Charset PHP ActiveX Reference Documentation

Charset

Current Version: 10.0.0

A component/class for converting character data from one encoding to another. This software is unique in that the data required for converting to/from the supported charsets is entirely embedded witin the Chilkat DLL/library. It does not depend on what code pages may or may not be installed on a particular computer. This allows programs to operate correctly regardless of the locale, OS version, or other factors.

Object Creation

Chilkat v10.0.0 or greater:
$obj = new COM("Chilkat.Charset");
Chilkat v9.5.0.*:
$obj = new COM("Chilkat_9_5_0.Charset");

Properties

AltToCharset
string AltToCharset

If the ErrorAction property is set to 6, then this property controls how errors are handled. It specifies an alternate "To" charset. When a character in the input data cannot be converted to the target charset, an attempt is made to convert it to the AltToCharset. If that fails, the input character is dropped.

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DebugLogFilePath
string DebugLogFilePath

If set to a file path, causes each Chilkat method or property call to automatically append it's LastErrorText to the specified log file. The information is appended such that if a hang or crash occurs, it is possible to see the context in which the problem occurred, as well as a history of all Chilkat calls up to the point of the problem. The VerboseLogging property can be set to provide more detailed information.

This property is typically used for debugging the rare cases where a Chilkat method call hangs or generates an exception that halts program execution (i.e. crashes). A hang or crash should generally never happen. The typical causes of a hang are:

  1. a timeout related property was set to 0 to explicitly indicate that an infinite timeout is desired,
  2. the hang is actually a hang within an event callback (i.e. it is a hang within the application code), or
  3. there is an internal problem (bug) in the Chilkat code that causes the hang.

More Information and Examples
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ErrorAction
int ErrorAction

Controls how errors are handled. When a character in the input data cannot be converted to the target charset, the action taken is controlled by this property. The possible settings are: (0) drop the error characters, (1) substitute the data set by the SetErrorBytes or SetErrorString method, (2) convert to a hex-escaped string (&#xXXXX), (3) RESERVED, (4) RESERVED, (5) RESERVED, (6) convert the error character to the AltToCharset instead, if that fails then drop the character, (7) Pass non-convertible characters to the output unchanged.

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FromCharset
string FromCharset

Tells the charset converter the charset of the input data for a conversion. Possible values are:

<font size="2" face="MS Sans Serif">
us-ascii
unicode  (also known as UTF16LE or simply UTF16)
unicodefffe  (also known as UTF16BE)
ebcdic
iso-8859-1
iso-8859-2
iso-8859-3
iso-8859-4
iso-8859-5
iso-8859-6
iso-8859-7
iso-8859-8
iso-8859-9
iso-8859-13
iso-8859-15
windows-874
windows-1250
windows-1251
windows-1252
windows-1253
windows-1254
windows-1255
windows-1256
windows-1257
windows-1258
utf-7
utf-8
utf-32
utf-32be
shift_jis
gb2312
ks_c_5601-1987
big5
iso-2022-jp
iso-2022-kr
euc-jp
euc-kr
macintosh
x-mac-japanese
x-mac-chinesetrad
x-mac-korean
x-mac-arabic
x-mac-hebrew
x-mac-greek
x-mac-cyrillic
x-mac-chinesesimp
x-mac-romanian
x-mac-ukrainian
x-mac-thai
x-mac-ce
x-mac-icelandic
x-mac-turkish
x-mac-croatian
asmo-708
dos-720
dos-862
ibm01140
ibm01141
ibm01142
ibm01143
ibm01144
ibm01145
ibm01146
ibm01147
ibm01148
ibm01149
ibm037
ibm437
ibm500
ibm737
ibm775
ibm850
ibm852
ibm855
ibm857
ibm00858
ibm860
ibm861
ibm863
ibm864
ibm865
cp866
ibm869
ibm870
cp875
koi8-r
koi8-u
</font>

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LastBinaryResult
VARIANT LastBinaryResult (read-only)

The binary data returned by the last (binary data returning) method called. Only available if Chilkat.Global.KeepBinaryResult is set to true. This provides a means for obtaining large varbinary results in the SQL Server environment (where limitations exist in getting large amounts of data returned by method calls, but where temp tables can be used for binary properties).

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LastErrorHtml
string LastErrorHtml (read-only)

Provides information in HTML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastErrorText
string LastErrorText (read-only)

Provides information in plain-text format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastErrorXml
string LastErrorXml (read-only)

Provides information in XML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastInputAsHex
string LastInputAsHex (read-only)

If SaveLast is set to true, then the input and output of a conversion is saved to allow the exact bytes that are sent to the converter to be seen (for debugging purposes). This property shows the last input data in a hexidecimalized string.

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LastInputAsQP
string LastInputAsQP (read-only)

If SaveLast is set to true, then the input and output of a conversion is saved to allow the exact bytes that are sent to the converter to be seen (for debugging purposes). This property shows the last input data in a quoted-printable string.

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LastMethodSuccess
bool LastMethodSuccess

Indicate whether the last method call succeeded or failed. A value of true indicates success, a value of false indicates failure. This property is automatically set for method calls. It is not modified by property accesses. The property is automatically set to indicate success for the following types of method calls:

  • Any method that returns a string.
  • Any method returning a Chilkat object, binary bytes, or a date/time.
  • Any method returning a standard boolean status value where success = true and failure = false.
  • Any method returning an integer where failure is defined by a return value less than zero.

Note: Methods that do not fit the above requirements will always set this property equal to true. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

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LastOutputAsHex
string LastOutputAsHex (read-only)

If SaveLast is set to true, then the input and output of a conversion is saved to allow the exact bytes that are sent to the converter to be seen (for debugging purposes). This property shows the last output data in a hexidecimalized string.

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LastOutputAsQP
string LastOutputAsQP (read-only)

If SaveLast is set to true, then the input and output of a conversion is saved to allow the exact bytes that are sent to the converter to be seen (for debugging purposes). This property shows the last output data in a quoted-printable string.

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LastStringResult
string LastStringResult (read-only)

The string return value of the last (string returning) method called. Only available if Chilkat.Global.KeepStringResult is set to true. This provides a means for obtaining large string results in the SQL Server environment (where limitations exist in getting long strings returned by method calls, but where temp tables can be used for string properties).

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LastStringResultLen
int LastStringResultLen (read-only)

The length, in characters, of the string contained in the LastStringResult property.

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SaveLast
bool SaveLast

Tells the component to keep the input/output byte data in memory after a conversion is complete so the data can be examined via the LastInputAsHex/QP and LastOutputAsHex/QP properties. (for debugging purposes)

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ToCharset
string ToCharset

Tells the charset converter the target charset for a conversion. Possible values are:

<font size="2" face="MS Sans Serif">
us-ascii
unicode  (also known as UTF16LE or simply UTF16)
unicodefffe  (also known as UTF16BE)
ebcdic
iso-8859-1
iso-8859-2
iso-8859-3
iso-8859-4
iso-8859-5
iso-8859-6
iso-8859-7
iso-8859-8
iso-8859-9
iso-8859-13
iso-8859-15
windows-874
windows-1250
windows-1251
windows-1252
windows-1253
windows-1254
windows-1255
windows-1256
windows-1257
windows-1258
utf-7
utf-8
utf-32
utf-32be
shift_jis
gb2312
ks_c_5601-1987
big5
iso-2022-jp
iso-2022-kr
euc-jp
euc-kr
macintosh
x-mac-japanese
x-mac-chinesetrad
x-mac-korean
x-mac-arabic
x-mac-hebrew
x-mac-greek
x-mac-cyrillic
x-mac-chinesesimp
x-mac-romanian
x-mac-ukrainian
x-mac-thai
x-mac-ce
x-mac-icelandic
x-mac-turkish
x-mac-croatian
asmo-708
dos-720
dos-862
ibm01140
ibm01141
ibm01142
ibm01143
ibm01144
ibm01145
ibm01146
ibm01147
ibm01148
ibm01149
ibm037
ibm437
ibm500
ibm737
ibm775
ibm850
ibm852
ibm855
ibm857
ibm00858
ibm860
ibm861
ibm863
ibm864
ibm865
cp866
ibm869
ibm870
cp875
koi8-r
koi8-u
</font>

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VerboseLogging
bool VerboseLogging

If set to true, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is false. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.

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Version
string Version (read-only)

Version of the component/library, such as "9.5.0.94"

More Information and Examples
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Methods

CharsetToCodePage
int CharsetToCodePage(string charsetName)

Converts a charset name to a code page number. For example, "iso-8859-1" converts to code page 28591.

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CodePageToCharset
string CodePageToCharset(int codePage)

Converts a code page number to a charset name. For example, 65001 converts to "utf-8".

Returns null on failure

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ConvertData
VARIANT ConvertData(VARIANT inData)

Converts character data from one charset to another. Before calling ConvertData, the FromCharset and ToCharset properties must be set to the source and destination charset names, such as "iso-8859-1" or "Shift_JIS".

Returns null on failure

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ConvertFile
bool ConvertFile(string inPath, string destPath)

Converts a file from one character encoding to another. The FromCharset and ToCharset properties specify the source and destination character encodings. If the ToCharset is utf-16 or utf-8, then the preamble (also known as BOM) is included in the output. (Call ConvertFileNoPreamble to suppress the output of the BOM.)

Returns true for success, false for failure.

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ConvertFileNoPreamble
bool ConvertFileNoPreamble(string inPath, string destPath)

Converts a file from one character encoding to another. The FromCharset and ToCharset properties specify the source and destination character encodings. No preamble (also known as BOM) is included in the output.

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ConvertFromUnicode
VARIANT ConvertFromUnicode(string inData)

Converts Unicode (utf-16) text to the charset specified by the ToCharset property.

Returns null on failure

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ConvertFromUtf16
VARIANT ConvertFromUtf16(VARIANT uniData)

Converts utf-16 text to the charset specified by the ToCharset property.

Returns null on failure

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ConvertHtml
VARIANT ConvertHtml(VARIANT inData)

Converts HTML text from one character encoding to another. The FromCharset and ToCharset properties must be set prior to calling this method. This method automatically edits the META tag within the HTML that indicates the charset.

Returns null on failure

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ConvertHtmlFile
bool ConvertHtmlFile(string inPath, string destPath)

Converts an HTML file from one character encoding to another. The ToCharset properties must be set prior to calling this method. If the FromCharset is not set, it is obtained from the HTML META tag that indicates the charset. This method automatically edits the META tag within the HTML that indicates the charset.

Returns true for success, false for failure.

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ConvertToUnicode
string ConvertToUnicode(VARIANT inData)

Converts multibyte character data to a Unicode string. The FromCharset property should be set before calling this method.

Returns null on failure

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ConvertToUtf16
VARIANT ConvertToUtf16(VARIANT mbData)

Converts the mbData to utf-16 bytes.

Returns null on failure

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EntityEncodeDec
string EntityEncodeDec(string str)

Converts non-US-ASCII characters to Unicode decimal entities (&#xxxxx;)

Returns null on failure

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EntityEncodeHex
string EntityEncodeHex(string str)

Converts non-US-ASCII characters to Unicode hex entities (&#xXXXX;)

Returns null on failure

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GetHtmlCharset
string GetHtmlCharset(VARIANT inData)

Examines HTML text and extracts the charset name specified by the META tag, if present.

Returns null on failure

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GetHtmlFileCharset
string GetHtmlFileCharset(string htmlFilePath)

Examines an HTML file and extracts the charset name specified by the META tag, if present.

Returns null on failure

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HtmlDecodeToStr
string HtmlDecodeToStr(string inStr)

Converts HTML entities to Unicode characters.

Returns null on failure

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HtmlEntityDecode
VARIANT HtmlEntityDecode(VARIANT inHtml)

Decodes HTML entities. See http://www.w3.org/TR/REC-html40/sgml/entities.html for information on HTML entities. Examples of HTML entities are &lt; , &#229; , &#xE5; , &#x6C34; , &Iacute; , etc.

Returns null on failure

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HtmlEntityDecodeFile
bool HtmlEntityDecodeFile(string inPath, string destPath)

Decodes HTML entities in a file and creates a new HTML file with the entities decoded. See http://www.w3.org/TR/REC-html40/sgml/entities.html for information on HTML entities. Examples of HTML entities are &lt; , &#229; , &#xE5; , &#x6C34; , &Iacute; , etc.

Returns true for success, false for failure.

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LowerCase
string LowerCase(string inStr)

Converts a string to lowercase.

Returns null on failure

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ReadFile
VARIANT ReadFile(string path)

Convenience method for reading the entire contents of a file into a byte array.

Returns null on failure

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ReadFileToString
string ReadFileToString(string path, string charset)

Reads a text file and returns the text converted to a Unicode string. The filename is specified by the first method argument, and the charset of the text data is specified by the 2nd method argument.

Returns null on failure

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SetErrorBytes
void SetErrorBytes(VARIANT data)

If the ErrorAction property is set to 1, the bytes passed to this method are used as the result for any characters that cannot be converted during a conversion.

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SetErrorString
void SetErrorString(string str, string charset)

If the ErrorAction property is set to 1, the string passed to this method is used as the result for any characters that cannot be converted during a conversion.

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UpperCase
string UpperCase(string inStr)

Converts a string to uppercase.

Returns null on failure

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UrlDecodeStr
string UrlDecodeStr(string inStr)

URL decodes a string.

This method assumes the ANSI byte representation was used for encoding. For example, the letter É, where the ANSI charset is Latin-1, would appear as "%C9" when URL encoded. (As opposed to the utf-8 encoding where É is represented by 2 bytes 0xC3, 0x89 and would appear as "%C3%89" when URl encoded. This method assumes ANSI encoding.

You can use encoding/decoding methods in Chilkat's StringBuilder class to specify the charset from which to decode or encode.

Returns null on failure

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VerifyData
bool VerifyData(string charset, VARIANT inData)

Returns true if the byte data conforms to the charset passed in the first argument.

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VerifyFile
bool VerifyFile(string charset, string path)

Returns true if the file contains character data that conforms to the charset passed in the 1st argument.

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WriteFile
bool WriteFile(string path, VARIANT byteData)

Convenience method for saving an entire byte array to a file.

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WriteStringToFile
bool WriteStringToFile(string textData, string path, string charset)

Converts a Unicode string to a multibyte charset and writes the multibyte text data to a file. The destination charset is specified in the 2nd method argument.

Returns true for success, false for failure.

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