- preg_match_all("!(?:0x[a-fA-F0-9]+)|([a-zA-Z][a-zA-Z0-9_]+)!",$equation, $match);
- $allowed_funcs = array('int','abs','ceil','cos','exp','floor','log','log10',
- 'max','min','pi','pow','rand','round','sin','sqrt','srand','tan');
-
- foreach($match[1] as $curr_var) {
- if ($curr_var && !in_array($curr_var, array_keys($params)) && !in_array($curr_var, $allowed_funcs)) {
- $smarty->trigger_error("math: function call $curr_var not allowed");
+ preg_match_all('!(?:0x[a-fA-F0-9]+)|([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)!', $equation, $match);
+
+ foreach ($match[ 1 ] as $curr_var) {
+ if ($curr_var && !isset($params[ $curr_var ]) && !isset($_allowed_funcs[ $curr_var ])) {
+ trigger_error("math: function call $curr_var not allowed", E_USER_WARNING);
+