[RESOLVED] How? Shorthand syntax for multiple steps for a single variable

[sherry]

Hello.

What is shorthand syntax for the following:

$var1 = operation#1 then
$var1 = operation#2 then
$var1 = operation#3 which is the final format or result to then use elsewhere

Thanks.

[laserlight]

Perhaps you should post valid PHP code so that we can better understand what shorthand you are looking for.

[sherry]

Thanks for your reply, laserlight.

This is more a general question.

I'll use an array as an example, but the principle would be for non-arrays, also.

Assume the original $POST var had to remain intact.

$Post_array_keys = array_keys($_POST);
$Post_array_keys = array_pop($Post_array_keys);
$Post_array_keys = array_flip($Post_array_keys);
$Post_array_keys = implode(', ', $Post_array_keys);

etc.

Thanks.

[laserlight]

It sounds like you are just asking about repeated function application that is effectively function composition, e.g.,

$Post_array_keys = implode(', ', array_flip(array_pop(array_keys($_POST))));

[sherry]

Thanks laserlight.

That's really cool. I tried it and it works great!

Maybe I can apply the same technique for non-arrays when I see the opportunity.

Thanks again.

[laserlight]

sherry wrote:

Maybe I can apply the same technique for non-arrays when I see the opportunity.

You can apply it any time the return value of one function call will be used as an argument (or to obtain an argument) for another function call. That said, you need to exercise some judgment because too deeply nested function calls can make the code harder to read.

[sherry]

Good point.

I'll mark this thread resolved, but if I run into a non-array case that is worth mentioning, I'll add it here.

Thanks again, laserlight!