Question

了解有关eval'd代码的许多意想不到的问题，但没有一个可以帮助我找到这个特定的部分：

@eval('$return=(bool)('. $test.');');

有什么想法吗？

显示错误的完整代码是

$notfound = TRUE;
                            if (isset($child['when'])) {
                                foreach ($child['when'] as $grandchild)  {
                                    $test = $this->build_mask($datatree, $grandchild['test'], $direction, $cindex, $clast, $ckey, TRUE, $carray);
                                    $return = NULL;
                                    @eval('$return=(bool)('. $test .');');
                                    if ($return === TRUE) {
                                        $notfound = FALSE;
                                        $built[] = $this->build_mask($datatree, $grandchild['true'], $direction, $cindex, $clast, $ckey, $incode, $carray);
                                        break;
                                    }
                                }
                            }

Answer 1

Use below code:-

$test = 'XXX';
eval('$return=(bool)$test;');
if($return){  // true
    // do your stuff
}

You can simply write it as:-

$test = 'XXX';
$return=(bool)$test;
if($return){  // true
    // do your stuff
}

OR use !empty() to avoid unnecessary type casting.

$test = 'XXX';
if(!empty($test)){ // true
    // do your stuff
}

Suggestion:- Never use @ to hide your errors. You should ON your error_reporting in development mode.

eval代码中的语法错误，意外'）'

1 个答案: