PHP form submission form name containing a period (.) will be converted into an underscore (_)_PHP Tutorial

Recently, when I was working on a company project, I discovered a strange problem. When I submitted a normal form, I found that the submitted value could not be obtained normally. This discovery made me confused at first. At first, I thought it was me. There was a problem with the service and it could not be written to the database normally. Later, after detecting the SQL statement, it was found that the problem actually occurred in obtaining data, and the obtained data was all empty. Later, after debugging, it was discovered that all the variables submitted to the backend were , are no longer the expected variables, but have been converted by PHP.
The test code is provided as follows:

Copy the code The code is as follows:

Name:

Password:

QQ:
Address:

Phone:

Gender: MaleFemale

commit

if ($_POST) {
echo '

var_export($_POST); 
} 
?> 

Code Example 1
The result after running is as follows:

Figure 1
As you can see, all the . symbols I included in the control were converted into _underscores by the backend. In order to test some other symbols, I did the above Testing, so far, only found that the dot (.) will be converted into an underscore (_), so when I use info.name to access the backend, I can't find it because it has actually been converted into info_name. .

So when you use forms in the future, try not to use . in names.

http://www.bkjia.com/PHPjc/324665.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/324665.htmlTechArticleWhen I was working on a company project recently, I discovered a strange problem. I submitted a normal form, but found that it could not be obtained normally. To the submitted value, this discovery inevitably made me start...