fwrite
写入文件（可安全用于二进制文件）
简体中文
简体中文
<span class="token php language-php"><span class="token delimiter important"><?php</span> <span class="token variable">$file</span> <span class="token operator">=</span> <span class="token function">fopen</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"test.txt"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"w"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">echo</span> <span class="token function">fwrite</span><span class="token punctuation">(</span><span class="token variable">$file</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"Hello World. Testing!"</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：
21
