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  1. <?php
  2. $string = '...nomaterwhat13124123,"321,00",,nomaterwhat
  3. ...nomaterwhat12321,"322,20","134,00",nomaterwhat
  4. ...nomaterwhat1321,"211,00",,nomaterwhat
  5. ...nomaterwhat31313,"241,00",,nomaterwhat';
  6. echo preg_replace("/,(\"\d+,\d{2}\"),,nomaterwhat$/m", ",$1,$1,nomaterwhat", $string);
Success #stdin #stdout 0.02s 52432KB
stdin
Standard input is empty
stdout
...nomaterwhat13124123,"321,00","321,00",nomaterwhat
...nomaterwhat12321,"322,20","134,00",nomaterwhat
...nomaterwhat1321,"211,00","211,00",nomaterwhat
...nomaterwhat31313,"241,00","241,00",nomaterwhat