有没有办法将文本文件保存在变量中？

# 打开文件并读取内容
with open('example.txt', 'r') as file:
    content = file.read()

# 现在变量content包含了文件的全部内容
print(content)

const fs = require('fs');

// 异步读取文件内容
fs.readFile('example.txt', 'utf8', (err, data) => {
    if (err) throw err;
    console.log(data);  // data变量包含了文件内容
});

// 或者使用同步方法
try {
    const content = fs.readFileSync('example.txt', 'utf8');
    console.log(content);
} catch (err) {
    console.error(err);
}

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class FileToString {
    public static void main(String[] args) {
        StringBuilder content = new StringBuilder();
        try (BufferedReader br = new BufferedReader(new FileReader("example.txt"))) {
            String line;
            while ((line = br.readLine()) != null) {
                content.append(line);
                content.append(System.lineSeparator());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        System.out.println(content.toString());
    }
}

using System;
using System.IO;

class Program
{
    static void Main()
    {
        string content;
        using (StreamReader reader = new StreamReader("example.txt"))
        {
            content = reader.ReadToEnd();
        }
        Console.WriteLine(content);
    }
}

<?php
$content = file_get_contents('example.txt');
echo $content;
?>

content = File.read('example.txt')
puts content