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This article mainly explains "php how to sum a column of multi-dimensional array". The content of the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "php how to sum a column of multi-dimensional array".

Summation method: 1, use array_column () to get a specified column of all the elements in the multi-dimensional array, syntax "rray_column (array, 'specify column name')", will return a result array containing all elements; 2, use "array_sum (result array)" to calculate the sum of all elements in the result array.

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Php's method of summing a column of a multidimensional array

In php, you can use array_column () and array_sum () to sum a column of a multidimensional array.

1. Use array_column () to get all the elements of a specified column

Array_column () returns the value of a single column in a specified array; it returns an array, and the array value is the value of the specified column.

2. Use array_sum () to sum the result array

The array_sum () function calculates the sum of all elements in a specified array.

Sum of days columns in echo "multidimensional array:" .array _ sum ($days)

Let's check it out with a calculator:

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