fflush
將緩衝內容輸出到文件
						<span class="token php language-php"><span class="token delimiter important"><?php</span> file <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">// 一些代碼</span> <span class="token function">fflush</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>