Home Backend Development PHP Tutorial #php学习札记#基本语法

#php学习札记#基本语法

Jun 13, 2016 am 11:03 AM
echo gt lt php print

#php学习笔记#--基本语法

一、从HTML中分离

? ? ? ? 当 PHP 解析一个文件时,会寻找开始和结束标记,标记告诉 PHP 开始和停止解释其中的代码。此种方式的解析可以 ? ?使 PHP 嵌入到各种不同的文档中,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。大多数情况下 PHP ? ?都是嵌入在 HTML 文档中的。

?

<p>a</p><?php echo 'b';?><p>c</p>
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?

? ?当然还可以嵌入一大段PHP代码

?

<?php	if(1 == true){		echo '<p>This is True.</p>';	}else{		echo '<p>This is False.</p>';	}?>
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?

? ?还可以把echo,print,print_r之类的输出简写成=

<p>a</p><p><?='b'?></p><p>c</p>
Copy after login
?

二、指令分隔符

? ? PHP和大部分语言一样,每一句话结束都需要用“;”告诉解析器我执行结束了

三、注释

? ? PHP支持多种注释格式

? ? ? ? 如C++风格的“//注释内容”

? ? ? ? 如C风格的“/*注释内容*/”

? ? ? ? 如Shell风格的“#注释内容”

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