# filters/StripWhitespace.php

## \StripWhitespace
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Package: phing\filters

Strips whitespace from [php] files using PHP stripwhitespace() method.

Implements
  \ChainableReader
Parent(s)
  \BaseFilterReader < \FilterReader < \Reader
See
  \FilterReader
Author
  Hans Lellelid, hans@velum.net
Todo
  -c use new PHP functions to perform this instead of regex.
Version
  $Revision: 552 $ $Date: 2009-08-29 14:18:13 +0200 (Sat, 29 Aug 2009) $

### Properties

`\Reader $in= ''`
inherited

Inherited from: \FilterReader::$in
Details

Type
  \Reader
Inherited_from
  \FilterReader::$in

`$initialized= 'false'`
inherited

Have the parameters passed been interpreted?

Inherited from: \BaseFilterReader::$initialized
Default value `false` Details

Type
Inherited_from
  \BaseFilterReader::$initialized

`$processed= 'false'`
Default value `false` Details

Type

`$project= 'null'`
inherited

The Phing project this filter is part of.

Inherited from: \BaseFilterReader::$project
Default value `null` Details

Type
Inherited_from
  \BaseFilterReader::$project

### Methods

`__construct( \Reader $in = null ) : void`
inherited

Constructor used by Phing's introspection mechanism.

Inherited from: \BaseFilterReader::__construct()

The original filter reader is only used for chaining purposes, never for filtering purposes (and indeed it would be useless for filtering purposes, as it has no real data to filter). ChainedReaderHelper uses this placeholder instance to create a chain of real filters.

Parameters

Name | Type | Description
--- | --- | ---
$in | \Reader |

`chain( \reader $reader ) : \a`

Creates a new StripWhitespace using the passed in Reader for instantiation.

Parameters

Name | Type | Description
--- | --- | ---
$reader | \reader | A Reader object providing the underlying stream. Must not be `null`.

Returns

Type | Description
--- | ---
\a | new filter based on this configuration, but filtering the specified reader

`close( ) : void`
inherited

Close stream.

Inherited from: \FilterReader::close()
Throws

Exception | Description
--- | ---
\IOException | if there is an error closing stream

`eof( ) : boolean`
inherited

Returns whether the end of file has been reached with input stream.

Inherited from: \BaseFilterReader::eof()
Returns

Type | Description
--- | ---
boolean |

`getInitialized( ) : boolean`
inherited

Returns the initialized status.

Inherited from: \BaseFilterReader::getInitialized()
Returns

Type | Description
--- | ---
boolean | whether or not the filter is initialized

`getProject( ) : object`
inherited

Returns the project this filter is part of.

Inherited from: \BaseFilterReader::getProject()
Returns

Type | Description
--- | ---
object | The project this filter is part of

`getResource( ) : string`
inherited

Returns the filename, url, etc. that is being read from.

Inherited from: \FilterReader::getResource()

This is critical for, e.g., ExpatParser's ability to know the filename that is throwing an ExpatParserException, etc.

Returns

Type | Description
--- | ---
string |

`log( string $msg, int $level = Project::MSG_INFO ) : void`
inherited

Convenience method to support logging in filters.

Inherited from: \BaseFilterReader::log()
Parameters

Name | Type | Description
--- | --- | ---
$msg | string | Message to log.
$level | int | Priority level.

`mark( ) : void`
inherited

If supported, places a "marker" (like a bookmark) at current stream position.

Inherited from: \Reader::mark()

A subsequent call to reset() will move stream position back to last marker (if supported).

`markSupported( ) : boolean`
inherited

Whether marking is supported.

Inherited from: \Reader::markSupported()
Returns

Type | Description
--- | ---
boolean |

`read( \off $len = null ) : \the`

Returns the stream without Php comments and whitespace.

FIXME: Clean up this function signature, as it a) params aren't being used and b) it doesn't make much sense.

Parameters

Name | Type | Description
--- | --- | ---
$len | \off | Offset at which to start storing characters.

Returns

Type | Description
--- | ---
\the | resulting stream, or -1 if the end of the resulting stream has been reached

Throws

Exception | Description
--- | ---
\IOException | if the underlying stream throws an IOException during reading

`readLine( ) : \the`
inherited

Reads a line of text ending with '\n' (or until the end of the stream).

Inherited from: \BaseFilterReader::readLine()

The returned String retains the '\n'.

Returns

Type | Description
--- | ---
\the | line read, or <code>null</code> if the end of the stream has already been reached

Throws

Exception | Description
--- | ---
\IOException | if the underlying reader throws one during reading

`ready( ) : boolean`
inherited

Is stream ready for reading.

Inherited from: \Reader::ready()
Returns

Type | Description
--- | ---
boolean |

`reset( ) : void`
inherited

Reset the current position in stream to beginning or last mark (if supported).

Inherited from: \FilterReader::reset()
`setInitialized( boolean $initialized ) : void`
inherited

Sets the initialized status.

Inherited from: \BaseFilterReader::setInitialized()
Parameters

Name | Type | Description
--- | --- | ---
$initialized | boolean | Whether or not the filter is initialized.

`setProject( object $project ) : void`
inherited

Sets the project to work with.

Inherited from: \BaseFilterReader::setProject()
Parameters

Name | Type | Description
--- | --- | ---
$project | object | The project this filter is part of. Should not be `null`.

`setReader( $in ) : void`
inherited

Inherited from: \FilterReader::setReader()
Parameters

Name | Type | Description
--- | --- | ---
$in |  |

`skip( int $n ) : void`
inherited

Move stream position relative to current pos.

Inherited from: \FilterReader::skip()
Parameters

Name | Type | Description
--- | --- | ---
$n | int |

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