PHP使我远离eval;)字符串内的变量

问题描述：

出于某种原因，我现在不愿进入，我有一个像这样的字符串:

For reasons I'd rather not get into right now, I have a string like so:

<div>$title</div>

使用mysql_real_escape_string存储在数据库中的

that gets stored in a database using mysql_real_escape_string.

在正常脚本执行期间，该字符串被解析并存储在变量$string中，然后被发送到function($string).

During normal script execution, that string gets parsed and stored in a variable $string and then gets sent to a function($string).

在此功能中，我正在尝试:

In this function, I am trying to:

function test($string){
  $title = 'please print';
  echo $string;
}
//I want the outcome to be <div>please print</div>

这似乎是最愚蠢的事情，但是对于我一生来说，我无法用它来解释"变量.

This seems like the silliest thing, but for the life of me, I cannot get it to "interpret" the variables.

我也尝试过

echo html_entity_decode($string);
echo bin2hex(html_entity_decode($string)); //Just to see what php was actually seeing I thought maybe the $ had a slash on it or something.

当我的心思不停地使用EVAL()时，我决定在此发布.

I decided to post on here when my mind kept drifting to using EVAL().

当然，这只是伪代码.解决此问题的最佳方法是什么?

This is just pseudocode, of course. What is the best way to approach this?

答

我认为没有办法使它起作用.您正在尝试这样的事情:

I don't think there is a way to get that to work. You are trying something like this:

$var = "cute text";
echo 'this is $var';

单引号阻止解释器在字符串中查找变量.当您回显字符串变量时，情况也是如此.

The single quotes are preventing the interpreter from looking for variables in the string. And it is the same, when you echo a string variable.

解决方案将是简单的str_replace.

echo str_replace('$title', $title, $string);

但是在这种情况下，我确实建议您在文本中使用唯一的Template变量.

But in this case I really suggest Template variables that are unique in your text.

PHP使我远离eval;)字符串内的变量

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