他提供了以下功能来解决这个限制：

function csvstring_to_array(&$string,$CSV_SEPARATOR = ';',$CSV_ENCLOSURE = '"',$CSV_LINEBREAK = "\n") { 
  $o = array(); 

  $cnt = strlen($string); 
  $esc = false; 
  $escesc = false; 
  $num = 0; 
  $i = 0; 
  while ($i < $cnt) { 
$s = $string[$i]; 

if ($s == $CSV_LINEBREAK) { 
  if ($esc) { 
    $o[$num] .= $s; 
  } else { 
    $i++; 
    break; 
  } 
} elseif ($s == $CSV_SEPARATOR) { 
  if ($esc) { 
    $o[$num] .= $s; 
  } else { 
    $num++; 
    $esc = false; 
    $escesc = false; 
  } 
} elseif ($s == $CSV_ENCLOSURE) { 
  if ($escesc) { 
    $o[$num] .= $CSV_ENCLOSURE; 
    $escesc = false; 
  } 

  if ($esc) { 
    $esc = false; 
    $escesc = true; 
  } else { 
    $esc = true; 
    $escesc = false; 
  } 
} else { 
  if ($escesc) { 
    $o[$num] .= $CSV_ENCLOSURE; 
    $escesc = false; 
  } 

  $o[$num] .= $s; 
} 

$i++; 
  } 

//  $string = substr($string,$i); 

  return $o; 
}

看起来它会成功.