## 从HTML中分离 凡是在一对开始和结束标记之外的内容都会被 PHP 解析器忽略，这使得 PHP 文件可以具备混合内容。 可以使 PHP 嵌入到 HTML 文档中去，如下例所示。 ``` <p>This is going to be ignored by PHP and displayed by the browser.</p> <?php echo "While this is going to be parsed."; ?> <p>This will also be ignored by PHP and displayed by the browser.</p> ``` 使用条件的高级分离 ``` <?php if ($expression == true): ?> This will show if the expression is true. <?php else: ?> Otherwise this will show. <?php endif; ?> ```