Siesvi -- PHP CSV Parser (Generator)

<?php
function siesvi( $fname, $mode = 0 ) {
    $fh = fopen( $fname, 'r' );
    $headers = array();
    try {
        while ( ( $str = fgets( $fh ) ) !== false ){
            $quote = 0;
            $cell = "";
            $row = array();
            for ( $i = 0, $strlen = strlen( $str ); $i < $strlen; $i++ ){
                $chr = $str[$i];
                if ( $quote == 0 && $chr == "," ){
                    $row[] = $cell;
                    $cell = "";
                } elseif ( $quote == 0 && $chr == '"' ){
                    $quote = 1;
                } elseif ( $quote == 1 && $chr == '"' ){
                    if ( $str[ $i + 1 ] == '"' )
                        $cell .= $chr;
                    $quote = 0;
                } elseif ( $quote == 1 && $chr == "\n" ){
                    $cell .= $chr;
                    $str .= fgets( $fh );
                    $strlen = strlen( $str );
                } elseif ( $quote == 1 || ( $chr != "\r" && $chr != "\n" )) {
                    $cell .= $chr;
                }
            }
            $row[] = $cell;
            if ( !( $mode & 4 ) && ! $headers ){
                $headers = $row;
                continue;
            }
            if ( $mode & 1 || ! $headers ){
                if ( $mode & 2 )
                    yield (object) $row;
                else
                    yield $row;
            } else {
                if ( $mode & 2 )
                    yield (object) array_combine( $headers, $row );
                else
                    yield array_combine( $headers, $row );
            }
        }
    } catch( Exception $e ){
        echo "EXCEPTION: " . $e->getMessage();
    } finally {
        fclose( $fh );
    }
}
/*
file_put_contents( __DIR__ . "/test.csv", <<<'EOD'
id,"name",price,"notes"
1,"kucing ""kampung""",1000,"""Suaranya"" ""meong""
""meong"""
2,ayam", "dilepeh"""",2000,"Suaranya sreng-sreng, tadinya, pas digoreng.."
EOD
);

foreach ( range(0,7) as $mode ){
    echo sprintf( "MODE = %s\r\n", $mode );
    foreach( siesvi( __DIR__ . "/test.csv", $mode ) as $k => $v) {
        echo sprintf( "Data ke-%s\r\n", $k );
        print_r( $v );
        echo "\r\n";
        //if ($k==0) break;
    }
    echo "----\r\n";
}
*/