Fun with Array's...

[frio80]

I have an array:

[letter] = An Array:

    [96-19205] = '1'

    [97-19205] = '2'

[envel] = An Array:

    [96-19205] = '3'

    [97-19205] = '4'

 

I would like the result to read:

[papers] (the name isn't very important)

    [96-19205] = '4'

    [97-19205] = '6'

 

Seems simple enough but just trying to figure out a more efficient method (using built-in array functions) rather than looping and looking for matches manually?  Any thoughts?  Thanks.

[AbydosGater]

What exactly is it that you are asking?

[frio80]

Sorry for that lousy explanation.  Let me try again.

 

I would like to merge the arrays and add the values of the duplicates together.  The array structure is:

[<name>]

    [item#] = <quantity>

    ...

 

So I have these two arrays named letter and evel

[letter] = An Array:

    [96-19205] = '1'

    [97-19205] = '2'

    [98-12222] = '9'

    ...

[envel] = An Array:

    [96-19205] = '3'

    [97-19205] = '4'

    [92-11231] = '3'

 

I would like the resulting merged array to read:

[papers]

    [96-19205] = '4'

    [97-19205] = '6'

    [92-11231] = '3'

    [98-12222] = '9'

 

Thanks!

[effigy]

<pre>
<?php

function sum_array_keys () {
	$result = array();
	$arrays = func_get_args();
	foreach ($arrays as $array) {
		foreach ($array as $k => $v) {
			$result[$k] += $v;
		}
	}
	return $result;
}

$letter = array(
	'96-19205' => 1,
	'97-19205' => 2,
	'98-12222' => 9,
);
$envel = array(
	'96-19205' => 3,
	'97-19205' => 4,
	'92-11231' => 3,
);

$result = sum_array_keys(&$letter, &$envel);
print_r($result);

?>
</pre>

[Barand]

To avoid warning messages it's safer to

 

        if (isset($result[$k])) {
            $result[$k] += $v;
        }
        else $result[$k] = $v;