回答編集履歴
1
追記
answer
CHANGED
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@@ -27,5 +27,36 @@
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27
27
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}
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28
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29
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var_dump(arraySum($array));
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30
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```
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30
31
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32
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```php
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33
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<?php
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34
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35
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$array = array(
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36
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array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4),
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37
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array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan' => 8),
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array('red' => 4, 'blue' => 6, 'yellow' => 7, 'cyan' => 8),
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39
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array('green' => 5, 'green' => 6, 'yellow' => 7, 'cyan' => 3),
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40
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array('green' => 5, 'blue' => 6, 'green' => 7, 'cyan' => 5)
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);
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function arraySum(array $arr)
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{
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$res = [];
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if (!is_array($arr)) {
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return;
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48
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}
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foreach ($arr as $val) {
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foreach ($val as $k => $v) {
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if (!isset($res[$k])) {
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$res[$k] = 0;
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}
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$res[$k] += $v;
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}
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}
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return $res;
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}
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60
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var_dump(arraySum($array));
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61
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31
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```
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