📄 smarty_compiler.class.php
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<?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 2.6.12
* @copyright 2001-2005 New Digital Group, Inc.
* @package Smarty
*/
/* $Id: Smarty_Compiler.class.php,v 1.376 2006/01/15 19:29:45 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 = '(?:\((?:\w+|'
. $this->_param_regexp . '(?:\s*,\s*(?:(?:\w+|'
. $this->_param_regexp . ')))*)?\))';
// matches valid function call:
// foo()
// foo_bar($foo)
// _foo_bar($foo,"bar")
// foo123($foo,$foo->bar(),"foo")
$this->_func_call_regexp = '(?:' . $this->_func_regexp . '\s*(?:'
. $this->_parenth_param_regexp . '))';
}
/**
* compile a resource
*
* sets $compiled_content to the compiled source
* @param string $resource_name
* @param string $source_content
* @param string $compiled_content
* @return true
*/
function _compile_file($resource_name, $source_content, &$compiled_content)
{
if ($this->security) {
// do not allow php syntax to be executed unless specified
if ($this->php_handling == SMARTY_PHP_ALLOW &&
!$this->security_settings['PHP_HANDLING']) {
$this->php_handling = SMARTY_PHP_PASSTHRU;
}
}
$this->_load_filters();
$this->_current_file = $resource_name;
$this->_current_line_no = 1;
$ldq = preg_quote($this->left_delimiter, '~');
$rdq = preg_quote($this->right_delimiter, '~');
// run template source through prefilter functions
if (count($this->_plugins['prefilter']) > 0) {
foreach ($this->_plugins['prefilter'] as $filter_name => $prefilter) {
if ($prefilter === false) continue;
if ($prefilter[3] || is_callable($prefilter[0])) {
$source_content = call_user_func_array($prefilter[0],
array($source_content, &$this));
$this->_plugins['prefilter'][$filter_name][3] = true;
} else {
$this->_trigger_fatal_error("[plugin] prefilter '$filter_name' is not implemented");
}
}
}
/* fetch all special blocks */
$search = "~{$ldq}\*(.*?)\*{$rdq}|{$ldq}\s*literal\s*{$rdq}(.*?){$ldq}\s*/literal\s*{$rdq}|{$ldq}\s*php\s*{$rdq}(.*?){$ldq}\s*/php\s*{$rdq}~s";
preg_match_all($search, $source_content, $match, PREG_SET_ORDER);
$this->_folded_blocks = $match;
reset($this->_folded_blocks);
/* replace special blocks by "{php}" */
$source_content = preg_replace($search.'e', "'"
. $this->_quote_replace($this->left_delimiter) . 'php'
. "' . str_repeat(\"\n\", substr_count('\\0', \"\n\")) .'"
. $this->_quote_replace($this->right_delimiter)
. "'"
, $source_content);
/* Gather all template tags. */
preg_match_all("~{$ldq}\s*(.*?)\s*{$rdq}~s", $source_content, $_match);
$template_tags = $_match[1];
/* Split content by template tags to obtain non-template content. */
$text_blocks = preg_split("~{$ldq}.*?{$rdq}~s", $source_content);
/* loop through text blocks */
for ($curr_tb = 0, $for_max = count($text_blocks); $curr_tb < $for_max; $curr_tb++) {
/* match anything resembling php tags */
if (preg_match_all('~(<\?(?:\w+|=)?|\?>|language\s*=\s*[\"\']?php[\"\']?)~is', $text_blocks[$curr_tb], $sp_match)) {
/* replace tags with placeholders to prevent recursive replacements */
$sp_match[1] = array_unique($sp_match[1]);
usort($sp_match[1], '_smarty_sort_length');
for ($curr_sp = 0, $for_max2 = count($sp_match[1]); $curr_sp < $for_max2; $curr_sp++) {
$text_blocks[$curr_tb] = str_replace($sp_match[1][$curr_sp],'%%%SMARTYSP'.$curr_sp.'%%%',$text_blocks[$curr_tb]);
}
/* process each one */
for ($curr_sp = 0, $for_max2 = count($sp_match[1]); $curr_sp < $for_max2; $curr_sp++) {
if ($this->php_handling == SMARTY_PHP_PASSTHRU) {
/* echo php contents */
$text_blocks[$curr_tb] = str_replace('%%%SMARTYSP'.$curr_sp.'%%%', '<?php echo \''.str_replace("'", "\'", $sp_match[1][$curr_sp]).'\'; ?>'."\n", $text_blocks[$curr_tb]);
} else if ($this->php_handling == SMARTY_PHP_QUOTE) {
/* quote php tags */
$text_blocks[$curr_tb] = str_replace('%%%SMARTYSP'.$curr_sp.'%%%', htmlspecialchars($sp_match[1][$curr_sp]), $text_blocks[$curr_tb]);
} else if ($this->php_handling == SMARTY_PHP_REMOVE) {
/* remove php tags */
$text_blocks[$curr_tb] = str_replace('%%%SMARTYSP'.$curr_sp.'%%%', '', $text_blocks[$curr_tb]);
} else {
/* SMARTY_PHP_ALLOW, but echo non php starting tags */
$sp_match[1][$curr_sp] = preg_replace('~(<\?(?!php|=|$))~i', '<?php echo \'\\1\'?>'."\n", $sp_match[1][$curr_sp]);
$text_blocks[$curr_tb] = str_replace('%%%SMARTYSP'.$curr_sp.'%%%', $sp_match[1][$curr_sp], $text_blocks[$curr_tb]);
}
}
}
}
/* Compile the template tags into PHP code. */
$compiled_tags = array();
for ($i = 0, $for_max = count($template_tags); $i < $for_max; $i++) {
$this->_current_line_no += substr_count($text_blocks[$i], "\n");
$compiled_tags[] = $this->_compile_tag($template_tags[$i]);
$this->_current_line_no += substr_count($template_tags[$i], "\n");
}
if (count($this->_tag_stack)>0) {
list($_open_tag, $_line_no) = end($this->_tag_stack);
$this->_syntax_error("unclosed tag \{$_open_tag} (opened line $_line_no).", E_USER_ERROR, __FILE__, __LINE__);
return;
}
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