Regular Expression help

[BrettCarr]

I want to put "],[" every thirteen commas with a regular expression

Im trying this is the string

$teststring = "2010-03-14,74527,645,New,7417417,Toll,2,74527417,32,202,7452741741,ghtgbwt,gtgwtgwtfgwtrg,2010-03-14,857527527,645,New,7417418,Toll,7,74527418,32,202,527527,hjm,djmdmdjmdjmdgjm,2010-03-14,85285,645,New,7417419,Toll,2,74527419,32,202,750757,jryjkryjkfryk,yjmyjyjtyjhm";

The first preg_replace puts commas around my strings

The next one is where im trying to put square brackets every 13 commas

<?php
$teststring = "2010-03-14,74527,645,New,7417417,Toll,2,74527417,32,202,7452741741,ghtgbwt,gtgwtgwtfgwtrg,2010-03-14,857527527,645,New,7417418,Toll,7,74527418,32,202,527527,hjm,djmdmdjmdjmdgjm,2010-03-14,85285,645,New,7417419,Toll,2,74527419,32,202,750757,jryjkryjkfryk,yjmyjyjtyjhm";
$teststring1 =  preg_replace("/([a-zA-Z0-9_\-]+?),/" , "\"$1\",",$teststring);
$teststring2 =  preg_replace("/\,{13}/" , "],[",$teststring1);

var_dump($teststring2);
?>

[cags]

I'm not convinced using Regex is the best method to edit a CSV file (which is what you appear to be working with), but something like this perhaps...

 

$pattern = '#(?:[^,]*,){12}[^,]*#';
$replacement = '$0],[';

 

Disclaimer: That's completely untested.

[sasa]

try

<?php
$teststring = "2010-03-14,74527,645,New,7417417,Toll,2,74527417,32,202,7452741741,ghtgbwt,gtgwtgwtfgwtrg,2010-03-14,857527527,645,New,7417418,Toll,7,74527418,32,202,527527,hjm,djmdmdjmdjmdgjm,2010-03-14,85285,645,New,7417419,Toll,2,74527419,32,202,750757,jryjkryjkfryk,yjmyjyjtyjhm";
//$teststring1 =  preg_replace("/([a-zA-Z0-9_\-]+?),/" , "\"$1\",",$teststring);
//$teststring2 =  preg_replace("/\,{13}/" , "],[",$teststring1);
$a = array_chunk(explode(',',$teststring),13);
foreach ($a as $k => $b) $a[$k] = '"'.implode('","', $b).'"';
$teststring2 = implode('],[',$a);
var_dump($teststring2);
?>