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   1  <?php
   2  /**
   3   * Smarty Internal Plugin Compile Eval
   4   *
   5   * Compiles the {eval} tag.
   6   *
   7   * @package Smarty
   8   * @subpackage Compiler
   9   * @author Uwe Tews
  10   */
  11  
  12  /**
  13   * Smarty Internal Plugin Compile Eval Class
  14   *
  15   * @package Smarty
  16   * @subpackage Compiler
  17   */
  18  class Smarty_Internal_Compile_Eval extends Smarty_Internal_CompileBase {
  19  
  20      /**
  21       * Attribute definition: Overwrites base class.
  22       *
  23       * @var array
  24       * @see Smarty_Internal_CompileBase
  25       */
  26      public $required_attributes = array('var');
  27      /**
  28       * Attribute definition: Overwrites base class.
  29       *
  30       * @var array
  31       * @see Smarty_Internal_CompileBase
  32       */
  33      public $optional_attributes = array('assign');
  34      /**
  35       * Attribute definition: Overwrites base class.
  36       *
  37       * @var array
  38       * @see Smarty_Internal_CompileBase
  39       */
  40      public $shorttag_order = array('var','assign');
  41  
  42      /**
  43       * Compiles code for the {eval} tag
  44       *
  45       * @param array  $args     array with attributes from parser
  46       * @param object $compiler compiler object
  47       * @return string compiled code
  48       */
  49      public function compile($args, $compiler)
  50      {
  51          $this->required_attributes = array('var');
  52          $this->optional_attributes = array('assign');
  53          // check and get attributes
  54          $_attr = $this->getAttributes($compiler, $args);
  55          if (isset($_attr['assign'])) {
  56                // output will be stored in a smarty variable instead of beind displayed
  57              $_assign = $_attr['assign'];
  58          }
  59  
  60          // create template object
  61          $_output = "\$_template = new {$compiler->smarty->template_class}('eval:'.".$_attr['var'].", \$_smarty_tpl->smarty, \$_smarty_tpl);";
  62          //was there an assign attribute?
  63          if (isset($_assign)) {
  64              $_output .= "\$_smarty_tpl->assign($_assign,\$_template->fetch());";
  65          } else {
  66              $_output .= "echo \$_template->fetch();";
  67          }
  68          return "<?php $_output ?>";
  69      }
  70  
  71  }
  72  
  73  ?>