note 85790 deleted from function.eval by peehaa

Note Submitter: luke at cywh dot com ---- Finally, a good use for eval :)! If you want to be able to check for syntax errors WITHOUT executing the code, add "return true;" before all the code. All execution of the code stops after that mark, and makes eval returns true on no syntax errors, and false on syntax errors. This is especially useful for anyone making a template system. Here's a working example: <?php function check_syntax($code) { return @eval('return true;' . $code); } print "<b>No Code execution:</b><br />\n"; $code = "print \"<b><i>hello! you don't want me...</i></b><br />\n\";"; var_dump(check_syntax($code)); // Good syntax print "<br />\n"; var_dump(check_syntax($code . ' ==')); // Bad syntax print "<br />\n"; print "<b>Code Executed...Bad</b>:<br />\n"; var_dump(eval($code) === null); // Good syntax print "<br />\n"; var_dump(@eval($code . ' ==') === null); // Bad syntax ?>