docs: do not show unneeded <?php in sample code

Author: kenjis

user_guide_src/source/database/connecting.rst

@@ -17,6 +17,7 @@ function where it is needed, or in your class constructor to make the
 database available globally in that class.
 
 .. literalinclude:: connecting/001.php
+    :lines: 2-
 
 If the above function does **not** contain any information in the first
 parameter, it will connect to the default group specified in your database config
@@ -26,6 +27,7 @@ A convenience method exists that is purely a wrapper around the above line
 and is provided for your convenience:
 
 .. literalinclude:: connecting/002.php
+    :lines: 2-
 
 Available Parameters
 --------------------
@@ -45,6 +47,7 @@ specify a particular database group from your config file. Examples:
 To choose a specific group from your config file you can do this:
 
 .. literalinclude:: connecting/003.php
+    :lines: 2-
 
 Where ``group_name`` is the name of the connection group from your config
 file.
@@ -57,6 +60,7 @@ database connection every time. If you need to have a separate connection
 to the same database, send ``false`` as the second parameter:
 
 .. literalinclude:: connecting/004.php
+    :lines: 2-
 
 Connecting to Multiple Databases
 ================================
@@ -65,6 +69,7 @@ If you need to connect to more than one database simultaneously you can
 do so as follows:
 
 .. literalinclude:: connecting/005.php
+    :lines: 2-
 
 Note: Change the words ``group_one`` and ``group_two`` to the specific
 group names you are connecting to.
@@ -82,6 +87,7 @@ a connection that uses your custom settings. The array passed in must be
 the same format as the groups are defined in the configuration file:
 
 .. literalinclude:: connecting/006.php
+    :lines: 2-
 
 Reconnecting / Keeping the Connection Alive
 ===========================================
@@ -96,6 +102,7 @@ or re-establish it.
     does not ping the server but it closes the connection then connects again.
 
 .. literalinclude:: connecting/007.php
+    :lines: 2-
 
 Manually Closing the Connection
 ===============================
@@ -104,3 +111,4 @@ While CodeIgniter intelligently takes care of closing your database
 connections, you can explicitly close the connection.
 
 .. literalinclude:: connecting/008.php
+    :lines: 2-