pretty print for PHP

pp.php

/**
 * pretty print for PHP
 */
function pp($obj, $printer = 'var_dump')
{
    if (isset($_SERVER['REQUEST_METHOD'])) echo '<pre>' . PHP_EOL;

    $bts = debug_backtrace(false);
    $bt = array_shift($bts);
    echo $bt['file'] . ':' . $bt['line'] . PHP_EOL;

    call_user_func($printer, $obj);

    if (isset($_SERVER['REQUEST_METHOD'])) echo '</pre>';
    echo PHP_EOL;
}

function pr($obj)
{
    pp($obj, 'print_r');
}

function vd($obj)
{
    pp($obj, 'var_dump');
}

function ve($obj)
{
    pp($obj, 'var_export');
}