Is there a way to turn a string into a function during runtime?

Question

say I had this

$src = "function($message) { echo $message; }"

I'm looking for a way to turn the source as a string into an actual function during runtime, sorta like

$say_message = magic_command($src);
$say_message("hello");

but I haven't found a way to do it.

If you're pondering the purpose, I'm extracting data from a large string. To make it simpler to change the procedure, I created an intermediary language(regex really won't do here) which I'm just eval'ing right now. I figured turning the procedure into a php native function might speed up the processing.. worth a shot. Security is not a concern, I'm the only one using this.

eval() would the function you are looking for: php.net/manual/en/function.eval.php — Terry
– Terry, Commented Oct 23, 2016 at 0:21

Sam · Accepted Answer · 2016-10-23 00:30:03Z

1

$src = '$say_message = function($message) { echo $message; };';
eval($src);
$say_message("hello");

This is the actual way to get $say_message to work as a function through string, you have to use eval(), make sure you add the proper ; in the code

There is also another way to create it but not from a single string, using create_function()

$say_message = create_function('$message','echo $message;');
$say_message("hello");

answered Oct 23, 2016 at 0:30

Sam

2,9701 gold badge20 silver badges26 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Is there a way to turn a string into a function during runtime?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related