TemplateHelper.php

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<?php
namespace Whoops\Util;

class TemplateHelper
{
    private $variables = array();

    public function escape($raw)
    {
        $flags = ENT_QUOTES;

        // HHVM has all constants defined, but only ENT_IGNORE
        // works at the moment
        if (defined("ENT_SUBSTITUTE") && !defined("HHVM_VERSION")) {
            $flags |= ENT_SUBSTITUTE;
        } else {
            // This is for 5.3.
            // The documentation warns of a potential security issue,
            // but it seems it does not apply in our case, because
            // we do not blacklist anything anywhere.
            $flags |= ENT_IGNORE;
        }

        return htmlspecialchars($raw, $flags, "UTF-8");
    }

    public function escapeButPreserveUris($raw)
    {
        $escaped = $this->escape($raw);
        return preg_replace(
            "@([A-z]+?://([-\w\.]+[-\w])+(:\d+)?(/([\w/_\.#-]*(\?\S+)?[^\.\s])?)?)@",
            "<a href=\"$1\" target=\"_blank\">$1</a>", $escaped
        );
    }

    public function slug($original)
    {
        $slug = str_replace(" ", "-", $original);
        $slug = preg_replace('/[^\w\d\-\_]/i', '', $slug);
        return strtolower($slug);
    }

    public function render($template, array $additionalVariables = null)
    {
        $variables = $this->getVariables();

        // Pass the helper to the template:
        $variables["tpl"] = $this;

        if ($additionalVariables !== null) {
            $variables = array_replace($variables, $additionalVariables);
        }

        call_user_func(function () {
            extract(func_get_arg(1));
            require func_get_arg(0);
        }, $template, $variables);
    }

    public function setVariables(array $variables)
    {
        $this->variables = $variables;
    }

    public function setVariable($variableName, $variableValue)
    {
        $this->variables[$variableName] = $variableValue;
    }

    public function getVariable($variableName, $defaultValue = null)
    {
        return isset($this->variables[$variableName]) ?
            $this->variables[$variableName] : $defaultValue;
    }

    public function delVariable($variableName)
    {
        unset($this->variables[$variableName]);
    }

    public function getVariables()
    {
        return $this->variables;
    }
}