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This article mainly explains the "php array how to remove the maximum and minimum values after the average", the article explains the content is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in-depth, together to study and learn "php array how to remove the maximum and minimum values after the average" it!

Methods: 1, sort the array in ascending order, and use "array_pop" and "array_shift" to remove the maximum and minimum values; 2, use "count" and "array_sum" to obtain the array length and element sum; 3, use "element and / array length" to calculate the average.

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

The method of finding the average after removing the maximum and minimum values of php Array

1. Remove the maximum and minimum values from the array

Use sort () to sort the array in ascending order

After sorting, the first element of the array is the minimum value, and the last element is the maximum value, which can be deleted using the array_pop () and array_shift () functions.

Array_pop (): deletes the last element in the array.

Array_shift (): deletes the first element in the array.

2. Statistics the array length and the sum of array elements after removing the maximum and minimum values.

Because the array_pop () and array_shift () functions modify the original array, you can simply use the count () function to get the length of the processed array.

$len=count ($arr); echo "the length of the processed array is:". $len

You can directly use array_sum () to get the sum of the array elements:

$sum=array_sum ($arr); echo "

The sum of the processed array elements is: ". $sum

3. Average: use "array elements and" divided by "array length"

$num=$sum/$len;echo "

The average is: ". $num

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