如何使用条件循环多维数组并将其计入另一个Wordpress页面

Question

I have an array of database from a Wordpress page:

dev-user-20190424.php

<?php
$wb_users = array(
    array(

        "Username" => "Azmina",
        "Level" => "form-5",
        "School" => "KOLEJ D PATINGGI ABANG HJ ABDILLAH, SARAWAK",
        "SchoolID" => 4522,

    ),
    array(

        "Username" => "Gudako",
        "Level" => "form-5",
        "School" => "KOLEJ D PATINGGI ABANG HJ ABDILLAH, SARAWAK",
        "SchoolID" => 4522,

    ),
        array(

        "Username" => "Takatosaijo29",
        "Level" => "form-5",
        "School" => "SEKOLAH MENENGAH KEBANGSAAN BAHANG, SABAH",
        "SchoolID" => 4210,

    ),
    array(

        "Username" => "Obon",
        "Level" => "form-5",
        "School" => "SEKOLAH MENENGAH KEBANGSAAN BAHANG, SABAH",
        "SchoolID" => 4210,

    ),
    array(

        "Username" => "Rayana12",
        "Level" => "form-5",
        "School" => "SEKOLAH MENENGAH KEBANGSAAN BAHANG, SABAH",
        "SchoolID" => 4210,

    ),
    array(

        "Username" => "kaiyuanbeh",
        "Level" => "form-5",
        "School" => "SEKOLAH MENENGAH KEBANGSAAN PERMATANG RAWA, PULAU PINANG",
        "SchoolID" => 4250,

    ),
    array(

        "Username" => "Divyabharthi",
        "Level" => "form-5",
        "School" => "SEKOLAH MENENGAH KEBANGSAAN PETALING, WP KL",
        "SchoolID" => 4244,
    ),
    array(

        "Username" => "blackchocolatecake",
        "Level" => "form-4",
        "School" => "SEKOLAH MENENGAH KEBANGSAAN POI LAM, PERAK",
        "SchoolID" => 4375,

    ),
    );

So what I am trying to achieve is to display the total number of users on another WordPress page by looping the array $wb-users and if SchoolID is matched current user school id variable, then count it. Then the total number of users will be displayed on the page.

Answer 1

I believe this is basically what you are looking for.

$schoolID = 4522;
$studentTotal = 0;
for ($i = 0; $i < count($wb_users); $i++) {
    if ($wb_users[$i]['SchoolID'] === $schoolID) {
        $studentTotal++;
    }
}

You need to 1. Loop through the arrays within the main array. 2. Compare the 'SchoolID' key with your school ID variable. 3. Increment the counter when there is a match.