$array[0] = 100;
$array[1] = 10;
$array[2] = 15;
How can I get sum of array by its keys like key = (0,1) so the sum = 110 ?
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8 Answers
Try with:
$array = array(
0 => 100,
1 => 10,
2 => 15
);
$keys = array(0, 1);
$sum = 0;
foreach ( $keys as $key ) {
$sum += $array[$key];
}
1 Comment
KingCrunch
@DainisAbols As far as I can see it should work as expected. What are your concerns?
$sum = array_sum(
array_intersect_key($array, array_flip([0,1])
);
Didn't test it, but should work :)
Comments
$array[0] = 100;
$array[1] = 10;
$array[2] = 15;
$sum = function($keys = array(),$arrayList= array()) {
$s = 0;
foreach ($arrayList as $key => $value) {
if(in_array($key, $keys)) {
$s+= $value;
}
}
echo $s;
};
$sum(array(0,1),$array);
1 Comment
KingCrunch
Just curious: Why do you use an anonymous function here? As far as I can see you can completely omit it, rename some variable names (
$container (bad name anyway ;)) => $array to iterate over and $key must be set) and at the end simply echo $s.Try this
$array[0] = 100;
$array[1] = 10;
$array[2] = 15;
echo array_sum($array);
OR try this
$array[0] = 100;
$array[1] = 10;
$array[2] = 15;
$sum=0;
foreach (range(0,1) as $key)
{
$sum = $sum+$array[$key];
}
echo $sum;
Comments
Here is my solution to sum Arrays by defined keys:
$myArray=Array("Array Title","1000",2000,3000}; // array example with stings and integers
var_dump(array_intersect_key($myArray, array_flip(Array(1,2)))); // int(3000)
var_dump($myArray); // int(6000)
References:
Comments
if you want to sum intial two keys then use below code:
array_sum(array_slice($array,0,2)); // will return 110
References:
Comments
$count = 0;
for($i=0;$i<count($array);$i++){
$count = $count + $array[$i];
}
echo $count;
