Add Echo

1 files changed, 17 insertions, 0 deletions

diff --git a/Echo/includes/iterator/CallbackIterator.php b/Echo/includes/iterator/CallbackIterator.php
new file mode 100644
index 00000000..c4b7926b
--- /dev/null
+++ b/Echo/includes/iterator/CallbackIterator.php
@@ -0,0 +1,17 @@
+<?php
+
+/**
+ * Applies a callback to all values returned from the iterator
+ */
+class EchoCallbackIterator extends EchoIteratorDecorator {
+	protected $callable;
+
+	public function __construct( Iterator $iterator, $callable ) {
+		parent::__construct( $iterator );
+		$this->callable = $callable;
+	}
+
+	public function current() {
+		return call_user_func( $this->callable, $this->iterator->current() );
+	}
+}