ignore utf-8 chars that don't fit into CP437

Author: splitbrain

src/Zip.php

@@ -654,7 +654,7 @@ protected function cpToUtf8($string)
     protected function utf8ToCp($string)
     {
         if (function_exists('iconv')) {
-            return iconv('UTF-8', 'CP437', $string);
+            return iconv('UTF-8', 'CP437//IGNORE', $string);
         } elseif (function_exists('mb_convert_encoding')) {
             return mb_convert_encoding($string, 'CP850', 'UTF-8');
         } else {
@@ -863,7 +863,7 @@ protected function encodeFilename($original)
             1, // version
             crc32($original) // crc
         );
-        $extra.= $original;
+        $extra .= $original;
 
         return array($cp437, $extra);
     }

tests/zip.test.php

@@ -162,6 +162,7 @@ public function test_utf8() {
         $zip = new Zip();
         $zip->create($archive);
         $zip->addData('tüst.txt', 'test');
+        $zip->addData('snowy☃.txt', 'test');
         $zip->close();
         $this->assertFileExists($archive);
 
@@ -170,6 +171,7 @@ public function test_utf8() {
         $zip->extract($extract);
 
         $this->assertFileExists($extract.'/tüst.txt');
+        $this->assertFileExists($extract.'/snowy☃.txt');
 
         $this->nativeCheck($archive);
         $this->native7ZipCheck($archive);