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Top Forums Shell Programming and Scripting Comparing two files and replacing fields Post 302386131 by tltroy on Monday 11th of January 2010 11:48:36 AM
Old 01-11-2010
Comparing two files and replacing fields

I have two files with ids and email addresses. File 2 cotains a subset of the records in file 1. The key field is the first field containing the id.

file 1:
Code:
123|myadr@abc.com
456|myadr2@abc.com
789|myadr3@abc.com

file 2:
Code:
456|adr456@xyz.com

Where the record appears in the second file, I want to replace the email address in the first file with the address in the second file.

For example, output from above two files would be:
Code:
123|myadr@abc.com
456|adr456@xyz.com
789|myadr3@abc.com

I know that I can use awk somehow for this but do not know how so any help would be appreciated.

Last edited by pludi; 01-11-2010 at 06:22 PM.. Reason: code tags, please...
 

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FPUTCSV(3)								 1								FPUTCSV(3)

fputcsv - Format line as CSV and write to file pointer

SYNOPSIS
int fputcsv (resource $handle, array $fields, [string $delimiter = ","], [string $enclosure = '"'], [string $escape_char = " DESCRIPTION
fputcsv(3) formats a line (passed as a $fields array) as CSV and write it (terminated by a newline) to the specified file $handle. PARAMETERS
o $handle -The file pointer must be valid, and must point to a file successfully opened by fopen(3) or fsockopen(3) (and not yet closed by fclose(3)). o $fields - An array of values. o $delimiter - The optional $delimiter parameter sets the field delimiter (one character only). o $enclosure - The optional $enclosure parameter sets the field enclosure (one character only). o $escape_char - The optional $escape_char parameter sets the escape character (one character only). RETURN VALUES
Returns the length of the written string or FALSE on failure. CHANGELOG
+--------+---------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------+ | 5.5.4 | | | | | | | The $escape_char parameter was added | | | | +--------+---------------------------------------+ EXAMPLES
Example #1 fputcsv(3) example <?php $list = array ( array('aaa', 'bbb', 'ccc', 'dddd'), array('123', '456', '789'), array('"aaa"', '"bbb"') ); $fp = fopen('file.csv', 'w'); foreach ($list as $fields) { fputcsv($fp, $fields); } fclose($fp); ?> The above example will write the following to file.csv: aaa,bbb,ccc,dddd 123,456,789 """aaa""","""bbb""" NOTES
Note If PHP is not properly recognizing the line endings when reading files either on or created by a Macintosh computer, enabling the auto_detect_line_endings run-time configuration option may help resolve the problem. SEE ALSO
fgetcsv(3). PHP Documentation Group FPUTCSV(3)
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