diff --git a/runtime/syntax/php.vim b/runtime/syntax/php.vim
index d494a92..3019a42 100644
--- a/runtime/syntax/php.vim
+++ b/runtime/syntax/php.vim
@@ -55,11 +55,8 @@
 "    ii) Same problem if you are setting php_folding = 2 with a closing
 "        } inside an string on the first line of this string.
 
-" For version 5.x: Clear all syntax items
-" For version 6.x: Quit when a syntax file was already loaded
-if version < 600
-  syntax clear
-elseif exists("b:current_syntax")
+" quit when a syntax file was already loaded
+if exists("b:current_syntax")
   finish
 endif
 
@@ -67,16 +64,8 @@
   let main_syntax = 'php'
 endif
 
-if version < 600
-  unlet! php_folding
-  if exists("php_sync_method") && !php_sync_method
-    let php_sync_method=-1
-  endif
-  so <sfile>:p:h/html.vim
-else
-  runtime! syntax/html.vim
-  unlet b:current_syntax
-endif
+runtime! syntax/html.vim
+unlet b:current_syntax
 
 " accept old options
 if !exists("php_sync_method")
@@ -94,11 +83,7 @@
 
 syn cluster htmlPreproc add=phpRegion,phpRegionAsp,phpRegionSc
 
-if version < 600
-  syn include @sqlTop <sfile>:p:h/sql.vim
-else
-  syn include @sqlTop syntax/sql.vim
-endif
+syn include @sqlTop syntax/sql.vim
 syn sync clear
 unlet b:current_syntax
 syn cluster sqlTop remove=sqlString,sqlComment
@@ -381,15 +366,8 @@
 else
   syn region  phpComment  start="/\*" end="\*/" contained contains=phpTodo,@Spell extend
 endif
-if version >= 600
-  syn match phpComment  "#.\{-}\(?>\|$\)\@="  contained contains=phpTodo,@Spell
-  syn match phpComment  "//.\{-}\(?>\|$\)\@=" contained contains=phpTodo,@Spell
-else
-  syn match phpComment  "#.\{-}$" contained contains=phpTodo,@Spell
-  syn match phpComment  "#.\{-}?>"me=e-2  contained contains=phpTodo,@Spell
-  syn match phpComment  "//.\{-}$"  contained contains=phpTodo,@Spell
-  syn match phpComment  "//.\{-}?>"me=e-2 contained contains=phpTodo,@Spell
-endif
+syn match phpComment  "#.\{-}\(?>\|$\)\@="  contained contains=phpTodo,@Spell
+syn match phpComment  "//.\{-}\(?>\|$\)\@=" contained contains=phpTodo,@Spell
 
 " String
 if exists("php_parent_error_open")
@@ -403,24 +381,22 @@
 endif
 
 " HereDoc and NowDoc
-if version >= 600
-  syn case match
+syn case match
 
-  " HereDoc
-  syn region  phpHereDoc  matchgroup=Delimiter start="\(<<<\)\@<=\(\"\=\)\z(\I\i*\)\2$" end="^\z1\(;\=$\)\@=" contained contains=phpIdentifier,phpIdentifierSimply,phpIdentifierComplex,phpBackslashSequences,phpMethodsVar,@Spell keepend extend
+" HereDoc
+syn region  phpHereDoc  matchgroup=Delimiter start="\(<<<\)\@<=\(\"\=\)\z(\I\i*\)\2$" end="^\z1\(;\=$\)\@=" contained contains=phpIdentifier,phpIdentifierSimply,phpIdentifierComplex,phpBackslashSequences,phpMethodsVar,@Spell keepend extend
 " including HTML,JavaScript,SQL even if not enabled via options
-  syn region  phpHereDoc  matchgroup=Delimiter start="\(<<<\)\@<=\(\"\=\)\z(\(\I\i*\)\=\(html\)\c\(\i*\)\)\2$" end="^\z1\(;\=$\)\@="  contained contains=@htmlTop,phpIdentifier,phpIdentifierSimply,phpIdentifierComplex,phpBackslashSequences,phpMethodsVar,@Spell keepend extend
-  syn region  phpHereDoc  matchgroup=Delimiter start="\(<<<\)\@<=\(\"\=\)\z(\(\I\i*\)\=\(sql\)\c\(\i*\)\)\2$" end="^\z1\(;\=$\)\@=" contained contains=@sqlTop,phpIdentifier,phpIdentifierSimply,phpIdentifierComplex,phpBackslashSequences,phpMethodsVar,@Spell keepend extend
-  syn region  phpHereDoc  matchgroup=Delimiter start="\(<<<\)\@<=\(\"\=\)\z(\(\I\i*\)\=\(javascript\)\c\(\i*\)\)\2$" end="^\z1\(;\=$\)\@="  contained contains=@htmlJavascript,phpIdentifierSimply,phpIdentifier,phpIdentifierComplex,phpBackslashSequences,phpMethodsVar,@Spell keepend extend
+syn region  phpHereDoc  matchgroup=Delimiter start="\(<<<\)\@<=\(\"\=\)\z(\(\I\i*\)\=\(html\)\c\(\i*\)\)\2$" end="^\z1\(;\=$\)\@="  contained contains=@htmlTop,phpIdentifier,phpIdentifierSimply,phpIdentifierComplex,phpBackslashSequences,phpMethodsVar,@Spell keepend extend
+syn region  phpHereDoc  matchgroup=Delimiter start="\(<<<\)\@<=\(\"\=\)\z(\(\I\i*\)\=\(sql\)\c\(\i*\)\)\2$" end="^\z1\(;\=$\)\@=" contained contains=@sqlTop,phpIdentifier,phpIdentifierSimply,phpIdentifierComplex,phpBackslashSequences,phpMethodsVar,@Spell keepend extend
+syn region  phpHereDoc  matchgroup=Delimiter start="\(<<<\)\@<=\(\"\=\)\z(\(\I\i*\)\=\(javascript\)\c\(\i*\)\)\2$" end="^\z1\(;\=$\)\@="  contained contains=@htmlJavascript,phpIdentifierSimply,phpIdentifier,phpIdentifierComplex,phpBackslashSequences,phpMethodsVar,@Spell keepend extend
 
-  " NowDoc
-  syn region  phpNowDoc  matchgroup=Delimiter start="\(<<<\)\@<='\z(\I\i*\)'$" end="^\z1\(;\=$\)\@=" contained contains=@Spell keepend extend
+" NowDoc
+syn region  phpNowDoc  matchgroup=Delimiter start="\(<<<\)\@<='\z(\I\i*\)'$" end="^\z1\(;\=$\)\@=" contained contains=@Spell keepend extend
 " including HTML,JavaScript,SQL even if not enabled via options
-  syn region  phpNowDoc  matchgroup=Delimiter start="\(<<<\)\@<='\z(\(\I\i*\)\=\(html\)\c\(\i*\)\)'$" end="^\z1\(;\=$\)\@="  contained contains=@htmlTop,@Spell keepend extend
-  syn region  phpNowDoc  matchgroup=Delimiter start="\(<<<\)\@<='\z(\(\I\i*\)\=\(sql\)\c\(\i*\)\)'$" end="^\z1\(;\=$\)\@=" contained contains=@sqlTop,@Spell keepend extend
-  syn region  phpNowDoc  matchgroup=Delimiter start="\(<<<\)\@<='\z(\(\I\i*\)\=\(javascript\)\c\(\i*\)\)'$" end="^\z1\(;\=$\)\@="  contained contains=@htmlJavascript,@Spell keepend extend
-  syn case ignore
-endif
+syn region  phpNowDoc  matchgroup=Delimiter start="\(<<<\)\@<='\z(\(\I\i*\)\=\(html\)\c\(\i*\)\)'$" end="^\z1\(;\=$\)\@="  contained contains=@htmlTop,@Spell keepend extend
+syn region  phpNowDoc  matchgroup=Delimiter start="\(<<<\)\@<='\z(\(\I\i*\)\=\(sql\)\c\(\i*\)\)'$" end="^\z1\(;\=$\)\@=" contained contains=@sqlTop,@Spell keepend extend
+syn region  phpNowDoc  matchgroup=Delimiter start="\(<<<\)\@<='\z(\(\I\i*\)\=\(javascript\)\c\(\i*\)\)'$" end="^\z1\(;\=$\)\@="  contained contains=@htmlJavascript,@Spell keepend extend
+syn case ignore
 
 " Parent
 if exists("php_parent_error_close") || exists("php_parent_error_open")
@@ -621,82 +597,74 @@
 syntax match  phpDocTodo  "@\(todo\|fixme\|xxx\)\(\s\+\)\?" containedin=phpComment
 
 " Define the default highlighting.
-" For version 5.7 and earlier: only when not done already
-" For version 5.8 and later: only when an item doesn't have highlighting yet
-if version >= 508 || !exists("did_php_syn_inits")
-  if version < 508
-    let did_php_syn_inits = 1
-    command -nargs=+ HiLink hi link <args>
-  else
-    command -nargs=+ HiLink hi def link <args>
-  endif
+" Only when an item doesn't have highlighting yet
+command -nargs=+ HiLink hi def link <args>
 
-  HiLink   phpConstant  Constant
-  HiLink   phpCoreConstant  Constant
-  HiLink   phpComment Comment
-  HiLink   phpDocTags PreProc
-  HiLink   phpDocCustomTags Type
-  HiLink   phpException Exception
-  HiLink   phpBoolean Boolean
-  HiLink   phpStorageClass  StorageClass
-  HiLink   phpSCKeyword StorageClass
-  HiLink   phpFCKeyword Define
-  HiLink   phpStructure Structure
-  HiLink   phpStringSingle  String
-  HiLink   phpStringDouble  String
-  HiLink   phpBacktick  String
-  HiLink   phpNumber  Number
-  HiLink   phpFloat Float
-  HiLink   phpMethods Function
-  HiLink   phpFunctions Function
-  HiLink   phpBaselib Function
-  HiLink   phpRepeat  Repeat
-  HiLink   phpConditional Conditional
-  HiLink   phpLabel Label
-  HiLink   phpStatement Statement
-  HiLink   phpKeyword Statement
-  HiLink   phpType  Type
-  HiLink   phpInclude Include
-  HiLink   phpDefine  Define
-  HiLink   phpBackslashSequences SpecialChar
-  HiLink   phpBackslashDoubleQuote SpecialChar
-  HiLink   phpBackslashSingleQuote SpecialChar
-  HiLink   phpParent  Delimiter
-  HiLink   phpBrackets  Delimiter
-  HiLink   phpIdentifierConst Delimiter
-  HiLink   phpParentError Error
-  HiLink   phpOctalError  Error
-  HiLink   phpInterpSimpleError Error
-  HiLink   phpInterpBogusDollarCurley Error
-  HiLink   phpInterpDollarCurly1 Error
-  HiLink   phpInterpDollarCurly2 Error
-  HiLink   phpInterpSimpleBracketsInner String
-  HiLink   phpInterpSimpleCurly Delimiter
-  HiLink   phpInterpVarname Identifier
-  HiLink   phpTodo  Todo
-  HiLink   phpDocTodo Todo
-  HiLink   phpMemberSelector  Structure
-  if exists("php_oldStyle")
-  hi  phpIntVar guifg=Red ctermfg=DarkRed
-  hi  phpEnvVar guifg=Red ctermfg=DarkRed
-  hi  phpOperator guifg=SeaGreen ctermfg=DarkGreen
-  hi  phpVarSelector guifg=SeaGreen ctermfg=DarkGreen
-  hi  phpRelation guifg=SeaGreen ctermfg=DarkGreen
-  hi  phpIdentifier guifg=DarkGray ctermfg=Brown
-  hi  phpIdentifierSimply guifg=DarkGray ctermfg=Brown
-  else
-  HiLink   phpIntVar Identifier
-  HiLink   phpEnvVar Identifier
-  HiLink   phpOperator Operator
-  HiLink   phpVarSelector  Operator
-  HiLink   phpRelation Operator
-  HiLink   phpIdentifier Identifier
-  HiLink   phpIdentifierSimply Identifier
-  endif
-
-  delcommand HiLink
+HiLink   phpConstant  Constant
+HiLink   phpCoreConstant  Constant
+HiLink   phpComment Comment
+HiLink   phpDocTags PreProc
+HiLink   phpDocCustomTags Type
+HiLink   phpException Exception
+HiLink   phpBoolean Boolean
+HiLink   phpStorageClass  StorageClass
+HiLink   phpSCKeyword StorageClass
+HiLink   phpFCKeyword Define
+HiLink   phpStructure Structure
+HiLink   phpStringSingle  String
+HiLink   phpStringDouble  String
+HiLink   phpBacktick  String
+HiLink   phpNumber  Number
+HiLink   phpFloat Float
+HiLink   phpMethods Function
+HiLink   phpFunctions Function
+HiLink   phpBaselib Function
+HiLink   phpRepeat  Repeat
+HiLink   phpConditional Conditional
+HiLink   phpLabel Label
+HiLink   phpStatement Statement
+HiLink   phpKeyword Statement
+HiLink   phpType  Type
+HiLink   phpInclude Include
+HiLink   phpDefine  Define
+HiLink   phpBackslashSequences SpecialChar
+HiLink   phpBackslashDoubleQuote SpecialChar
+HiLink   phpBackslashSingleQuote SpecialChar
+HiLink   phpParent  Delimiter
+HiLink   phpBrackets  Delimiter
+HiLink   phpIdentifierConst Delimiter
+HiLink   phpParentError Error
+HiLink   phpOctalError  Error
+HiLink   phpInterpSimpleError Error
+HiLink   phpInterpBogusDollarCurley Error
+HiLink   phpInterpDollarCurly1 Error
+HiLink   phpInterpDollarCurly2 Error
+HiLink   phpInterpSimpleBracketsInner String
+HiLink   phpInterpSimpleCurly Delimiter
+HiLink   phpInterpVarname Identifier
+HiLink   phpTodo  Todo
+HiLink   phpDocTodo Todo
+HiLink   phpMemberSelector  Structure
+if exists("php_oldStyle")
+hi  phpIntVar guifg=Red ctermfg=DarkRed
+hi  phpEnvVar guifg=Red ctermfg=DarkRed
+hi  phpOperator guifg=SeaGreen ctermfg=DarkGreen
+hi  phpVarSelector guifg=SeaGreen ctermfg=DarkGreen
+hi  phpRelation guifg=SeaGreen ctermfg=DarkGreen
+hi  phpIdentifier guifg=DarkGray ctermfg=Brown
+hi  phpIdentifierSimply guifg=DarkGray ctermfg=Brown
+else
+HiLink   phpIntVar Identifier
+HiLink   phpEnvVar Identifier
+HiLink   phpOperator Operator
+HiLink   phpVarSelector  Operator
+HiLink   phpRelation Operator
+HiLink   phpIdentifier Identifier
+HiLink   phpIdentifierSimply Identifier
 endif
 
+delcommand HiLink
+
 let b:current_syntax = "php"
 
 if main_syntax == 'php'