I need to merge associative arrays and group by the name. Say I have such 3 arrays:
ARRAY1
\"/path/file.jpg\" => 2,
\"/path/file2.bmp\" => 1,
You can use a RecursiveArrayIterator
$iterator = new RecursiveIteratorIterator(new RecursiveArrayIterator($paths));
foreach ($iterator as $path => $value) {
$summed[$path] = isset($summed[$path]) ? $summed[$path] + $value : $value;
}
print_r($summed);
or array_walk_recursive
and a Closure
$summed = array();
array_walk_recursive($paths, function($value, $path) use (&$summed) {
$summed[$path] = isset($summed[$path]) ? $summed[$path] + $value : $value;
});
Both will give
Array
(
[/path/file.jpg] => 4
[/path/file2.bmp] => 3
[/file3.gif] => 5
)
[EDIT: I adapted the function (as suggested by John Green) to use func_get_args so you don't need to put all the seperate arrays in one array before you can use it.]
I think you could use the following function.
mergeArrays()
{
$return = array();
$arrays = func_get_args();
foreach ($arrays as $array) {
foreach ($array as $key => $val) {
if (array_key_exists($key, $array) {
$return[$key] += $val;
} else {
$return[$key] = $val;
}
}
}
return $return;
}
one possible way
$rtn = array();
foreach ($array1 as $key=>$val)
{
$rtn[$key]+=$val;
}
foreach ($array2 as $key=>$val)
{
$rtn[$key]+=$val;
}
foreach ($array2 as $key=>$val)
{
$rtn[$key]+=$val;
}
the above will assign the filename, SUM(val)
as an associative array into $rtn