Create dynamic php function and run it later - Save it to a variable

问题

Im trying to make a function to run it later.

In php 5.3.2-1 it works fine. But in 5.1.6 it doesn't.

The code is:

$func = function(){                                                             
  echo "Hello!";                                                                
};                                                                              

echo "Before Hello";                                                            
$func();   

Does anyone knows how to emulate this in 5.1.6?

Thanks.

Eduardo

回答1:

Anonymous functions are available since PHP 5.3. You cannot use them in older versions. Take a look at the docs.

回答2:

$func = create_function('','echo "Hello!";');

echo "Before Hello";
$func();

to be able to "assign a function to a variable", while not delving into eval-ish code:

function my_not_so_anonymous_function1()
{
    echo "Hello!";
}
$func = 'my_not_so_anonymous_function1';

echo "Before Hello";
$func();

来源：https://stackoverflow.com/questions/4584419/create-dynamic-php-function-and-run-it-later-save-it-to-a-variable