Roe Web Builder - Dysfunctional Text Swapping

function load_swaps()
{
    $nen = nen_ini();

    $alt = array();

    $dat = file_get_contents( $nen[ 'root' ]. 'swaps.dat' );

    $swaps = explode( '\r\n', $dat );

    $index = 0;

    while( $index < count( $swaps ) )
    {
        $e = explode( ':', $swaps[ $index ] );
        if( count( $e ) > 0 )
        {
            $e = $swaps[ 0 ];
            $r = substr( $swaps[ $index ], 0, strlen( $e ) );

            $alt[ $e ] = $r;
        }
        $index++;
    }

    return $alt;
}

function perform_swaps( $pagedata = '' )
{
    $alt = load_swaps();
    foreach( $alt as $key => $value )
    {
        echo $key;
        $pagedata = str_replace( '{{'. $key. '}}', $value, $pagedata );
    }
    return $pagedata;
}

?>