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

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<?php
/**
 * Smarty Internal Plugin CompileBase
 *
 * @package Smarty
 * @subpackage Compiler
 * @author Uwe Tews
 */

/**
 * This class does extend all internal compile plugins
 *
 * @package Smarty
 * @subpackage Compiler
 */
abstract class Smarty_Internal_CompileBase {

    /**
     * Array of names of required attribute required by tag
     *
     * @var array
     */
    public $required_attributes = array();
    /**
     * Array of names of optional attribute required by tag
     * use array('_any') if there is no restriction of attributes names
     *
     * @var array
     */
    public $optional_attributes = array();
    /**
     * Shorttag attribute order defined by its names
     *
     * @var array
     */
    public $shorttag_order = array();
    /**
     * Array of names of valid option flags
     *
     * @var array
     */
    public $option_flags = array('nocache');

    /**
     * This function checks if the attributes passed are valid
     *
     * The attributes passed for the tag to compile are checked against the list of required and
     * optional attributes. Required attributes must be present. Optional attributes are check against
     * the corresponding list. The keyword '_any' specifies that any attribute will be accepted
     * as valid
     *
     * @param object $compiler   compiler object
     * @param array  $attributes attributes applied to the tag
     * @return array of mapped attributes for further processing
     */
    public function getAttributes($compiler, $attributes)
    {
        $_indexed_attr = array();
        // loop over attributes
        foreach ($attributes as $key => $mixed) {