How to Use feof with ob_flush and flush Functions for Chunked Output of Large Files

<span><span><span class="hljs-meta"><?php</span></span><span>
</span><span><span class="hljs-comment">// The following part is unrelated to the article content, just sample prelude code</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"<!-- Page Start -->\n"</span></span><span>
</span><span><span class="hljs-title function_ invoke__">date_default_timezone_set</span></span><span>(</span><span><span class="hljs-string">'Asia/Shanghai'</span></span><span>);
</span><span><span class="hljs-title function_ invoke__">ob_start</span></span><span>();
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<p></span><?php<br>
// Article content starts<br>
echo "<h1>How to Use feof with ob_flush and flush Functions for Chunked Output of Large Files</h1>"</p>
<p>echo "<p>When handling large file downloads or generating large file content, outputting the entire file to the browser at once may cause PHP memory overflow or long page loading times. To avoid this, you can use chunked output, which outputs a portion of the content at a time and flushes the buffer so the browser receives data progressively.</p>"</p>
<p>echo "<h2>Key Function Explanation</h2>"<br>
echo "<ul>"<br>
echo "<li><strong>feof(resource $handle)</strong>: Checks whether the file pointer has reached the end of the file. Returns true if it has, otherwise false.</li>"<br>
echo "<li><strong>ob_flush()</strong>: Sends the contents of PHP's output buffer to the browser and clears the buffer (requires output buffering to be enabled).</li>"<br>
echo "<li><strong>flush()</strong>: Forces the server buffer to send content to the browser immediately, so output is displayed without delay.</li>"<br>
echo "</ul>"</p>
<p>echo "<h2>Implementation Approach</h2>"<br>
echo "<ol>"<br>
echo "<li>Open the file to be output and check if successful.</li>"<br>
echo "<li>Read the file content in a loop, either line by line or in fixed byte chunks.</li>"<br>
echo <span><span class="hljs-string">"<li>After each read and output, call <code>ob_flush()