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Looping through the contents of a CSV

Posted on 2009-07-14
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Last Modified: 2012-05-07
I need to loop through the contents of a CSV and pass the values of columns 1 and 6 to a function which then does something with the values, the program should then move to the next row of the csv and grab the same column values and pass those to my function. The program should loop 10 times. Once the loop is complete the first 10 rows of the scv should be deleted.

Can someone help please?

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Question by:MayoorPatel
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Expert Comment

by:flob9
ID: 24849294
this is a repost to this one : http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/PHP/Q_24568102.html


<?php
 
//read the data
$lines = split("\n",file_get_contents("file.csv"));
 
 
//parse first 10 lines
$cnt = 0;
foreach($lines as $line)
{
  list($col1,$col2,$col3,$col4,$col5,$col6) = split(";",$line);
  //for each line, call my_func
  my_func($col1,$col2,$col3,$col4,$col5,$col6);
  $cnt++;
  if($cnt==10)
    break;
}
//once done, put the remaining data back into the csv file
if(count($lines)>$cnt)
	file_put_contents("file.csv",join("\n",array_slice($lines,10)));
 
?>

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Expert Comment

by:xBellox
ID: 24849323
Try this (Remeber to change 'test.csv' to your file name, change ";" to your csv delimiter    and your_function to your function name):



<?
	$filename = 'test.csv';
	$f = file($filename);
	
	for ($i=0; ($i<10 && $i<count($f)); $i++) {
		$columns = explode(";", $f[$i]);
		your_function($f[0],$f[1],$f[2],$f[3],$f[4],$f[5]);
	}
	
?>

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Accepted Solution

by:
xBellox earned 500 total points
ID: 24849402
Oops... Little mistake... It isn't $f[0], $f[1]... It ss $columns[0].$columns[1]

<?
		$filename = 'test.csv';
        $f = file($filename);        
        for ($i=0; ($i<10 && $i<count($f)); $i++) {
                $columns = explode(";", $f[$i]);                 
				your_function($columns[0],$columns[1],$columns[2],$columns[3],$columns[4],$columns[5]);
        }      
		if(count($f)>=$i) file_put_contents($filename,join("\n",array_slice($f,10)));
?>

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Author Comment

by:MayoorPatel
ID: 24849826
Flob your solution was NOT complete
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Author Closing Comment

by:MayoorPatel
ID: 31603238
Bravo!
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Expert Comment

by:flob9
ID: 24850940
I don't see the difference
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