写了2个函数，不明白我做错了什么

Question

我越来越多地练习 PHP，并且每天都在尝试执行函数以向它们学习。

昨天我写了 2 个函数，但它们完全不起作用，我正在寻找原因的帮助！

我的代码：

<?php

function getFilesAndContent($path)

{

    $data[] = $fileData;

    $folderContents = new DirectoryIterator($path);

    foreach ($folderContents as $fileInfo) {

        if ($fileInfo->isDot()) {

            continue;

        }

        $fileData = [

            'file_name' => $fileInfo->getBasename(),

        ];

        if ($fileInfo->getExtension()) {

            $fileData['contents'] = getFileContents($fileInfo->getPathname());

        }

        $data = $fileData;

    }

    return $data;

}

function getFileContents($path)

{

    $names = file_get_contents($fileInfo->getPathname());

    $names = implode("\n", $names);

    sort($names);

    $contents = '';

    foreach ($names as $name) {

        $contents += $name . ' (' . strlen($name) . ')<br>';

    }

    return $contents;

}

foreach (getFilesAndContent('.') as $data) {

    echo $data['file_name'];

    echo '<br>';

    echo $data['contents'];

    echo '<hr>';

}

免责声明：我真的很想让这两个功能正常工作，但我已经有了一个没有任何功能的工作替代方案（非常感谢！），这是我自己改进的学习机会，任何帮助将不胜感激！

Answer 1

你有几个问题。首先，$data = $fileData;应该是$data[] = $fileData;。添加[]意味着赋值在数组中创建一个新元素，而不是覆盖整个变量。当你在 的开头初始化变量时getFilesAndContent，它应该是$data = [];。第二，file_get_contents($fileInfo->getPathname())应该file_get_contents($path)。$fileInfo是 中的变量getFilesAndContent，不是getFileContents。第三，implode()应该explode()。implode连接数组以创建字符串，explode()将字符串拆分为数组。function getFilesAndContent($path){&nbsp; &nbsp; $data = [];&nbsp; &nbsp; $folderContents = new DirectoryIterator($path);&nbsp; &nbsp; foreach ($folderContents as $fileInfo) {&nbsp; &nbsp; &nbsp; &nbsp; if ($fileInfo->isDot()) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; continue;&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; $fileData = ['file_name' => $fileInfo->getBasename(),];&nbsp; &nbsp; &nbsp; &nbsp; if ($fileInfo->getExtension()) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $fileData['contents'] = getFileContents($fileInfo->getPathname());&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; $data[] = $fileData;&nbsp; &nbsp; }&nbsp; &nbsp; return $data;}function getFileContents($path){&nbsp; &nbsp; $names = file_get_contents($path);&nbsp; &nbsp; $names = explode("\n", $names);&nbsp; &nbsp; sort($names);&nbsp; &nbsp; $contents = '';&nbsp; &nbsp; foreach ($names as $name) {&nbsp; &nbsp; &nbsp; &nbsp; $contents += $name . ' (' . strlen($name) . ')<br>';&nbsp; &nbsp; }&nbsp; &nbsp; return $contents;}foreach (getFilesAndContent('.') as $data) {&nbsp; &nbsp; echo $data['file_name'];&nbsp; &nbsp; echo '<br>';&nbsp; &nbsp; echo $data['contents'];&nbsp; &nbsp; echo '<hr>';}