php 計算多維數組中所有值的總和

php 內建函數 array_sum() 函數傳回數組中所有值的總和，只能傳回一維數組的總和；

計算多維數組所有值的和就要自訂函數了；

<span>1</span><span>function</span> get_sum(<span>$array</span><span>) {
</span><span>2</span><span>$num</span> = 0<span>;
</span><span>3</span><span>foreach</span>(<span>$array</span><span>as</span><span>$k</span> => <span>$v</span><span>) {
</span><span>4</span><span>if</span>(<span>is_array</span>(<span>$v</span><span>)) {
</span><span>5</span><span>$num</span> += get_sum(<span>$v</span><span>);
</span><span>6</span><span>        }
</span><span>7</span><span>    }
</span><span>8</span><span>return</span><span>$num</span> + <span>array_sum</span>(<span>$array</span><span>);
</span><span>9</span> }<br><span>10</span> get_sum($array);

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