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Full Discussion: Parse csv file
Top Forums Shell Programming and Scripting Parse csv file Post 302344507 by vfrg on Monday 17th of August 2009 12:56:05 AM
Old 08-17-2009
Parse csv file
Hi,

Our requirement is to parse the input file(.csv format). The each column in the file is delimited with comma. We need to take each column and apply some business validation rule.

If data itself contains comma, then those fields are enclosed with double quotes ("). We can see this double quotes symbols by opening the csv file in notepad or wordpad.

Some times, data itself contains double quotes, in those cases the data is enclosed in double quotes also for each double quotes, one extra double quotes is added. You can see them if we open in notepad or word pad.

Sample example of the csv file when opened in notepad is as shown below
Test.csv
========
This,test is,with out comma or double quotes
This,"test, contains",comma
This,"test contains ""double quotes"" ","and , comma"

Output required is:
1st Line:
Field1:This
Field2:test is
Field3:with out comma or double quotes

2nd Line:
Field1:This
Field2:test, contains
Field3:comma

3rd Line:
Field1:This
Field2:test contains "double quotes"
Field3:and , comma


If you save the above file contents into a csv file and open in excel, then you will see column values in each line matches my required output.

I tried hard and could not get right way to do this. Please help me in achieving the above.

I have attached test.csv for the reference purpose.

Thanks in advance,
Venkat
test.zip (237 Bytes) 
Last edited by vfrg; 08-17-2009 at 06:39 AM..
 

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LEARN ABOUT PHP

escapeshellarg

ESCAPESHELLARG(3)							 1							 ESCAPESHELLARG(3)

escapeshellarg - Escape a string to be used as a shell argument

SYNOPSIS

       string escapeshellarg (string  $arg)

DESCRIPTION

       escapeshellarg(3)  adds	single quotes around a string and quotes/escapes any existing single quotes allowing you to pass a string directly
       to a shell function and having it be treated as a single safe argument. This function should be used  to  escape  individual  arguments	to
       shell functions coming from user input. The shell functions include exec(3), system(3) and the backtick operator.

	On Windows, escapeshellarg(3) instead removes percent signs, replaces double quotes with spaces and adds double quotes around the string.

PARAMETERS

	      o $arg
		- The argument that will be escaped.

RETURN VALUES

	The escaped string.

EXAMPLES

       Example #1

	      escapeshellarg(3) example

	      <?php
	      system('ls '.escapeshellarg($dir));
	      ?>

SEE ALSO

       escapeshellcmd(3), exec(3), popen(3), system(3), backtick operator.

PHP Documentation Group 													 ESCAPESHELLARG(3)
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