preg_split

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OK, I have this file:

<web stuff>
<?php
      $CID_FILE= 'vonage.callers';
      $lines=file($CID_FILE);
      foreach ($lines as $line) {
$cid=preg_split('^([^,]+),\s?(.*)', $line, -1, PREG_SPLIT_DELIM_CAPTURE);

      }
 ?>
<web stuff>

the trouble is, $cid is empty. The actual file has lots of print lines, so I know that $lines is an array with each line for $CID_FILE as one element of the array and that $line gets the data from a single array element correctly.

What I want is for each line to be an array, split at the first comma. The regex works in BBEdit, where I can search for

^([^,]+),\s?(.*)

and replace with

\2 \1

and it does the right thing, over and over, so the regex is not the issue. It's something that I am not doing right/understanding in preg_split. I've also tried:

 $cid=preg_split('^([^,]+),', $line);
 $cid=preg_split('^([^,]+),\s?(.*)', $line, PREG_SPLIT_DELIM_CAPTURE);
 $cid=preg_split('^[^,]+,', $line, -1);
 $cid=preg_split('^[^,]+,', $line);

The actual code with the extra printing is here:

<http://akane.covisp.net/~kreme/vonage.phps>
<http://akane.covisp.net/~kreme/vonage.php>

and the sample data is

<http://akane.covisp.net/~kreme/vonage.callers>


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