01-27-2009
extract a field by logic
below are the contents of file 'tmp.out':
2|34|534|
1|355|54|
1|443|34|
3|43|768|
3|7|887|
1|9|990|
How do I extract the 2nd and 3rd columns of file 'tmp.out' only when the first column equals '1'.
Note that this file will be huge; atleast 5million+ rows, so I want to avoid looping over this file.
Thanks,
- CB
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LEARN ABOUT PHP
phar.extractto
PHAR.EXTRACTTO(3) 1 PHAR.EXTRACTTO(3)
Phar::extractTo - Extract the contents of a phar archive to a directory
SYNOPSIS
public bool Phar::extractTo (string $pathto, [string|array $files], [bool $overwrite = false])
DESCRIPTION
Note
This method requires the php.ini setting phar.readonly to be set to 0 in order to work for Phar objects. Otherwise, a PharException
will be thrown.
Extract all files within a phar 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 within an archive to the file to delete.
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 Phar.extractTo(3) example
<?php
try {
$phar = new Phar('myphar.phar');
$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
PharData.extractTo(3).
PHP Documentation Group PHAR.EXTRACTTO(3)