vb.org Archive - How do I explode, do something, implode?

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- - How do I explode, do something, implode? (https://vborg.vbsupport.ru/showthread.php?t=41277)

JJR512

07-19-2002 11:26 PM

How do I explode, do something, implode?

Let's say I have an array:

$array = "50,60,70,80,90";

And I want to take each element of the array and do something with it. The specific something is a mathmatical operation; let's say I want to subtract 10 from each number. Then, after subracting 10 from each number, I want so put all the results back into a new array. The new array would look like "40,50,60,70,80".

How do I write this?

I know to start with something like:

$exploded_array = explode(",",$array)

But where do I go from there? (And in the explode(), does $array need to be enclosed in quotes or not?)

Admin

07-20-2002 06:16 AM

PHP Code:


		
			
function subtract(&$value) {

    $value -= 10;

}



$string = '50,60,70,80,90';

$array = explode(',', $string);

array_walk($array, 'subtract');

$string = implode(',', $array);

You can also use foreach, like this:

PHP Code:


		
			
$string = '50,60,70,80,90';

$array = explode(',', $string);

foreach ($array as $key => $value) {

    $array[$key] -= 10;

}

$string = implode(',', $array);

But I think the first method is more elegant. :)

Neo	07-20-2002 06:24 AM

Chen I forget but why do you add a & to the front of a variable in certain cases?

JJR512

07-20-2002 06:28 AM

Thanks!

Admin

07-20-2002 06:54 AM

Quote:

Originally posted by Neo
Chen I forget but why do you add a & to the front of a variable in certain cases?

I can't explain the whole thing in a post, read this:
http://php.fastmirror.com/manual/en/...references.php

Neo	07-20-2002 08:25 AM

Thanks for the help as always.

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