#!/usr/bin/perl

# https://perlmonks.org/?node_id=1226189

use strict;
use warnings;

while( <DATA> )
  {
  if( /\|([^|,]*(?:,[^|,]*)+)\|/ )
    {
    print "$`|$_|$'" for split /,/, $1;
    }
  else
    {
    print;
    }
  }

__DATA__
 some text FOO | some text BAR | oh , no , commas | some text BAZ | so
+me text QUX
 some text FOO | some text BAR | single | some text BAZ | some text QU
+X

[download]

Outputs: 

 some text FOO | some text BAR | oh | some text BAZ | some text QUX
 some text FOO | some text BAR | no | some text BAZ | some text QUX
 some text FOO | some text BAR | commas | some text BAZ | some text QU
+X
 some text FOO | some text BAR | single | some text BAZ | some text QU
+X

[download]

In reply to Re: splinting a line of text by comma by tybalt89
in thread splinting a line of text by comma by benaw

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