PHP function for displaying the full contents of a variable - a customisable var_dump

VarDisplay

<?php

/**
 * Recursively iterates over $var, displaying each
 * property/variable contained within
 * @param  mixed   $var          Variable of any type
 * @param  boolean $displayTypes Whether to display the types along with values
 * @param  integer $depth        private var for telling how deep we are
 * @return null                  always returns null
 */
function display($var, $displayTypes = True, $depth = 0){
    $add = '';
    if($displayTypes){
        if(is_object($var)){
            echo 'Object: ' . get_class($var);
        } else {
            echo sprintf('%-7s',gettype($var));
        }
        $add = '    ';
    }
    if(isIterable($var)){
        if($depth>0 || $displayTypes) echo "\n";
        if($displayTypes){
            echo $add.str_repeat('    ', $depth)."(\n";
        }
        foreach($var as $key => $val){
            echo str_repeat('    ', $depth);
            if($displayTypes){
                echo str_repeat($add, 2);
                echo sprintf('%-7s',gettype($key));
                echo ' ';
            }
            if(is_string($key)){
                echo '["'.$key.'"]';
            } else {
                echo '['.$key.']';
            }
            echo " => ";
            display($val, $displayTypes, $depth+1);
        }
        if($displayTypes){
            echo "".$add.str_repeat('    ', $depth).")\n";
        }
    } else {
        if($displayTypes){
            echo ' ';
        }
        if(is_string($var)){
            echo '"'.$var . "\"\n";
        } else {
            echo $var . "\n";
        }
    }
    return null;
}

/**
 * Determines if a variable is iterable or not
 * @param  mixed   $var The input variable...
 * @return boolean      Whether we can iterate over it or not
 */
function isIterable($var) {
    set_error_handler(function ($errno, $errstr, $errfile, $errline, array $errcontext)
    {
        throw new \ErrorException($errstr, null, $errno, $errfile, $errline);
    });

    try {
        foreach ($var as $v) {
            break;
        }
    } catch (\ErrorException $e) {
        restore_error_handler();
        return false;
    }
    restore_error_handler();
    return true;
}

?>