/** Evaluate template expressions in string @return mixed @param $_str string @public **/ public static function resolve($_str) { // Analyze string for correct framework expression syntax $_str = preg_replace_callback('/{(' . '(?:' . '(?:' . '@\\w+(?:\\[[^\\]]+\\]|\\.\\w+)*|' . '\'[^\']*\'|"[^"]*"|' . '(?:\\d+\\.)?\\d*(?:e[+\\-]?\\d+)?|' . 'NULL|TRUE|FALSE|' . '\\w+\\h*(?=\\(.*\\))' . ')(?!\\h*[@\\w\'"])|' . '[\\h\\.\\-\\/()+*,%!?=<>|&:]' . ')+' . ')}/i', function ($_expr) { // Evaluate expression return eval('return ' . preg_replace_callback('/(?<=@)\\w+(?:\\[[^\\]]+\\]|\\.\\w+)*/', function ($_var) { $_val = F3::get($_var[0]); // Retrieve variable contents return is_object($_val) && !method_exists($_val, '__set_state') ? (string) $_val : var_export($_val, TRUE); }, preg_replace_callback('/(\\w+)\\h*\\(([^\\)]*)\\)/', function ($_val) { // Transform empty array to NULL return $_val[1] . trim($_val[2]) == 'array' ? 'NULL' : (F3::allowed($_val[1]) ? $_val[0] : '\'' . $_val[0] . '\''); }, $_expr[1])) . ';'); }, $_str); $_error = preg_last_error(); if ($_error != PREG_NO_ERROR) { // Display PCRE-specific error message trigger_error(constant('self::TEXT_PCRE' . $_error)); return FALSE; } // Remove control characters except whitespaces return preg_replace('/[\\x00-\\x08\\x0B\\x0C\\x0E-\\x1F]/', '', $_str); }
/** Evaluate template expressions in string @return mixed @param $_str string @public **/ public static function resolve($_str) { // Analyze string for correct framework expression syntax $_str = preg_replace_callback('/\\{(' . '(?:' . '@\\w+\\b(?:\\[[^\\]]+\\]|\\.\\w+\\b)*|' . '\\w*\\h*[\\(\\,\\)]|' . '[\\h\\?\\.\\+\\-\\*\\/%!=<>&\\|:]|' . '\'[^\']*\'|"[^"]*"|\\d*\\.?\\d+(?:e\\d+)*|' . 'NULL|TRUE|FALSE' . ')+' . ')\\}/i', function ($_expr) { // Find and replace variables return eval('return (string)' . preg_replace_callback('/@(\\w+\\b(?:\\[[^\\]]+\\]|\\.\\w+\\b)*)/', function ($_var) { $_val = F3::get($_var[1]); // Retrieve variable contents return !is_object($_val) || method_exists($_val, '__set_state') ? var_export($_val, TRUE) : (string) $_val; }, preg_replace_callback('/(\\w+)\\h*\\(([^\\)]*)\\)/', function ($_val) { return $_val[1] . trim($_val[2]) == 'array' ? '\'\'' : (F3::allowed($_val[1]) ? $_val[0] : '\'' . $_val[0] . '\''); }, $_expr[1])) . ';'); }, (string) $_str); if (preg_last_error() != PREG_NO_ERROR) { trigger_error(self::TEXT_PCRELimit); return FALSE; } return $_str; }