diff --git a/ext/spl/doxygen.cfg b/ext/spl/doxygen.cfg
index a575dafd901..1d79e40465f 100755
--- a/ext/spl/doxygen.cfg
+++ b/ext/spl/doxygen.cfg
@@ -9,7 +9,7 @@ OUTPUT_DIRECTORY       =
 CREATE_SUBDIRS         = NO
 OUTPUT_LANGUAGE        = English
 USE_WINDOWS_ENCODING   = YES
-BRIEF_MEMBER_DESC      =
+BRIEF_MEMBER_DESC      = NO
 REPEAT_BRIEF           = YES
 ABBREVIATE_BRIEF       = 
 ALWAYS_DETAILED_SEC    = YES
@@ -22,8 +22,8 @@ JAVADOC_AUTOBRIEF      = YES
 MULTILINE_CPP_IS_BRIEF = YES
 DETAILS_AT_TOP         = NO
 INHERIT_DOCS           = YES
-DISTRIBUTE_GROUP_DOC   = NO
-TAB_SIZE               = 8
+DISTRIBUTE_GROUP_DOC   = YES
+TAB_SIZE               = 4
 ALIASES                = 
 OPTIMIZE_OUTPUT_FOR_C  = NO
 OPTIMIZE_OUTPUT_JAVA   = NO
@@ -96,8 +96,8 @@ VERBATIM_HEADERS       = YES
 #---------------------------------------------------------------------------
 # configuration options related to the alphabetical class index
 #---------------------------------------------------------------------------
-ALPHABETICAL_INDEX     = NO
-COLS_IN_ALPHA_INDEX    = 5
+ALPHABETICAL_INDEX     = YES
+COLS_IN_ALPHA_INDEX    = 4
 IGNORE_PREFIX          = 
 #---------------------------------------------------------------------------
 # configuration options related to the HTML output
@@ -116,8 +116,8 @@ GENERATE_CHI           = NO
 BINARY_TOC             = NO
 TOC_EXPAND             = NO
 DISABLE_INDEX          = NO
-ENUM_VALUES_PER_LINE   = 4
-GENERATE_TREEVIEW      = NO
+ENUM_VALUES_PER_LINE   = 1
+GENERATE_TREEVIEW      = YES
 TREEVIEW_WIDTH         = 250
 #---------------------------------------------------------------------------
 # configuration options related to the LaTeX output
@@ -201,12 +201,12 @@ UML_LOOK               = NO
 TEMPLATE_RELATIONS     = NO
 INCLUDE_GRAPH          = YES
 INCLUDED_BY_GRAPH      = YES
-CALL_GRAPH             = NO
+CALL_GRAPH             = YES
 GRAPHICAL_HIERARCHY    = YES
 DOT_IMAGE_FORMAT       = png
 DOT_PATH               = 
 DOTFILE_DIRS           = 
-MAX_DOT_GRAPH_WIDTH    = 1024
+MAX_DOT_GRAPH_WIDTH    = 1200
 MAX_DOT_GRAPH_HEIGHT   = 1024
 MAX_DOT_GRAPH_DEPTH    = 0
 GENERATE_LEGEND        = YES