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ftp_fput 与 ftp_put 的区别与选择：哪个更适合你的需求？

gitbox 2025-09-15 
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<h1>ftp_fput 与 ftp_put 的区别与选择：哪个更适合你的需求？</h1>

<p>在 PHP 中操作 FTP 文件时，常常会遇到 <code>ftp_put

可以看出，主要区别在于第三个参数：ftp_put接收文件路径，而ftp_fput接收文件句柄。

3. 使用场景

  • ftp_put：适用于文件已经存在于磁盘上，直接上传完整文件的场景。代码简单，使用方便。
  • ftp_fput：适用于需要对文件内容进行动态处理或者生成文件内容后再上传的场景。例如，你可能希望在上传之前对数据进行压缩、加密或者从内存中生成内容而不存储在磁盘上。

4. 性能与内存考虑

如果文件很大：

  • 使用 ftp_put 会直接读取整个文件，可能消耗较多内存。
  • 使用 ftp_fput 可以通过流式处理文件内容，逐块读取上传，内存占用更小。

5. 示例代码

ftp_put 示例

</span><span><span>$ftp</span></span><span> = </span><span><span class="function_ invoke__">ftp_connect</span></span><span>(</span><span><span>"ftp.example.com"</span></span><span>);
</span><span><span class="function_ invoke__">ftp_login</span></span><span>(</span><span><span>$ftp</span></span><span>, </span><span><span>"username"</span></span><span>, </span><span><span>"password"</span></span><span>);

</span><span><span>$localFile</span></span><span> = </span><span><span>"local.txt"</span></span><span>;
</span><span><span>$remoteFile</span></span><span> = </span><span><span>"remote.txt"</span></span><span>;

</span><span><span>if</span></span><span> (</span><span><span class="function_ invoke__">ftp_put</span></span><span>(</span><span><span>$ftp</span></span><span>, </span><span><span>$remoteFile</span></span><span>, </span><span><span>$localFile</span></span><span>, FTP_BINARY)) {
    </span><span><span>echo</span></span><span> </span><span><span>"文件上传成功！"</span></span><span>;
} </span><span><span>else</span></span><span> {
    </span><span><span>echo</span></span><span> </span><span><span>"文件上传失败！"</span></span><span>;
}

</span><span><span class="function_ invoke__">ftp_close</span></span><span>(</span><span><span>$ftp</span></span><span>);

ftp_fput 示例

</span><span><span>$ftp</span></span><span> = </span><span><span class="function_ invoke__">ftp_connect</span></span><span>(</span><span><span>"ftp.example.com"</span></span><span>);
</span><span><span class="function_ invoke__">ftp_login</span></span><span>(</span><span><span>$ftp</span></span><span>, </span><span><span>"username"</span></span><span>, </span><span><span>"password"</span></span><span>);

</span><span><span>$localFile</span></span><span> = </span><span><span>"local.txt"</span></span><span>;
</span><span><span>$handle</span></span><span> = </span><span><span class="function_ invoke__">fopen</span></span><span>(</span><span><span>$localFile</span></span><span>, </span><span><span>"r"</span></span><span>);
</span><span><span>$remoteFile</span></span><span> = </span><span><span>"remote.txt"</span></span><span>;

</span><span><span>if</span></span><span> (</span><span><span class="function_ invoke__">ftp_fput</span></span><span>(</span><span><span>$ftp</span></span><span>, </span><span><span>$remoteFile</span></span><span>, </span><span><span>$handle</span></span><span>, FTP_BINARY)) {
    </span><span><span>echo</span></span><span> </span><span><span>"文件上传成功！"</span></span><span>;
} </span><span><span>else</span></span><span> {
    </span><span><span>echo</span></span><span> </span><span><span>"文件上传失败！"</span></span><span>;
}

</span><span><span class="function_ invoke__">fclose</span></span><span>(</span><span><span>$handle</span></span><span>);
</span><span><span class="function_ invoke__">ftp_close</span></span><span>(</span><span><span>$ftp</span></span><span>);

6. 总结

简单来说：

  • 如果你有现成的文件，ftp_put 是最直接的选择。
  • 如果文件内容需要动态处理，或者希望更灵活地控制上传过程，ftp_fput 更合适。

理解两者的区别和适用场景可以帮助你在 PHP 开发中更高效地处理 FTP 上传任务。

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