Add stripWhitespace

src/Stringy.php

@@ -1249,6 +1249,18 @@ class Stringy implements Countable, IteratorAggregate, ArrayAccess
         return $array;
     }
 
+    /**
+     * Strip all whitespace characters. This includes tabs and newline
+     * characters, as well as multibyte whitespace such as the thin space
+     * and ideographic space.
+     *
+     * @return Stringy Object with whitespace stripped
+     */
+    public function stripWhitespace()
+    {
+        return $this->regexReplace('[[:space:]]+', '');
+    }
+
     /**
      * Returns the substring beginning at $start with the specified $length.
      * It differs from the mb_substr() function in that providing a $length of

tests/StringyTest.php

@@ -1727,6 +1727,36 @@ class StringyTestCase extends PHPUnit_Framework_TestCase
         );
     }
 
+    /**
+     * @dataProvider stripWhitespaceProvider()
+     */
+    public function testStripWhitespace($expected, $str, $encoding = null)
+    {
+        $stringy = S::create($str, $encoding);
+        $result = $stringy->stripWhitespace();
+        $this->assertStringy($result);
+        $this->assertEquals($expected, $result);
+        $this->assertEquals($str, $stringy);
+    }
+
+    public function stripWhitespaceProvider()
+    {
+        return array(
+            array('foobar', '  foo   bar  '),
+            array('teststring', 'test string'),
+            array('Οσυγγραφέας', '   Ο     συγγραφέας  '),
+            array('123', ' 123 '),
+            array('', ' ', 'UTF-8'), // no-break space (U+00A0)
+            array('', '           ', 'UTF-8'), // spaces U+2000 to U+200A
+            array('', ' ', 'UTF-8'), // narrow no-break space (U+202F)
+            array('', ' ', 'UTF-8'), // medium mathematical space (U+205F)
+            array('', '　', 'UTF-8'), // ideographic space (U+3000)
+            array('123', '  1  2  3　　', 'UTF-8'),
+            array('', ' '),
+            array('', ''),
+        );
+    }
+
     /**
      * @dataProvider substrProvider()
      */