如何使用條件循環多維數組並將其計入另一個Wordpress頁面

Question

我有一個Wordpress頁面的數據庫數組：

DEV-用戶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,

    ),
    );

所以我想要實現的是通過循環數組$ wb-users顯示另一個WordPress頁面上的用戶總數，如果SchoolID與當前用戶學校id變量匹配，則計算它。 然后，頁面上將顯示總用戶數。

Answer 1

我相信這基本上就是你要找的東西。

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

您需要1.遍歷主陣列中的數組。 2.將“SchoolID”鍵與學校ID變量進行比較。 3.匹配時增加計數器。

Answer 2

使用array_count_values和array_column怎么array_column ？

$counts = array_count_values((array_column($wb_users, 'SchoolID')));
print_r($counts);

輸出：

Array( 
        [4522] => 2 
        [4210] => 3 
        [4250] => 1 
        [4244] => 1 
        [4375] => 1 
)

演示： https ： //3v4l.org/hCvq5