PHP calculates the sum of all values ​​in a multidimensional array, multidimensional array_PHP tutorial

php calculates the sum of all values ​​in a multi-dimensional array, multi-dimensional array

php built-in function array_sum() function returns the sum of all values ​​in the array, and can only return the sum of one-dimensional arrays ;

To calculate the sum of all values ​​in a multi-dimensional array, you need to customize a function;

<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);

<span> </span>

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