for now, add example

Author: chobie

example/clone.php

@@ -0,0 +1,2 @@
+<?php
+$repo = git_clone("https://github.com/chobie/php-protocolbuffers", "/tmp/protocolbuffers");

example/ref_lookup.php

@@ -0,0 +1,6 @@
+<?php
+$repo = git_repository_open("../");
+
+$ref = git_reference_dwim($repo, "functions");
+$obj =  git_reference_peel($ref, GIT_OBJ_ANY);
+echo git_object_id($obj);

example/revwalk.php

@@ -0,0 +1,8 @@
+<?php
+$repo = git_repository_open("../");
+$walker = git_revwalk_new($repo);
+git_revwalk_push_range($walker, "HEAD~20..HEAD");
+
+while ($id = git_revwalk_next($walker)) {
+    echo $id . PHP_EOL;
+}

example/walking.php

@@ -0,0 +1,8 @@
+<?php
+$repo = git_repository_open("../");
+$obj = git_revparse_single($repo, "HEAD^{tree}");
+
+$payload = array();
+git_tree_walk($obj, GIT_TREEWALK_PRE, function($root, $entry, &$payload) {
+    echo git_tree_entry_name($entry) . PHP_EOL;
+}, $payload);

reference.c

@@ -858,11 +858,12 @@ PHP_FUNCTION(git_reference_peel)
 {
 	php_git2_t *result = NULL, *_ref = NULL;
 	git_object *out = NULL;
-	zval *ref = NULL, *type = NULL;
+	zval *ref = NULL;
 	int error = 0;
+	long type = 0;
 
 	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,
-		"r<git_otype>", &ref, &type) == FAILURE) {
+		"rl", &ref, &type) == FAILURE) {
 		return;
 	}