Ask the cow to help, how does the PHP statement in the field execute?

Ask the cow to help, how to execute the PHP statement in the field?
This post was last edited by wanmei12112121 on 2014-06-09 13:12:31

RT, the actual environment is a PHP Web page, by querying the database to get a field of $ A,
But within $ A is actually a line of PHP statements, for example
How to make
$a shown as OK
And not what?

I wonder if the boss knows what I mean.
------Solution--------------------

$a = "
 
  ";
Eval ("?> $a"); Ok

Another situation

$a = "echo ' OK ';";
eval ($a); Ok

