i have two arrays like
$a1 $b1
0 : A 10
1: B 10
2: A 15
3: A 20
4: B 05
5: c 25
now i want to calculate them in same way then result is A=45, B=15 and C=25
$calc = array_fill_keys($a1,0);
foreach($a1 as $i => $key) {
$calc[$key] += $b1[$i];
}
$calc is array of calculated values:
[A] => 45,
[B] => 15
etc.
$calc = array_fill_keys($a1,0) to remove the warnings
echo "<table>"; foreach($calc as $key=>$value) { echo "<tr><td>{$key}</td><td>{$value}</td></tr>"; } echo "</table>";I know it's already been answered and accepted, and the accepted answer is a lot simpler and more efficient; but purely because I was tempted to try a rather different approach:
$a1 = array('A', 'B', 'A', 'A', 'B', 'c');
$b1 = array('10','10','15','20','05','25');
$sumArray = array();
foreach(array_unique($a1) as $key) {
$arrayElements = array_filter(
$a1,
function($value) use ($key) {
return $value == $key;
}
);
$sumArray[$key] = array_sum(
array_intersect_key(
$b1,
array_fill_keys(
array_keys($arrayElements),
NULL
)
)
);
}
var_dump($sumArray);
