Application of PHP array grouping function in academic research

PHP array grouping function array_group_by() is widely used in academic research. It allows researchers to group data according to specified keys or functions, thereby facilitating the grouping and analysis of large data sets. Through the case demonstration, we can easily group the paper data by author to study the contribution of each author.

Application of PHP array grouping functions in academic research

Introduction

In academic research, large amounts of data often need to be grouped and analyzed. PHP array grouping functions provide powerful features that help researchers handle such tasks quickly and easily.

Array grouping function

PHP provides the array_group_by() function, which is used to group array elements according to specified keys or closure functions. The syntax is as follows:

array array_group_by(array $array, mixed $key_or_callback)

Practical case: grouping papers according to authors

Suppose we have a set of paper data, where each paper has the following fields:

• Author
• Title
• Abstract

We can use the array_group_by() function to group papers by authors in order to analyze the contribution of each author. The following code demonstrates how to do this:

$papers = [
    [
        'author' => 'John Doe',

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