10-12-2006
Hi ronald_brayan,
When you give a command like: 'tar cvf test.tar *.txt', what happens is that the shell parses the entire input line. It sees that you are supplying a "*.txt" pattern, so it checks in the current directory for that pattern and replaces that pattern with any files that it finds.
So after the shell is done with the parsing, the command that is executed is:
'tar cvf test.tar out.txt'
In the second case your pattern is just "*". So the shell replaces it with all the files and directories in the current directory. So the command that is executed is the same as:
'tar cvf test.tar A B C out.txt'.
The directories A, B and C and the file out.txt are sent in as args to the tar command, and tar includes any files inside directories in the tar archive. If you put in any more files in the A, B or C directories and run the tar with '*' as the arg, you will find that those files are in the tar archive as well.
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LEARN ABOUT PHP
phardata.extractto
PHARDATA.EXTRACTTO(3) 1 PHARDATA.EXTRACTTO(3)
PharData::extractTo - Extract the contents of a tar/zip archive to a directory
SYNOPSIS
bool PharData::extractTo (string $pathto, [string|array $files], [bool $overwrite = false])
DESCRIPTION
Extract all files within a tar/zip archive to disk. Extracted files and directories preserve permissions as stored in the archive. The
optional parameters allow optional control over which files are extracted, and whether existing files on disk can be overwritten. The sec-
ond parameter files can be either the name of a file or directory to extract, or an array of names of files and directories to extract. By
default, this method will not overwrite existing files, the third parameter can be set to true to enable overwriting of files. This method
is similar to ZipArchive.extractTo(3).
PARAMETERS
o $pathto
- Path to extract the given files to
o $files
- The name of a file or directory to extract, or an array of files/directories to extract
o $overwrite
- Set to TRUE to enable overwriting existing files
RETURN VALUES
returns TRUE on success, but it is better to check for thrown exception, and assume success if none is thrown.
ERRORS
/EXCEPTIONS
Throws PharException if errors occur while flushing changes to disk.
EXAMPLES
Example #1
A PharData.extractTo(3) example
<?php
try {
$phar = new PharData('myphar.tar');
$phar->extractTo('/full/path'); // extract all files
$phar->extractTo('/another/path', 'file.txt'); // extract only file.txt
$phar->extractTo('/this/path',
array('file1.txt', 'file2.txt')); // extract 2 files only
$phar->extractTo('/third/path', null, true); // extract all files, and overwrite
} catch (Exception $e) {
// handle errors
}
?>
SEE ALSO
Phar.extractTo(3).
PHP Documentation Group PHARDATA.EXTRACTTO(3)