PHP_CodeSniffer (phpcs-fixer branch) run over ZF2. Shows all existing errors (warnings are muted) and which ones can be fixed automatically using phpcbf (docs: https://github.com/squizlabs/PHP_CodeSniffer/wiki/Fixing-Errors-Automatically)

gistfile1.txt

$ php scripts/phpcs ../zf2/library/Zend/ --standard=PSR2 -p --report=source -ns

PHP CODE SNIFFER VIOLATION SOURCE SUMMARY
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    SOURCE                                                                 COUNT
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[x] PSR2.Methods.FunctionCallSignature.Indent                              328
[ ] PSR2.Methods.FunctionCallSignature.MultipleArguments                   276
[x] PSR2.Methods.FunctionCallSignature.CloseBracketLine                    248
[x] Squiz.WhiteSpace.ScopeClosingBrace.ContentBefore                       230
[x] PSR2.Methods.FunctionCallSignature.ContentAfterOpenBracket             220
[x] PSR2.Classes.ClassDeclaration.OpenBraceNotAlone                        195
[x] Generic.WhiteSpace.ScopeIndent.Incorrect                               157
[x] PSR2.ControlStructures.SwitchDeclaration.SpaceBeforeColonCASE          85
[ ] Squiz.ControlStructures.ControlSignature                               62
[x] Generic.Functions.FunctionCallArgumentSpacing.TooMuchSpaceAfterComma   60
[x] PSR2.Classes.ClassDeclaration.SpaceBeforeComma                         58
[x] PSR2.Classes.ClassDeclaration.ImplementsLine                           58
[x] PSR2.Classes.ClassDeclaration.ExtendsLine                              56
[ ] PSR2.ControlStructures.SwitchDeclaration.TerminatingComment            49
[ ] Squiz.Functions.MultiLineFunctionDeclaration.OneParamPerLine           46
[x] PSR2.Classes.ClassDeclaration.CloseBraceAfterBody                      41
[x] Generic.ControlStructures.InlineControlStructure.NotAllowed            36
[ ] Squiz.Functions.MultiLineFunctionDeclaration.ContentAfterComma         30
[ ] Generic.NamingConventions.UpperCaseConstantName.ConstantNotUpperCase   25
[x] PSR2.ControlStructures.ControlStructureSpacing.SpacingAfterOpenBrace   24
[ ] Squiz.Functions.MultiLineFunctionDeclaration.NewlineBeforeOpenBrace    24
[ ] Squiz.Functions.MultiLineFunctionDeclaration.Indent                    22
[ ] Squiz.Functions.MultiLineFunctionDeclaration.FirstParamSpacing         22
[x] Generic.Functions.FunctionCallArgumentSpacing.NoSpaceAfterComma        20
[ ] Squiz.Functions.MultiLineFunctionDeclaration.CloseBracketLine          19
[ ] Squiz.Functions.MultiLineFunctionDeclaration.SpaceAfterFunction        17
[ ] Generic.Formatting.DisallowMultipleStatements.SameLine                 15
[x] Generic.PHP.LowerCaseKeyword.Found                                     14
[x] Squiz.WhiteSpace.ScopeClosingBrace.Indent                              11
[x] Squiz.Functions.FunctionDeclarationArgumentSpacing.SpaceBeforeEquals   11
[x] PSR2.ControlStructures.SwitchDeclaration.BreakIndent                   10
[x] Generic.PHP.LowerCaseConstant.Found                                    9
[x] PSR2.Classes.ClassDeclaration.SpaceBeforeName                          7
[x] Squiz.Functions.MultiLineFunctionDeclaration.BraceOnSameLine           7
[ ] PSR1.Methods.CamelCapsMethodName.NotCamelCaps                          7
[x] PSR2.Namespaces.UseDeclaration.SpaceAfterLastUse                       5
[x] PSR2.ControlStructures.SwitchDeclaration.SpaceBeforeColonDEFAULT       4
[x] Squiz.Functions.FunctionDeclarationArgumentSpacing.SpaceAfterDefault   4
[x] Generic.Functions.FunctionCallArgumentSpacing.SpaceBeforeComma         3
[x] Squiz.ControlStructures.ForEachLoopDeclaration.SpaceBeforeClose        3
[x] Squiz.Functions.MultiLineFunctionDeclaration.BraceIndent               2
[x] PSR2.ControlStructures.ControlStructureSpacing.SpaceBeforeCloseBrace   2
[x] Squiz.ControlStructures.ForEachLoopDeclaration.SpacingBeforeArrow      2
[x] Squiz.ControlStructures.ForEachLoopDeclaration.AsNotLower              2
[ ] PEAR.Functions.ValidDefaultValue.NotAtEnd                              2
[ ] PSR2.Methods.FunctionCallSignature.SpaceBeforeOpenBracket              2
[x] Squiz.Functions.FunctionDeclarationArgumentSpacing.NoSpaceBeforeArg    1
[x] Squiz.Functions.FunctionDeclarationArgumentSpacing.SpaceBeforeComma    1
[x] PSR2.ControlStructures.SwitchDeclaration.SpacingAfterCase              1
[x] PSR2.Classes.ClassDeclaration.SpaceBeforeBrace                         1
[x] Squiz.ControlStructures.ForEachLoopDeclaration.NoSpaceBeforeArrow      1
[x] Squiz.ControlStructures.ForEachLoopDeclaration.NoSpaceAfterArrow       1
[x] Squiz.ControlStructures.ForLoopDeclaration.SpacingAfterOpen            1
[x] Squiz.ControlStructures.ForLoopDeclaration.SpacingBeforeClose          1
[ ] Squiz.Functions.FunctionDeclarationArgumentSpacing.SpacingBetween      1
[ ] Squiz.Classes.ValidClassName.NotCamelCaps                              1
[ ] Squiz.Functions.MultiLineFunctionDeclaration.BraceOnNewLine            1
[ ] Squiz.Functions.MultiLineFunctionDeclaration.SpaceBeforeUse            1
[ ] PSR2.Methods.FunctionCallSignature.SpaceAfterOpenBracket               1
[ ] Squiz.Functions.MultiLineFunctionDeclaration.SpaceAfterUse             1
[ ] PSR2.Methods.FunctionCallSignature.SpaceBeforeCloseBracket             1
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A TOTAL OF 2545 SNIFF VIOLATIONS WERE FOUND IN 61 SOURCES
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PHPCBF CAN FIX THE 39 MARKED SOURCES AUTOMATICALLY (1920 VIOLATIONS IN TOTAL)
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Time: 1.05 minutes, Memory: 43.25Mb