Implement JsonSerializable

src/Stringy.php

@@ -7,10 +7,11 @@
 use Countable;
 use Exception;
 use InvalidArgumentException;
+use JsonSerializable;
 use IteratorAggregate;
 use OutOfBoundsException;
 
-class Stringy implements Countable, IteratorAggregate, ArrayAccess
+class Stringy implements Countable, IteratorAggregate, ArrayAccess, JsonSerializable
 {
     /**
      * An instance's string.
@@ -83,6 +84,15 @@ public function __toString()
         return $this->str;
     }
 
+    /**
+     * Returns value which can be serialized by json_encode().
+     *
+     * @return string The current value of the $str property
+     */
+    public function jsonSerialize() {
+        return (string) $this;
+    }
+
     /**
      * Returns a new string with $string appended.
      *

tests/StringyTest.php

@@ -56,6 +56,14 @@ public function testToString($expected, $str)
         $this->assertEquals($expected, (string) new S($str));
     }
 
+    /**
+     * @dataProvider toStringProvider()
+     */
+    public function testToJson($expected, $str)
+    {
+        $this->assertEquals('"  foo bar  "', json_encode(new S('  foo bar  ')));
+    }
+
     public function toStringProvider()
     {
         return [