php操作类

<?php /** * Project: Smarty: the PHP compiling template engine * File: Smarty_Compiler.class.php * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * @link http://smarty.php.net/ * @author Monte Ohrt <monte at ohrt dot com> * @author Andrei Zmievski <andrei@php.net> * @version 2.6.13 * @copyright 2001-2005 New Digital Group, Inc. * @package Smarty */ /* $Id: Smarty_Compiler.class.php,v 1.378 2006/01/29 18:11:22 messju Exp $ */ /** * Template compiling class * @package Smarty */ class Smarty_Compiler extends Smarty { // internal vars /**#@+ * @access private */ var $_folded_blocks = array(); // keeps folded template blocks var $_current_file = null; // the current template being compiled var $_current_line_no = 1; // line number for error messages var $_capture_stack = array(); // keeps track of nested capture buffers var $_plugin_info = array(); // keeps track of plugins to load var $_init_smarty_vars = false; var $_permitted_tokens = array('true','false','yes','no','on','off','null'); var $_db_qstr_regexp = null; // regexps are setup in the constructor var $_si_qstr_regexp = null; var $_qstr_regexp = null; var $_func_regexp = null; var $_reg_obj_regexp = null; var $_var_bracket_regexp = null; var $_num_const_regexp = null; var $_dvar_guts_regexp = null; var $_dvar_regexp = null; var $_cvar_regexp = null; var $_svar_regexp = null; var $_avar_regexp = null; var $_mod_regexp = null; var $_var_regexp = null; var $_parenth_param_regexp = null; var $_func_call_regexp = null; var $_obj_ext_regexp = null; var $_obj_start_regexp = null; var $_obj_params_regexp = null; var $_obj_call_regexp = null; var $_cacheable_state = 0; var $_cache_attrs_count = 0; var $_nocache_count = 0; var $_cache_serial = null; var $_cache_include = null; var $_strip_depth = 0; var $_additional_newline = "\n"; /**#@-*/ /** * The class constructor. */ function Smarty_Compiler() { // matches double quoted strings: // "foobar" // "foo\"bar" $this->_db_qstr_regexp = '"[^"\\\\]*(?:\\\\.[^"\\\\]*)*"'; // matches single quoted strings: // 'foobar' // 'foo\'bar' $this->_si_qstr_regexp = '\'[^\'\\\\]*(?:\\\\.[^\'\\\\]*)*\''; // matches single or double quoted strings $this->_qstr_regexp = '(?:' . $this->_db_qstr_regexp . '|' . $this->_si_qstr_regexp . ')'; // matches bracket portion of vars // [0] // [foo] // [$bar] $this->_var_bracket_regexp = '\[\$?[\w\.]+\]'; // matches numerical constants // 30 // -12 // 13.22 $this->_num_const_regexp = '(?:\-?\d+(?:\.\d+)?)'; // matches $ vars (not objects): // $foo // $foo.bar // $foo.bar.foobar // $foo[0] // $foo[$bar] // $foo[5][blah] // $foo[5].bar[$foobar][4] $this->_dvar_math_regexp = '(?:[\+\*\/\%]|(?:-(?!>)))'; $this->_dvar_math_var_regexp = '[\$\w\.\+\-\*\/\%\d\>\[\]]'; $this->_dvar_guts_regexp = '\w+(?:' . $this->_var_bracket_regexp . ')*(?:\.\$?\w+(?:' . $this->_var_bracket_regexp . ')*)*(?:' . $this->_dvar_math_regexp . '(?:' . $this->_num_const_regexp . '|' . $this->_dvar_math_var_regexp . ')*)?'; $this->_dvar_regexp = '\$' . $this->_dvar_guts_regexp; // matches config vars: // #foo# // #foobar123_foo# $this->_cvar_regexp = '\#\w+\#'; // matches section vars: // %foo.bar% $this->_svar_regexp = '\%\w+\.\w+\%'; // matches all valid variables (no quotes, no modifiers) $this->_avar_regexp = '(?:' . $this->_dvar_regexp . '|' . $this->_cvar_regexp . '|' . $this->_svar_regexp . ')'; // matches valid variable syntax: // $foo // $foo // #foo# // #foo# // "text" // "text" $this->_var_regexp = '(?:' . $this->_avar_regexp . '|' . $this->_qstr_regexp . ')'; // matches valid object call (one level of object nesting allowed in parameters): // $foo->bar // $foo->bar() // $foo->bar("text") // $foo->bar($foo, $bar, "text") // $foo->bar($foo, "foo") // $foo->bar->foo() // $foo->bar->foo->bar() // $foo->bar($foo->bar) // $foo->bar($foo->bar()) // $foo->bar($foo->bar($blah,$foo,44,"foo",$foo[0].bar)) $this->_obj_ext_regexp = '\->(?:\$?' . $this->_dvar_guts_regexp . ')'; $this->_obj_restricted_param_regexp = '(?:' . '(?:' . $this->_var_regexp . '|' . $this->_num_const_regexp . ')(?:' . $this->_obj_ext_regexp . '(?:\((?:(?:' . $this->_var_regexp . '|' . $this->_num_const_regexp . ')' . '(?:\s*,\s*(?:' . $this->_var_regexp . '|' . $this->_num_const_regexp . '))*)?\))?)*)'; $this->_obj_single_param_regexp = '(?:\w+|' . $this->_obj_restricted_param_regexp . '(?:\s*,\s*(?:(?:\w+|' . $this->_var_regexp . $this->_obj_restricted_param_regexp . ')))*)'; $this->_obj_params_regexp = '\((?:' . $this->_obj_single_param_regexp . '(?:\s*,\s*' . $this->_obj_single_param_regexp . ')*)?\)'; $this->_obj_start_regexp = '(?:' . $this->_dvar_regexp . '(?:' . $this->_obj_ext_regexp . ')+)'; $this->_obj_call_regexp = '(?:' . $this->_obj_start_regexp . '(?:' . $this->_obj_params_regexp . ')?(?:' . $this->_dvar_math_regexp . '(?:' . $this->_num_const_regexp . '|' . $this->_dvar_math_var_regexp . ')*)?)'; // matches valid modifier syntax: // |foo // |@foo // |foo:"bar" // |foo:$bar // |foo:"bar":$foobar // |foo|bar // |foo:$foo->bar $this->_mod_regexp = '(?:\|@?\w+(?::(?:\w+|' . $this->_num_const_regexp . '|' . $this->_obj_call_regexp . '|' . $this->_avar_regexp . '|' . $this->_qstr_regexp .'))*)'; // matches valid function name: // foo123 // _foo_bar $this->_func_regexp = '[a-zA-Z_]\w*'; // matches valid registered object: // foo->bar $this->_reg_obj_regexp = '[a-zA-Z_]\w*->[a-zA-Z_]\w*'; // matches valid parameter values: // true // $foo // $foo|bar // #foo# // #foo#|bar // "text" // "text"|bar // $foo->bar $this->_param_regexp = '(?:\s*(?:' . $this->_obj_call_regexp . '|' . $this->_var_regexp . '|' . $this->_num_const_regexp . '|\w+)(?>' . $this->_mod_regexp . '*)\s*)'; // matches valid parenthesised function parameters: // // "text" // $foo, $bar, "text" // $foo|bar, "foo"|bar, $foo->bar($foo)|bar $this->_parenth_param_regexp = '(?:\((?:\w+|' .