Analysis of the specific meaning of PHP external variables_PHP tutorial

For newcomers to the PHP language, their understanding of variables is still relatively vague. I hope that through this article you can have a detailed understanding of PHP external variables and deepen your understanding of the PHP language.

PHP external variable example code:

1. < form action=”one.php”
2. method=”get”>
3. User:< input type=”text”
4. name=”username”>< br>
5. Password< input type=”password”
6. name=”pass”>< ; br>
7. < input type=”submit” values ​​“OK”>
8. < /form>

<ol class="dp-xml"><li class="alt"><span><span class="tag"><</span><span> ?php  </span></span></li><li><span>Echo &ldquo;user&rdquo;;  </span></li><li class="alt"><span>Echo $_get[&ldquo;username&rdquo;];  </span></li><li><span class="tag">?></span><span> </span></span></li></ol>

$_get can only accept the data sent back by the get method

$_post can only accept the data sent back by the post method

$ _request can accept data sent back by all methods

or it can be passed directly. PHP external variables are separated by &.

hello This is equivalent to the get method passing.

It is best to use $_get or $_request to receive.

There are other PHP external variables

$_files

$_cookie

$_session

The PHP external variables passed can be used directly on this page.

http://www.bkjia.com/PHPjc/446201.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/446201.htmlTechArticleFor newcomers to the PHP language, the understanding of variables is still relatively vague. I hope that through this article you can have a detailed understanding of PHP external variables and deepen your understanding of the PHP language...