php不同数组相同键值求和

如题所述

<?php
$arr1 = array('key1' => 1, 'key2' => 2);
$arr2 = array('key1' => 2, 'key2' => 3);

$sums = array();
foreach($arr1 as $key => $val){
$sums[$key] = $val + $arr2[$key];
}
echo "<pre>";
print_r($sums);
echo "</pre>";
?>
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