php: rename credentials to channel_credentials
diff --git a/src/php/ext/grpc/channel.c b/src/php/ext/grpc/channel.c
index 5554193..f8c4f04 100644
--- a/src/php/ext/grpc/channel.c
+++ b/src/php/ext/grpc/channel.c
@@ -52,7 +52,7 @@
 #include <grpc/grpc_security.h>
 
 #include "completion_queue.h"
-#include "credentials.h"
+#include "channel_credentials.h"
 #include "server.h"
 #include "timeval.h"
 
@@ -125,14 +125,15 @@
 
 /**
  * Construct an instance of the Channel class. If the $args array contains a
- * "credentials" key mapping to a Credentials object, a secure channel will be
- * created with those credentials.
+ * "credentials" key mapping to a ChannelCredentials object, a secure channel
+ * will be created with those credentials.
  * @param string $target The hostname to associate with this channel
  * @param array $args The arguments to pass to the Channel (optional)
  */
 PHP_METHOD(Channel, __construct) {
   wrapped_grpc_channel *channel =
-      (wrapped_grpc_channel *)zend_object_store_get_object(getThis() TSRMLS_CC);
+      (wrapped_grpc_channel *)zend_object_store_get_object(
+          getThis() TSRMLS_CC);
   char *target;
   int target_length;
   zval *args_array = NULL;
@@ -153,7 +154,8 @@
     array_hash = Z_ARRVAL_P(args_array);
     if (zend_hash_find(array_hash, "credentials", sizeof("credentials"),
                        (void **)&creds_obj) == SUCCESS) {
-      if (zend_get_class_entry(*creds_obj TSRMLS_CC) != grpc_ce_channel_credentials) {
+      if (zend_get_class_entry(*creds_obj TSRMLS_CC) !=
+          grpc_ce_channel_credentials) {
         zend_throw_exception(spl_ce_InvalidArgumentException,
                              "credentials must be a ChannelCredentials object",
                              1 TSRMLS_CC);