Merge pull request #90 from kolydart/multibyte_split_chunk

multibyte split chunk

src/VCard.php

@@ -608,7 +608,27 @@ protected function fold($text)
  }
 
  // split, wrap and trim trailing separator
- return substr(chunk_split($text, 73, "\r\n "), 0, -3);
+ return substr($this->chunk_split_unicode($text, 73, "\r\n "), 0, -3);
+ }
+
+ /**
+ * multibyte word chunk split
+ * @link http://php.net/manual/en/function.chunk-split.php#107711
+ * 
+ * @param string $body The string to be chunked.
+ * @param integer $chunklen The chunk length.
+ * @param string $end The line ending sequence.
+ * @return string Chunked string
+ */
+ protected function chunk_split_unicode($body, $chunklen = 76, $end = "\r\n")
+ {
+ $array = array_chunk(
+ preg_split("//u", $body, -1, PREG_SPLIT_NO_EMPTY), $chunklen);
+ $body = "";
+ foreach ($array as $item) {
+ $body .= join("", $item) . $end;
+ }
+ return $body;
  }
 
  /**

tests/VCardTest.php

@@ -426,4 +426,23 @@ public function testSpecialFirstNameAndLastName2()
 
  $this->assertEquals('garcon-jeroen', $this->vcard->getFilename());
  }
+
+ public function testChunkSplitUnicode()
+ {
+ $class_handler = new \ReflectionClass('JeroenDesloovere\VCard\VCard');
+ $method_handler = $class_handler->getMethod('chunk_split_unicode');
+ $method_handler->setAccessible(true);
+
+ $ascii_input="Lorem ipsum dolor sit amet,";
+ $ascii_output = $method_handler->invokeArgs(new VCard(), [$ascii_input,10,'|']);
+ $unicode_input='Τη γλώσσα μου έδωσαν ελληνική το σπίτι φτωχικό στις αμμουδιές του Ομήρου.';
+ $unicode_output = $method_handler->invokeArgs(new VCard(), [$unicode_input,10,'|']);
+
+ $this->assertEquals(
+ "Lorem ipsu|m dolor si|t amet,|",
+ $ascii_output);
+ $this->assertEquals(
+ "Τη γλώσσα |μου έδωσαν| ελληνική |το σπίτι φ|τωχικό στι|ς αμμουδιέ|ς του Ομήρ|ου.|",
+ $unicode_output);
+ }
 }