ThinkPHP/Library/Vendor/Smarty/sysplugins/smarty_internal_resource_file.php

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<?php
/**
 * Smarty Internal Plugin Resource File
 *
 * @package Smarty
 * @subpackage TemplateResources
 * @author Uwe Tews
 * @author Rodney Rehm
 */

/**
 * Smarty Internal Plugin Resource File
 *
 * Implements the file system as resource for Smarty templates
 *
 * @package Smarty
 * @subpackage TemplateResources
 */
class Smarty_Internal_Resource_File extends Smarty_Resource {

    /**
     * populate Source Object with meta data from Resource
     *
     * @param Smarty_Template_Source   $source    source object
     * @param Smarty_Internal_Template $_template template object
     */
    public function populate(Smarty_Template_Source $source, Smarty_Internal_Template $_template=null)
    {
        $source->filepath = $this->buildFilepath($source, $_template);

        if ($source->filepath !== false) {
            if (is_object($source->smarty->security_policy)) {
                $source->smarty->security_policy->isTrustedResourceDir($source->filepath);
            }

            $source->uid = sha1($source->filepath);
            if ($source->smarty->compile_check && !isset($source->timestamp)) {
                $source->timestamp = @filemtime($source->filepath);
                $source->exists = !!$source->timestamp;
            }
        }
    }

    /**
     * populate Source Object with timestamp and exists from Resource
     *
     * @param Smarty_Template_Source $source source object
     */
    public function populateTimestamp(Smarty_Template_Source $source)
    {
        $source->timestamp = @filemtime($source->filepath);
        $source->exists = !!$source->timestamp;
    }

    /**
     * Load template's source from file into current template object
     *
     * @param Smarty_Template_Source $source source object
     * @return string template source
     * @throws SmartyException if source cannot be loaded