fpassthru

名称:fpassthru

分类:文件系统

所属语言:php

一句话介绍:从打开的文件中读数据，直到 EOF，并向输出缓冲写结果。

实例

例子 1

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$file</span> <span class="token operator">=</span> <span class="token function">fopen</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"test.txt"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"r"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token comment">// 读取第一行</span>
<span class="token function">fgets</span><span class="token punctuation">(</span><span class="token variable">$file</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token comment">// 把文件的其余部分发送到输出缓存</span>
<span class="token keyword">echo</span> <span class="token function">fpassthru</span><span class="token punctuation">(</span><span class="token variable">$file</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token function">fclose</span><span class="token punctuation">(</span><span class="token variable">$file</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

输出：

There are three lines in this file.
This is the last line.59

注：59 指示被传递的字符数。

例子 2

转储 www 服务器的 index 页：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$file</span> <span class="token operator">=</span> <span class="token function">fopen</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"http://www.example.com"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"r"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">fpassthru</span><span class="token punctuation">(</span><span class="token variable">$file</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>