大家都知道从PHP简单程序范例中我们可以看出，PHP语言是嵌入在“”或“” 之间的部分。而这个程序最终结果将是：
Hello World!
但建议您使用 此种方式撰写您的程序，在php缺省的设定档php.ini中，通常此设定值为Off，若您有打开此设定的需要，您可以参见 php.ini 中关于 “short_open_tag = Off ”这部份的设定。
phpinfo
下面是一个在标准输出设备上输出关于PHP的设置的PHP简单程序范例, 如PHP变量, 模块：
<ol class="dp-xml"> <li class="alt"><span><span class="tag"><span> ?php </span></span></span></li> <li><span>phpinfo(); </span></li> <li class="alt"> <span class="tag">?></span><span> </span> </li> <li><span> </span></li> </ol>
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