p>
      *       The return value is cast to an integer.
      */
-    public function count()
+    public function count(): int
     {
         return count($this->polygons);
     }
@@ -121,7 +121,7 @@ protected static function assembleParts(array $parts)
      *
      * @return \GeoJson\Geometry\MultiPolygon
      */
-    public function jsonSerialize()
+    public function jsonSerialize(): \GeoJson\Geometry\MultiPolygon
     {
         $polygons = [];
         foreach ($this->polygons as $polygon) {

src/Geometries/Point.php

@@ -115,7 +115,7 @@ public function __toString()
      *
      * @return \GeoJson\Geometry\Point
      */
-    public function jsonSerialize()
+    public function jsonSerialize(): \GeoJson\Geometry\Point
     {
         $position = [$this->getLng(), $this->getLat()];
         if ($this->is3d()) $position[] = $this->getAlt();

src/Geometries/PointCollection.php

@@ -9,6 +9,7 @@
 use InvalidArgumentException;
 use IteratorAggregate;
 use JsonSerializable;
+use Traversable;
 
 abstract class PointCollection implements IteratorAggregate, Arrayable, ArrayAccess, Countable, JsonSerializable
 {
@@ -46,7 +47,7 @@ public function toArray()
         return $this->points;
     }
 
-    public function getIterator()
+    public function getIterator(): Traversable
     {
         return new ArrayIterator($this->points);
     }
@@ -70,7 +71,7 @@ public function insertPoint($index, Point $point)
         array_splice($this->points, $offset, 0, [$point]);
     }
 
-    public function offsetExists($offset)
+    public function offsetExists($offset): bool
     {
         return isset($this->points[$offset]);
     }
@@ -79,12 +80,12 @@ public function offsetExists($offset)
      * @param mixed $offset
      * @return null|Point
      */
-    public function offsetGet($offset)
+    public function offsetGet($offset): ?Point
     {
         return $this->offsetExists($offset) ? $this->points[$offset] : null;
     }
 
-    public function offsetSet($offset, $value)
+    public function offsetSet($offset, $value): void
     {
         if (!($value instanceof Point)) {
             throw new InvalidArgumentException('$value must be an instance of Point');
@@ -97,12 +98,12 @@ public function offsetSet($offset, $value)
         }
     }
 
-    public function offsetUnset($offset)
+    public function offsetUnset($offset): void
     {
         unset($this->points[$offset]);
     }
 
-    public function count()
+    public function count(): int
     {
         return count($this->points);
     }