How to calculate the product and sum of php arrays

How to calculate the product and sum of PHP arrays: 1. Use array_product() to calculate the product of all elements in the array, the syntax is "array_product($arr)"; 2. Use array_sum() to calculate The sum of all elements of an array, syntax "array_sum($arr)".

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

php array calculation product and summation methods

PHP has two built-in functions that can calculate array products and sums. Let’s take a look.

1. Use the array_product() function to calculate the array product

array_product() function is used to calculate the product of all elements in the array

array_product ($arr)

• If all elements of array arr are integers, return an integer value; if one or more of the values ​​are floating point numbers, return a floating point number.

• If there are non-numeric elements in the array arr, PHP will try to convert them to a numeric value, and if the conversion fails, it will be treated as a 0 value. For example, the string "29.5" will be converted to the decimal 29.5, and the string "100abc" will be converted to the integer 100.

Example:

<?php
$a = array(2, 3, 10, 15);
echo array_product($a) . "<br />";
$b = array(2, 5.5, "10abc", "3.3");
echo array_product($b) . "<br />";
$c = array(4, 3.5, "0.1", "hello");
echo array_product($c);
?>

2. Use array_sum() to implement array summation

array_sum() function is used to calculate the sum of all elements in an array. Its syntax is as follows:

array_sum ( $arr )

• If all elements of array arr are integers, return an integer value; if If one or more of the values ​​is a floating point number, a floating point number is returned.

• If there are non-numeric elements in the array arr, PHP will try to convert them to a numeric value, and if the conversion fails, it will be treated as a 0 value. For example, the string "45" will be converted to the integer 45, and the string "12.4abc" will be converted to the decimal 12.4.

Example:

<?php
$a = array(4, 2, 3, 10);
echo array_sum($a) . "<br />";
$b = array("10.1xy", 100, &#39;1&#39;, "0.01");
echo array_sum($b);
?>

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