从PHP函数返回数组只给出第一个元素

我试图用数据库中的部分动态填充我站点的管理页面

问题是我想把所有的部分都添加到数据库中，为了方便起见，我使用了一个函数

这段代码打印出第一个数组元素

functions.php

<?php
function fetchAdminSections ($user_id){
    global $pdo;

    $get_sections = $pdo->prepare("SELECT `id`, `section_name`, `section_description` FROM `administration_sections` WHERE `admin_added_this` = :admin");
    $get_sections->execute([
        ':admin' => $user_id
    ]);

    while ($row = $get_sections->fetch(PDO::FETCH_ASSOC)){
        $sections = [];

        $id = $row['id'];
        $name = $row['section_name'];
        $description = $row['section_description'];
        $sections[$id]['section_name'] = $name;
        $sections[$id]['section_description'] = $description;
        return $sections;
    }
}
?>

 <?php
    include 'functions.php';

    $elements = fetchAdminSections($user_id);
    print_r($elements);
 ?>

---

我得到的是：

Array ( [1] => Array ( [section_name] => test1 [section_description] => test ) )

只需在

中返回
$row
，而
会给我一个类似的结果：

Array ( [id] => 1 [section_name] => test1 [section_description] => test )


我想得到所有的部分，并循环通过它们
 您需要在循环外部定义数组，并在循环完成后返回

<?php
function fetchAdminSections ($user_id){
    global $pdo;

    $get_sections = $pdo->prepare("SELECT `id`, `section_name`, `section_description` FROM `administration_sections` WHERE `admin_added_this` = :admin");
    $get_sections->execute([
        ':admin' => $user_id
    ]);

    $sections = [];
    while ($row = $get_sections->fetch(PDO::FETCH_ASSOC)){

        $id = $row['id'];
        $name = $row['section_name'];
        $description = $row['section_description'];
        $sections[$id]['section_name'] = $name;
        $sections[$id]['section_description'] = $description;
    }

    return $sections;
}
?>

您需要将return语句放在while循环之外

按照现在的方式，它在第一次运行时从while循环返回。函数不能多次返回值。按如下方式编辑它：

$sections = [];
while ($row = $get_sections->fetch(PDO::FETCH_ASSOC)){
    $id = $row['id'];
    $name = $row['section_name'];
    $description = $row['section_description'];
    $sections[$id]['section_name'] = $name;
    $sections[$id]['section_description'] = $description;

}
return $sections;

移动
返回$sections循环后每次循环都会再次启动变量
$sections
，这意味着它会不断被覆盖。移动此行
$sections=[]循环外部。