Simple Csv parser for PHP <= 5.2

csv_to_array.php

public static function csv_to_array($csv) {
    if (substr($csv,-1) != "\n" && substr($csv,-1) != "\r") {
        $csv .= "\n";
    }    
    $len = strlen($csv);

    $table = array();
    $cur_row = array();
    $cur_val = "";
    $state = "first item";


    for ($i = 0; $i < $len; $i++)
    {
        //sleep(1000);
    $ch = substr($csv,$i,1);
        if ($state == "first item")
        {
            if ($ch == '"')
            {
                $state = "we're quoted hea";
            }
            elseif ($ch == ",") //empty
            {
                $cur_row[] = ""; //done with first one
                $cur_val = "";
                $state = "first item";
            }
            elseif ($ch == "\n")
            {
                $cur_row[] = $cur_val;
                $table[] = $cur_row;
                $cur_row = array();
                $cur_val = "";
                $state = "first item";
            }
            elseif ($ch == "\r")
            {
                $state = "wait for a line feed, if so close out row!";
            }
            else
            {
                $cur_val .= $ch;
                $state = "gather not quote";
            }
            
        }

        elseif ($state == "we're quoted hea")
        {
            if ($ch == '"')
            {
                $state = "potential end quote found";
            }
            else
            {
                $cur_val .= $ch;
            }
        }
        elseif ($state == "potential end quote found")
        {
            if ($ch == '"')
            {
                $cur_val .= '"';
                $state = "we're quoted hea";
            }
            elseif ($ch == ',')
            {
                $cur_row[] = $cur_val;
                $cur_val = "";
                $state = "first item";
            }
            elseif ($ch == "\n")
            {
                $cur_row[] = $cur_val;
                $table[] = $cur_row;
                $cur_row = array();
                $cur_val = "";
                $state = "first item";
            }
            elseif ($ch == "\r")
            {
                $state = "wait for a line feed, if so close out row!";
            }
            else
            {
                $cur_val .= $ch;
                $state = "we're quoted hea";
            }

        }
        elseif ($state == "wait for a line feed, if so close out row!")
        {
            if ($ch == "\n")
            {
                $cur_row[] = $cur_val;
                $cur_val = "";
                $table[] = $cur_row;
                $cur_row = array();
                $state = "first item";

            }
            else
            {
                $cur_row[] = $cur_val;
                $table[] = $cur_row;
                $cur_row = array();
                $cur_val = $ch;
                $state = "gather not quote";
            }	
        }

        elseif ($state == "gather not quote")
        {
            if ($ch == ",")
            {
                $cur_row[] = $cur_val;
                $cur_val = "";
                $state = "first item";
                
            }
            elseif ($ch == "\n")
            {
                $cur_row[] = $cur_val;
                $table[] = $cur_row;
                $cur_row = array();
                $cur_val = "";
                $state = "first item";
            }
            elseif ($ch == "\r")
            {
                $state = "wait for a line feed, if so close out row!";
            }
            else
            {
                $cur_val .= $ch;
            }
        }

        }

        return $table;
    }