Hello
Then again, your code still does not make sense to me ...
Fully understand :-)
Not want wasting your time with my specific situation... but there are
situation where it make sense :-)
For example... in my situation, i have time intensive (mathematically)
operations to do in pure php
and was searching a way to speed this operations up.
With PHP's eval() feature, creating php code at run time, this would be,
in my situation, a possible way.
Very simplified, i have to deal with the following:
function calculate($ints)
{
$result = 0;
for ($i=0; $i<10000000; ++$i) {
$result += $ints[0] + $ints[1] + $ints[2] + $ints[3] + $ints[4] +
$ints[5];
}
return $result;
}
$ints = array(1,2,3,4,5,6);
$result = calculate($ints);
A faster way would be:
$ints = array(1,2,3,4,5,6);
eval('$calculate = function () {
$result = 0;
for ($i=0; $i<10000000; ++$i) {
$result += '.$ints[0].' + '.$ints[1].' + '.$ints[2].' + '.$ints[3].' +
'.$ints[4].' + '.$ints[5].';
}
return $result;
};');
$result = $calculate();
The function code it self is in reality more complex and variable in the
function-body length, but the princip is the same.
The code-architecture, in my specific situation, requires also that the
operation encapsulated in a function.
(And for security: It is ensured that $int is an 1-dim array filled only
with integers)
$calculate() works very fine and, of course, much faster than the
hardcoded calculate().
Each time $ints is changing i also have, of course, re-define/creater
$calculate() via eval.
In such situations, for performance reasons, it would makes sense using
eval() for re/creating ano-functions, doesn't it?
And as long as the function-body has a fixed length each time re/creating
the ano-function via eval() it would also not let grow the memory endless.
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