Added "split" filter aka explode.

doc/filters/index.rst

@@ -18,6 +18,7 @@ Filters
     lower
     striptags
     join
+    split
     reverse
     length
     sort

doc/filters/split.rst

@@ -0,0 +1,16 @@
+``split``
+========
+
+The ``split`` filter returns a list of items from a string that's separated by the provided delimiter or glue:
+
+.. code-block:: jinja
+
+    {{ "one,two,three"|split(',') }}
+    {# returns [one, two, three] #}
+
+A limit parameter is available which the returned list will contain a maximum of limit elements with the last element containing the rest of string. 
+
+.. code-block:: jinja
+
+    {{ "one,two,three,four,five"|split(',', 3) }}
+    {# returns [one, two, "three,four,five"] #}

lib/Twig/Extension/Core.php

@@ -145,6 +145,7 @@ public function getFilters()
 
             // array helpers
             'join'    => new Twig_Filter_Function('twig_join_filter'),
+            'split'   => new Twig_Filter_Function('twig_split_filter'),
             'sort'    => new Twig_Filter_Function('twig_sort_filter'),
             'merge'   => new Twig_Filter_Function('twig_array_merge'),
 
@@ -650,6 +651,38 @@ function twig_join_filter($value, $glue = '')
     return implode($glue, (array) $value);
 }
 
+/**
+ * Splits the values into an array.
+ *
+ * The second parameter is option for the limit.
+ *
+ * <pre>
+ *  {{ "one,two,three"|split(',') }}
+ *  {# returns [one, two, three] #}
+ *
+ *  {{ "one,two,three,four,five"|split(',', 3) }}
+ *  {# returns [one, two, "three,four,five"] #}
+ * </pre>
+ *
+ * @param string  $value A string
+ * @param string  $delimiter The separator to explode by
+ * @param integer $limit  The limit
+ *
+ * @return string The explode'ed string
+ */
+function twig_split_filter($value, $delimiter, $limit = null)
+{
+    if (is_empty($delimiter)) {
+        throw new Twig_Error_Runtime('The string to split must be provided with a delimiter.');
+    }
+
+    if (!is_null($limit)) {
+        return explode($delimiter, $value, $limit);
+    }
+
+    return explode($delimiter, $value);
+}
+
 // The '_default' filter is used internally to avoid using the ternary operator
 // which costs a lot for big contexts (before PHP 5.4). So, on average,
 // a function call is cheaper.

test/Twig/Tests/Fixtures/filters/split.test

@@ -0,0 +1,12 @@
+--TEST--
+"split" filter
+--TEMPLATE--
+{{ "one,two,three,four,five"|split(',')|join('-') }}
+{{ foo|split(',')|join('-') }}
+{{ bar|split(',', 3)|join('-') }}
+--DATA--
+return array('foo' => "one,two,three,four,five", 'bar' => "one,two,three,four,five")
+--EXPECT--
+one-two-three-four-five
+one-two-three-four-five
+one-two-three,four,five