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<?php |
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namespace PhpZip\Model\Extra\Fields; |
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/** |
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* Info-ZIP Unicode Path Extra Field (0x7075): |
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* ==========================================. |
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* |
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* Stores the UTF-8 version of the file name field as stored in the |
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* local header and central directory header. (Last Revision 20070912) |
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* |
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* Value Size Description |
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* ----- ---- ----------- |
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* (UPath) 0x7075 Short tag for this extra block type ("up") |
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* TSize Short total data size for this block |
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* Version 1 byte version of this extra field, currently 1 |
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* NameCRC32 4 bytes File Name Field CRC32 Checksum |
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* UnicodeName Variable UTF-8 version of the entry File Name |
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* |
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* Currently Version is set to the number 1. If there is a need |
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* to change this field, the version will be incremented. Changes |
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* may not be backward compatible so this extra field should not be |
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* used if the version is not recognized. |
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* |
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* The NameCRC32 is the standard zip CRC32 checksum of the File Name |
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* field in the header. This is used to verify that the header |
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* File Name field has not changed since the Unicode Path extra field |
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* was created. This can happen if a utility renames the File Name but |
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* does not update the UTF-8 path extra field. If the CRC check fails, |
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* this UTF-8 Path Extra Field should be ignored and the File Name field |
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* in the header should be used instead. |
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* |
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* The UnicodeName is the UTF-8 version of the contents of the File Name |
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* field in the header. As UnicodeName is defined to be UTF-8, no UTF-8 |
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* byte order mark (BOM) is used. The length of this field is determined |
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* by subtracting the size of the previous fields from TSize. If both |
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* the File Name and Comment fields are UTF-8, the new General Purpose |
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* Bit Flag, bit 11 (Language encoding flag (EFS)), can be used to |
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* indicate that both the header File Name and Comment fields are UTF-8 |
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* and, in this case, the Unicode Path and Unicode Comment extra fields |
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* are not needed and should not be created. Note that, for backward |
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* compatibility, bit 11 should only be used if the native character set |
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* of the paths and comments being zipped up are already in UTF-8. It is |
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* expected that the same file name storage method, either general |
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* purpose bit 11 or extra fields, be used in both the Local and Central |
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* Directory Header for a file. |
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* |
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* @see https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT section 4.6.9 |
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*/ |
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class UnicodePathExtraField extends AbstractUnicodeExtraField |
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{ |
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const HEADER_ID = 0x7075; |
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/** |
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* Returns the Header ID (type) of this Extra Field. |
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* The Header ID is an unsigned short integer (two bytes) |
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* which must be constant during the life cycle of this object. |
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* |
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* @return int |
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*/ |
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2 |
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public function getHeaderId() |
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{ |
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return self::HEADER_ID; |
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} |
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/** |
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* @return string |
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*/ |
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public function __toString() |
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{ |
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return sprintf( |
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'0x%04x UnicodePath: "%s"', |
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self::HEADER_ID, |
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$this->getUnicodeValue() |
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); |
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} |
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} |
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Ne-Lexa /
php-zip
