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<?php

namespace EventsGroup\View\Helper;

use Zend\View\Helper\AbstractHelper;

class VariablesTree extends AbstractHelper
{

    /**
     * Taking a variable in PHP and convert it to a highlighted readable html string
     *
     * @param mixed $var
     * @return string
     */
    public function __invoke($var)
    {
        // Convert the mixed variable to a readable string
        $code = var_export($var, true);

        // If the variable contained object, var_export will add __set_state callbacks that need to be removed
        $code = str_replace('::__set_state(array(', ' Object (', $code);
        $code = str_replace('))', ')', $code);

        // set color scheme
        ini_set('highlight.string', 'green');
        ini_set('highlight.comment', 'gray');
        ini_set('highlight.keyword', 'blue');
        ini_set('highlight.bg', 'white');
        ini_set('highlight.default', 'black');
        ini_set('highlight.html', 'white');

        // "Paint" the code in syntax highlighting colors
        //	Using highlight_string requires the php tag in the code itsef, the php tag removed after the highlighting
        $code = highlight_string('<?php '.$code, true);
        $code = str_replace('&lt;?php&nbsp;', '', $code);

        return $code;
    }
}