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PHP 根据前台传递的字符计算值,该怎么处理

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Release: 2016-06-13 13:30:09
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PHP 根据前台传递的字符计算值
前台:


后台:

$b=1; $c=2;
$a = $b.$_POST['a'].$c;

如果选择的是第一个 =

则会出现语法错误。

请问有什么方法使其正确,$a=2

------解决方案--------------------
你可以在后台来判断$_POST['a']的值,如果是=,你采取$a=$c;

------解决方案--------------------
用switch来挨个的比较,不能像你这么简单地$a = $b.$_POST['a'].$c;处理。

------解决方案--------------------
不大可能出现语法错误。
------解决方案--------------------
楼主这样得用eval了。

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