# C.111 Variable
DESCRIPTION OF TASK. The Variable task provides a mutable property to Phing and works much like variable assignment in PHP. This task is similar to the standard Phing Property task, except that THESE PROPERTIES ARE MUTABLE. While this goes against the standard Phing use of properties, occasionally it is useful to be able to change a property value within the build. In general, use of this task is DISCOURAGED, and the standard Phing Property should be used if possible. Having said that, in real life I use this a lot.
Variables can be set individually or loaded from a standard properties file. A 'feature' of variables is that they can override properties, but properties cannot override variables. So if an already established property exists, its value can be reassigned by use of this task.
Table C.145:聽Attributes
NameTypeDescriptionDefaultRequired`name``String`The name of the property to set.NoneYes, unless 'file' is used.`value``String`The value of the property.""No`unset``Boolean`Removes the property from the project as if it had never been set.falseNo`file``String`The name of a standard properties file to load variables from.NoneNo
C.111.1 Example
```
<var name="x" value="6"/>
<echo>x = ${x}</echo> <!-- print: 6 -->
<var name="x" value="12"/>
<echo>x = ${x}</echo> <!-- print: 12 -->
<var name="x" value="6 + ${x}"/>
<echo>x = ${x}</echo> <!-- print: 6 + 12 -->
<var name="str" value="I "/>
<var name="str" value="${str} am "/>
<var name="str" value="${str} a "/>
<var name="str" value="${str} string."/>
<echo>${str}</echo> <!-- print: I am a string. -->
<var name="x" value="6"/>
<echo>x = ${x}</echo> <!-- print: 6 -->
<property name="x" value="12"/>
<echo>x = ${x}</echo> <!-- print: 6 (property can't override) -->
<var name="x" value="blue"/>
<tstamp>
<format property="x" pattern="%A"/>
</tstamp>
<echo>Today is ${x}.</echo> <!-- print: Today is blue. -->
<var name="x" value="" unset="true"/>
<tstamp>
<format property="x" pattern="%A"/>
</tstamp>
<echo>Today is ${x}.</echo> <!-- print: Today is Friday. -->
```
- Phing User Guide
- Preface
- 1. About this book
- 1.1. Authors
- 1.2. Copyright
- 1.3. License
- 1.4. DocBook
- 1.4.1. Building the documentation
- 1.4.2. Template for new tasks
- 1.4.3. Customization of the look & feel of the rendered outputs
- 1.4.4. DocBook v5 elements used in the manual and their meaning
- 2. Introduction
- 2.1. What Phing Is
- 2.2. Phing & Binarycloud: History
- 2.3. How Phing Works
- 2.4. Cool, so how can I help?
- 2.4.1. Participating in the development
- 3. Setting-up Phing
- 3.1. System Requirements
- 3.1.1. Operating Systems
- 3.1.2. Software Dependencies
- 3.2. Obtaining Phing
- 3.2.1. Distribution Files
- 3.2.2. Getting the latest source from Phing Git repository
- 3.3. Composer Install
- 3.4. Phar package
- 3.5. Running Phing
- 3.5.1. Command Line
- 3.5.2. Supported command line arguments
- 4. Getting started
- 4.1. XML And Phing
- 4.2. Writing A Simple Buildfile
- 4.2.1. Project Element
- 4.2.2. Target Element
- 4.2.2.1. Target attributes
- 4.2.3. Task Elements
- 4.2.4. Property Element
- 4.2.4.1. Built-in Properties
- 4.3. More Complex Buildfile
- 4.3.1. Handling source dependencies
- 4.4. Relax NG Grammar
- 5. Project components
- 5.1. Projects
- 5.2. Version
- 5.3. Project Components in General
- 5.4. Targets
- 5.5. Tasks
- 5.6. Types
- 5.6.1. Basics
- 5.6.2. Referencing Types
- 5.7. Basic Types
- 5.7.1. FileSet
- 5.7.2. FileList
- 5.7.3. FilterChains and Filters
- 5.7.4. File Mappers
- 5.8. Conditions
- 5.8.1. not
- 5.8.2. and
- 5.8.3. or
- 5.8.4. xor
- 5.8.5. os
- 5.8.6. equals
- 5.8.7. versioncompare
- 5.8.8. http
- 5.8.9. socket
- 5.8.10. hasfreespace
- 5.8.11. isset
- 5.8.12. contains
- 5.8.13. istrue
- 5.8.14. isfalse
- 5.8.15. ispropertytrue
- 5.8.16. ispropertyfalse
- 5.8.17. referenceexists
- 5.8.18. available
- 5.8.19. filesmatch
- 5.8.20. isfileselected
- 5.8.21. isfailure
- 5.8.22. matches
- 6. Extending Phing
- 6.1. Extension Possibilities
- 6.1.1. Tasks
- 6.1.2. Types
- 6.1.3. Mappers
- 6.2. Source Layout
- 6.2.1. Files And Directories
- 6.2.2. File Naming Conventions
- 6.2.3. Coding Standards
- 6.3. System Initialization
- 6.3.1. Wrapper Scripts
- 6.3.2. The Main Application (phing.php)
- 6.3.3. The Phing Class
- 6.4. System Services
- 6.4.1. The Exception system
- 6.5. Build Lifecycle
- 6.5.1. How Phing Parses Buildfiles
- 6.6. Writing Tasks
- 6.6.1. Creating A Task
- 6.6.2. Using the Task
- 6.6.3. Source Discussion
- 6.6.4. Task Structure
- 6.6.5. Includes
- 6.6.6. Class Declaration
- 6.6.7. Class Properties
- 6.6.8. The Constructor
- 6.6.9. Setter Methods
- 6.6.10. Creator Methods
- 6.6.11. init() Method
- 6.6.12. main() Method
- 6.6.13. Arbitrary Methods
- 6.7. Writing Types
- 6.7.1. Creating a DataType
- 6.7.2. Using the DataType
- 6.7.3. Source Discussion
- 6.7.3.1. Getters & Setters
- 6.7.3.2. The getRef() Method
- 6.8. Writing Mappers
- 6.8.1. Creating a Mapper
- 6.8.2. Using the Mapper
- A. Fact Sheet
- A.1. Built-In Properties
- A.2. Command Line Arguments
- A.3. Distribution File Layout
- A.4. Program Exit Codes
- A.5. The LGPL License
- A.6. The GFDL License
- B. Core tasks
- B.1. AdhocTaskdefTask
- B.1.1. Examples
- B.2. AdhocTypedefTask
- B.2.1. Example
- B.3. AppendTask
- B.3.1. Examples
- B.3.2. Supported Nested Tags
- B.4. ApplyTask
- B.4.1. Examples
- B.4.2. Supported Nested Tags
- B.5. AttribTask
- B.5.1. Example
- B.5.2. Supported Nested Tags
- B.6. AvailableTask
- B.6.1. Examples
- B.7. Basename
- B.7.1. Examples
- B.8. ChmodTask
- B.8.1. Examples
- B.8.2. Supported Nested Tags
- B.9. ChownTask
- B.9.1. Examples
- B.9.2. Supported Nested Tags
- B.10. ConditionTask
- B.10.1. Examples
- B.10.2. Supported Nested Tags
- B.11. CopyTask
- B.11.1. Examples
- B.11.2. Supported Nested Tags
- B.12. DefaultExcludes
- B.12.1. Examples
- B.13. DeleteTask
- B.13.1. Examples
- B.13.2. Supported Nested Tags
- B.14. DependSet
- B.14.1. Examples
- B.14.2. Supported Nested Tags
- B.15. Diagnostics
- B.15.1. Example
- B.16. Dirname
- B.16.1. Example
- B.17. EchoTask
- B.17.1. Examples
- B.17.2. Supported Nested Tags
- B.18. EchoPropertiesTask
- B.18.1. Example
- B.19. ExecTask
- B.19.1. Examples
- B.19.2. Supported Nested Tags
- B.20. FailTask
- B.20.1. Examples
- B.20.2. Parameters specified as nested elements.
- B.21. ForeachTask
- B.21.1. Examples
- B.21.2. Supported Nested Tags
- B.22. IfTask
- B.22.1. Examples
- B.23. ImportTask
- B.23.1. Target Overriding
- B.23.2. Special Properties
- B.23.3. Resolving Files Against the Imported File
- B.23.4. Examples
- B.24. IncludePathTask
- B.24.1. Examples
- B.25. InputTask
- B.25.1. Examples
- B.26. LoadFileTask
- B.26.1. Examples
- B.26.2. Supported Nested Tags:
- B.27. MkdirTask
- B.27.1. Examples
- B.28. MoveTask
- B.28.1. Examples
- B.28.2. Attributes and Nested Elements
- B.29. PathConvert
- B.30. PhingTask
- B.30.1. Examples
- B.30.2. Supported Nested Tags
- B.30.3. Base directory of the new project
- B.31. PhingCallTask
- B.31.1. Examples
- B.31.2. Supported Nested Tags
- B.32. Phingversion
- B.32.1. Example
- B.33. PhpEvalTask
- B.33.1. Examples
- B.33.2. Supported Nested Tags
- B.34. PropertyTask
- B.34.1. Examples
- B.34.2. Supported Nested Tags:
- B.35. PropertyPromptTask
- B.35.1. Examples
- B.36. Record
- B.36.1. Example
- B.37. ReflexiveTask
- B.37.1. Examples
- B.37.2. Supported Nested Tags:
- B.38. ResolvePathTask
- B.38.1. Examples
- B.39. Retry
- B.39.1. Example
- B.40. RunTargetTask
- B.40.1. Example
- B.41. SleepTask
- B.41.1. Example
- B.42. SwitchTask
- B.42.1. Supported Nested Tags
- B.42.2. Examples
- B.43. TaskdefTask
- B.43.1. Examples
- B.43.2. Supported Nested Tags
- B.44. Tempfile Task
- B.44.1. Example
- B.45. TouchTask
- B.45.1. Examples
- B.45.2. Supported Nested Tags
- B.46. TruncateTask
- B.46.1. Examples
- B.47. TryCatchTask
- B.47.1. Examples
- B.48. TstampTask
- B.48.1. Examples
- B.48.2. Supported Nested Tags
- B.49. TypedefTask
- B.49.1. Examples
- B.49.2. Supported Nested Tags
- B.50. UpToDateTask
- B.50.1. Examples
- B.50.2. Supported Nested Tags
- B.51. WaitForTask
- B.51.1. Examples
- B.51.2. Supported Nested Tags
- B.52. XsltTask
- B.52.1. Examples
- B.52.2. Supported Nested Tags
- C. Optional tasks
- C.1. ApiGenTask
- C.1.1. Example
- C.2. AutoloaderTask
- C.2.1. Example
- C.3. ComposerTask
- C.3.1. Supported Nested Tags
- C.4. CoverageMergerTask
- C.4.1. Example
- C.4.2. Supported Nested Tags
- C.5. CoverageReportTask
- C.5.1. Example
- C.5.2. Supported Nested Tags
- C.6. CoverageSetupTask
- C.6.1. Example
- C.6.2. Supported Nested Tags
- C.7. CoverageThresholdTask
- C.7.1. Example
- C.7.2. Supported Nested Tags
- C.8. DbDeployTask
- C.8.1. Example
- C.9. ExportPropertiesTask
- C.9.1. Example
- C.10. FileHashTask
- C.10.1. Example
- C.11. FileSizeTask
- C.11.1. Example
- C.12. FileSyncTask
- C.12.1. Examples
- C.13. FtpDeployTask
- C.13.1. Example
- C.13.2. Supported Nested Tags
- C.14. GitArchiveTask
- C.14.1. Example
- C.15. GitBranchTask
- C.15.1. Example
- C.16. GitCheckoutTask
- C.16.1. Example
- C.17. GitCloneTask
- C.17.1. Example
- C.18. GitCommitTask
- C.18.1. Example
- C.18.2. Supported Nested Tags
- C.19. GitFetchTask
- C.19.1. Example
- C.20. GitGcTask
- C.20.1. Example
- C.21. GitInitTask
- C.21.1. Example
- C.22. GitLogTask
- C.22.1. Example
- C.23. GitMergeTask
- C.23.1. Example
- C.24. GitPullTask
- C.24.1. Example
- C.25. GitPushTask
- C.25.1. Example
- C.26. GitTagTask
- C.26.1. Example
- C.27. GitDescribeTask
- C.27.1. Example
- C.28. GrowlNotifyTask
- C.28.1. Examples
- C.29. HgAddTask
- C.29.1. Example
- C.29.2. Supported Nested Tags
- C.30. HgArchiveTask
- C.30.1. Example
- C.31. HgCloneTask
- C.31.1. Example
- C.32. HgCommitTask
- C.32.1. Example
- C.33. HgInitTask
- C.33.1. Example
- C.34. HgLogTask
- C.34.1. Example
- C.35. HgPullTask
- C.35.1. Example
- C.36. HgPushTask
- C.36.1. Example
- C.37. HgRevertTask
- C.37.1. Example
- C.38. HgTagTask
- C.38.1. Example
- C.39. HgUpdateTask
- C.39.1. Example
- C.40. HipchatTask
- C.40.1. Example
- C.41. HttpGetTask
- C.41.1. Example
- C.41.2. Supported Nested Tags
- C.41.3. Global configuration
- C.42. HttpRequestTask
- C.42.1. Example
- C.42.2. Supported Nested Tags
- C.42.3. Global configuration
- C.43. IniFileTask
- C.43.1. Supported Nested Tags
- C.43.2. Example
- C.44. IoncubeEncoderTask
- C.44.1. Example
- C.44.2. Supported Nested Tags
- C.45. IoncubeLicenseTask
- C.45.1. Example
- C.45.2. Supported Nested Tags
- C.46. JsHintTask
- C.46.1. Example
- C.46.2. Supported Nested Tags
- C.47. JslLintTask
- C.47.1. Example
- C.47.2. Supported Nested Tags
- C.48. JsMinTask
- C.48.1. Example
- C.48.2. Supported Nested Tags
- C.49. JsonValidateTask
- C.49.1. Example
- C.50. LiquibaseTask
- C.50.1. Example
- C.50.2. Supported Nested Tags
- C.51. LiquibaseChangeLogTask
- C.51.1. Example
- C.51.2. Supported Nested Tags
- C.52. LiquibaseDbDocTask
- C.52.1. Example
- C.52.2. Supported Nested Tags
- C.53. LiquibaseDiffTask
- C.53.1. Example
- C.53.2. Supported Nested Tags
- C.54. LiquibaseRollbackTask
- C.54.1. Example
- C.54.2. Supported Nested Tags
- C.55. LiquibaseTagTask
- C.55.1. Example
- C.55.2. Supported Nested Tags
- C.56. LiquibaseUpdateTask
- C.56.1. Example
- C.56.2. Supported Nested Tags
- C.57. MailTask
- C.57.1. Example
- C.57.2. Supported Nested Tags
- C.58. ManifestTask
- C.58.1. Supported Nested Tags
- C.59. NotifySendTask
- C.60. PackageAsPathTask
- C.60.1. Example
- C.61. ParallelTask
- C.61.1. Example
- C.62. PatchTask
- C.62.1. Example
- C.63. PathToFileSetTask
- C.63.1. Examples
- C.64. PDOSQLExecTask
- C.64.1. Example
- C.64.2. Supported Nested Tags
- C.65. PearPackageTask
- C.65.1. Example
- C.65.2. Supported Nested Tags
- C.66. PearPackage2Task
- C.66.1. Example
- C.66.2. Supported Nested Tags
- C.67. PharDataTask
- C.67.1. Example
- C.67.2. Supported Nested Tags
- C.68. PharPackageTask
- C.68.1. Example
- C.68.2. Supported Nested Tags
- C.69. PhkPackageTask
- C.69.1. Example
- C.69.2. Supported Nested Tags
- C.70. PhpCodeSnifferTask
- C.70.1. Examples
- C.70.2. Supported Nested Tags
- C.71. PHPCPDTask
- C.71.1. Examples
- C.71.2. Supported Nested Tags
- C.72. PHPLocTask
- C.72.1. Examples
- C.72.2. Supported Nested Tags
- C.73. PHPMDTask
- C.73.1. Example
- C.73.2. Supported Nested Tags
- C.74. PhpDependTask
- C.74.1. Example
- C.74.2. Supported Nested Tags
- C.75. PhpDocumentor2Task
- C.75.1. Example
- C.75.2. Supported Nested Tags
- C.76. PhpLintTask
- C.76.1. Example
- C.76.2. Supported Nested Tags
- C.77. PHPUnitTask
- C.77.1. Supported Nested Tags
- C.77.2. Example
- C.77.3. Supported Nested Tags
- C.78. PHPUnitReport
- C.78.1. Example
- C.79. PropertyCopy
- C.79.1. Example
- C.80. PropertyRegexTask
- C.80.1. Match expressions
- C.80.2. Replace
- C.80.3. Example
- C.81. ReplaceRegexpTask
- C.81.1. Supported Nested Tags
- 1. PropertySelector
- 1.1. Select expressions
- 1.2. Example
- C.82. rSTTask
- C.82.1. Features
- C.82.2. Examples
- C.82.3. Supported Nested Tags
- C.83. S3PutTask
- C.83.1. Example
- C.83.2. Supported Nested Tags
- C.84. S3GetTask
- C.84.1. Example
- C.85. SassTask
- C.85.1. Example
- C.85.2. Supported Nested Tags
- C.86. ScpTask
- C.86.1. Example
- C.86.2. Supported Nested Tags
- C.87. SmartyTask
- C.88. SonarTask
- C.88.1. Examples
- C.88.1.1. Minimal Example
- C.88.1.2. Full Example
- C.88.2. Supported Nested Tags
- C.89. SortList
- C.89.1. Example
- C.90. SshTask
- C.90.1. Example
- C.90.2. Supported Nested Tags
- C.91. SvnCheckoutTask
- C.91.1. Example
- C.92. SvnCommitTask
- C.92.1. Example
- C.93. SvnCopyTask
- C.93.1. Example
- C.94. SvnExportTask
- C.94.1. Example
- C.95. SvnInfoTask
- C.95.1. Example
- C.96. SvnLastRevisionTask
- C.96.1. Example
- C.97. SvnListTask
- C.97.1. Example
- C.98. SvnLogTask
- C.98.1. Example
- C.99. SvnUpdateTask
- C.99.1. Example
- C.100. SvnSwitchTask
- C.100.1. Example
- C.101. SvnProplistTask
- C.101.1. Example
- C.102. SvnPropgetTask
- C.102.1. Example
- C.103. SvnPropsetTask
- C.103.1. Example
- C.104. StopwatchTask
- C.104.1. Example
- C.105. SymfonyConsoleTask
- C.105.1. Examples
- C.105.2. Supported Nested Tags
- C.106. SymlinkTask
- C.106.1. Example
- C.106.2. Supported Nested Tags
- C.107. TarTask
- C.107.1. Example
- C.107.2. Supported Nested Tags
- C.108. ThrowTask
- C.108.1. Example
- C.109. UntarTask
- C.109.1. Example
- C.109.2. Supported Nested Tags
- C.110. UnzipTask
- C.110.1. Example
- C.110.2. Supported Nested Tags
- C.111. Variable
- C.111.1. Example
- C.112. VersionTask
- C.112.1. Example
- C.113. WikiPublishTask
- C.113.1. Example
- C.114. XmlLintTask
- C.114.1. Examples
- C.114.2. Supported Nested Tags
- C.115. XmlPropertyTask
- C.115.1. Example
- C.116. ZendCodeAnalyzerTask
- C.116.1. Example
- C.116.2. Supported Nested Tags
- C.117. ZendGuardEncodeTask
- C.117.1. Example
- C.117.2. Supported Nested Tags
- C.118. ZendGuardLicenseTask
- C.118.1. Examples
- C.119. ZipTask
- C.119.1. Example
- C.119.2. Supported Nested Tags
- C.120. ZSDTPackTask
- C.120.1. Example
- C.121. ZSDTValidateTask
- C.121.1. Example
- D. Core Types
- D.1. Description
- D.1.1. Usage Examples
- D.2. Excludes
- D.2.1. Nested tags
- D.2.2. Usage Examples
- D.3. FileList
- D.3.1. Usage Examples
- D.4. FileSet
- D.4.1. Using wildcards
- D.4.2. Usage Examples
- D.4.3. Nested tags
- D.4.4. Related types
- D.5. DirSet
- D.5.1. Using wildcards
- D.5.2. Usage Examples
- D.5.3. Nested tags
- D.5.4. Related types
- D.6. PatternSet
- D.6.1. Usage Example
- D.6.2. Nested tags
- D.7. Path / Classpath
- D.7.1. Nested tags
- D.8. PearPackageFileSet
- D.8.1. Usage Examples
- D.8.2. Nested tags
- E. Core filters
- E.1. PhingFilterReader
- E.1.1. Nested tags
- E.1.2. Advanced
- E.2. ExpandProperties
- E.3. ConcatFilter
- E.4. HeadFilter
- E.5. IconvFilter
- E.6. Line Contains
- E.6.1. Nested tags
- E.7. LineContainsRegexp
- E.7.1. Nested tags
- E.8. PrefixLines
- E.9. ReplaceTokens
- E.9.1. Nested tags
- E.10. ReplaceTokensWithFile
- E.10.1. Nested tags
- E.11. ReplaceRegexp
- E.11.1. Nested tags
- E.12. SortFilter
- E.13. StripLineBreaks
- E.14. StripLineComments
- E.14.1. Nested tags
- E.15. StripPhpComments
- E.16. StripWhitespace
- E.17. TabToSpaces
- E.18. TailFilter
- E.19. TidyFilter
- E.19.1. Nested tags
- E.20. XincludeFilter
- E.21. XsltFilter
- E.21.1. Nested tags
- F. Core mappers
- F.1. Common Attributes
- F.2. ChainedMapper
- F.2.1. Examples
- F.3. CompositeMapper
- F.3.1. Examples
- F.4. FirstMatchMapper
- F.4.1. Examples
- F.5. CutDirsMapper
- F.5.1. Examples
- F.6. FlattenMapper
- F.6.1. Examples
- F.7. GlobMapper
- F.7.1. Examples
- F.8. IdentityMapper
- F.9. MergeMapper
- F.9.1. Examples
- F.10. RegexpMapper
- F.10.1. Examples
- G. Core selectors
- G.1. Contains
- G.2. Date
- G.3. Depend
- G.4. Depth
- G.5. Different
- G.6. Filename
- G.7. Present
- G.8. Containsregexp
- G.9. Size
- G.10. Type
- G.11. And
- G.12. Majority
- G.13. None
- G.14. Not
- G.15. Or
- G.16. Readable
- G.17. Writable
- G.18. Executable
- G.19. Selector
- G.20. Symlink Selector
- H. Project Components
- H.1. Phing Projects
- H.1.1. Example
- H.1.2.
- H.1.3. Attributes
- H.2. Targets
- H.2.1. Example
- H.2.2. Attributes
- I. Loggers and Listeners
- I.1. Listeners
- I.2. Loggers
- I.3. DefaultLogger
- I.4. MailLogger
- I.5. NoBannerLogger
- I.6. ProfileLogger
- I.7. StatisticsListener
- I.8. TimestampedLogger
- J. File Formats
- J.1. Build File Format
- J.2. Property File Format
- Bibliography
- International Standards
- Licenses
- Open Source Projects
- Manuals
- Other Resources