如何比较两个文件差异 diff命令逐行对比输出解读

<p>比较两个文件差异的核心是使用diff命令并理解其输出格式，首先通过diff file1 file2逐行对比，输出中3c3表示第3行被修改（c代表change），5a6表示在file1第5行后添加一行（a代表add），7d7表示file1的第7行被删除（d代表delete）；其次为提升可读性，可使用-u选项生成带上下文的统一格式输出，-y选项实现并排显示差异，或使用colordiff实现彩色高亮；最后可通过-b忽略空格变化，-w忽略所有空格，-b忽略空行，从而聚焦实质性内容差异，掌握这些方法能有效提升文件比较效率，完整结束。</p> <p><img src="https://img.php.cn/upload/article/000/969/633/175550215152797.jpg" alt="如何比较两个文件差异 diff命令逐行对比输出解读"></p> <p>比较两个文件的差异，核心在于使用<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">diff</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>命令，它会逐行分析并告诉你哪里不一样。但光知道命令还不够，理解输出结果才是关键。</p> <p>解决方案：</p> <p><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">diff</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>命令的基本用法是：<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">diff file1 file2</pre><div class="contentsignin">登录后复制</div></div>。它会比较<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">file1</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>和<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">file2</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>，然后输出差异之处。这个输出结果乍一看有点吓人，但其实很有规律。</p> <p>比如说，你可能会看到这样的输出：</p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>3c3 < This is line 3 in file1 --- > This is line 3 in file2</pre><div class="contentsignin">登录后复制</div></div><p>这表示<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">file1</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>的第3行和<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">file2</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>的第3行不同。<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">3c3</pre><div class="contentsignin">登录后复制</div></div>中的<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">c</pre><div class="contentsignin">登录后复制</div></div>代表"change"，也就是修改。<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false"><</pre><div class="contentsignin">登录后复制</div></div>表示后面跟着的是<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">file1</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>的内容，<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">></pre><div class="contentsignin">登录后复制</div></div>表示后面跟着的是<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">file2</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>的内容。</p> <p>再比如：</p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>5a6 > This is a new line in file2</pre><div class="contentsignin">登录后复制</div></div><p>这里的<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">a</pre><div class="contentsignin">登录后复制</div></div>代表"add"，也就是添加。这表示在<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">file1</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>的第5行之后，<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">file2</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>添加了一行内容。</p> <p>或者：</p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>7d7 < This line exists only in file1</pre><div class="contentsignin">登录后复制</div></div><p>这里的<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">d</pre><div class="contentsignin">登录后复制</div></div>代表"delete"，也就是删除。这表示<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">file1</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>的第7行在<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">file2</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>中被删除了。</p> <p>理解了这些符号，就能轻松看懂<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">diff</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>的输出了。但要注意，<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">diff</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>默认只显示简单的差异。如果文件很大，差异很多，输出会很长。</p> <p>如何更清晰地查看diff结果？</p> <p>除了基本的<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">diff</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>命令，还可以使用一些选项来改善输出的可读性。</p> <ul> <li> <p><strong><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">-u</pre><div class="contentsignin">登录后复制</div></div> 或 <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">--unified</pre><div class="contentsignin">登录后复制</div></div>：</strong> 生成统一的diff格式。这种格式更易于阅读，因为它会显示差异行周围的上下文。例如：</p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>diff -u file1 file2</pre><div class="contentsignin">登录后复制</div></div><p>输出会包含<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">--- file1</pre><div class="contentsignin">登录后复制</div></div>和<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">+++ file2</pre><div class="contentsignin">登录后复制</div></div>这样的头部信息，以及<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">@@ -行号,范围 +行号,范围 @@</pre><div class="contentsignin">登录后复制</div></div>这样的块头，表示差异的起始行和范围。<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">+</pre><div class="contentsignin">登录后复制</div></div>表示添加的行，<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">-</pre><div class="contentsignin">登录后复制</div></div>表示删除的行，没有符号的行表示没有变化的上下文。</p> </li> <li> <p><strong><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">-y</pre><div class="contentsignin">登录后复制</div></div> 或 <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">--side-by-side</pre><div class="contentsignin">登录后复制</div></div>：</strong> 将两个文件并排显示，用竖线标记差异。这种方式更直观，但如果行太长可能会超出屏幕。</p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>diff -y file1 file2</pre><div class="contentsignin">登录后复制</div></div></li> <li> <p><strong><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">colordiff</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>：</strong> 如果你的<a style="color:#f60; text-decoration:underline;" title="系统安装" href="https://www.php.cn/zt/43905.html" target="_blank">系统安装</a>了<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">colordiff</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>，可以使用它来彩色显示<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">diff</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>的输出，更加醒目。</p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>colordiff file1 file2</pre><div class="contentsignin">登录后复制</div></div></li> </ul> <p>这些选项可以根据你的需求选择使用，让<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">diff</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>的输出更易于理解。有时候，<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">diff -u</pre><div class="contentsignin">登录后复制</div></div>配合<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">less</pre><div class="contentsignin">登录后复制</div></div>命令（<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">diff -u file1 file2 | less</pre><div class="contentsignin">登录后复制</div></div>）可以让你更方便地浏览大型diff文件。</p> <p>如何忽略文件中的空格或空行？</p> <p>在比较文件时，有时空格或空行的差异并不重要。<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">diff</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>命令提供了一些选项来忽略这些差异。</p> <ul> <li> <p><strong><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">-b</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div> 或 <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">--ignore-space-change</pre><div class="contentsignin">登录后复制</div></div>：</strong> 忽略空格数量的变化。这意味着连续的空格会被视为一个空格，行尾的空格会被忽略。</p><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>diff -b file1 file2</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div></li> <li> <p><strong><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">-w</pre><div class="contentsignin">登录后复制</div></div> 或 <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">--ignore-all-space</pre><div class="contentsignin">登录后复制</div></div>：</strong> 忽略所有空格。这意味着行中的所有空格都会被忽略，只比较非空白字符。</p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>diff -w file1 file2</pre><div class="contentsignin">登录后复制</div></div></li> <li> <p><strong><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">-b</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div> 或 <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">--ignore-blank-lines</pre><div class="contentsignin">登录后复制</div></div>：</strong> 忽略空行。这意味着只包含空格或制表符的行会被忽略。</p><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>diff -b file1 file2</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div></li> </ul> <p>这些选项可以帮助你过滤掉不重要的差异，更专注于实质性的内容变化。例如，在比较代码文件时，忽略空格的变化可以让你更容易找到代码逻辑上的差异。</p> <p><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">diff</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>命令不仅仅是一个简单的文件比较<a style="color:#f60; text-decoration:underline;" title="工具" href="https://www.php.cn/zt/16887.html" target="_blank">工具</a>，它还是版本控制系统（如Git）的基础。理解<div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">diff</pre><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div><div class="contentsignin">登录后复制</div></div>的输出，可以帮助你更好地理解代码的修改历史，以及不同版本之间的差异。 掌握这些技巧，你就能像一位经验丰富的程序员一样，轻松驾驭文件比较的艺术。</p>

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