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PHP form form parameter passing details study_PHP tutorial

Jul 21, 2016 pm 03:45 PM

form get php post Why Woolen cloth and deal with how have of Research surface form

Why? Because there are two types of form processing: GET and POST, it has always been a very confusing question how to pass the do parameters in both forms and obtain them in the same way in the background. Today, after several hours of experimentation, I finally I understand, so I’m posting this.
GET form:

Copy code The code is as follows:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns ="http://www.w3.org/1999/xhtml"> 
<head> 
  <meta http-equiv="Content-Type" content="text/html;charset=gbk "/> 
 <title>The form uses the GET method to transfer values</title> 
</head> 
<body> 
 The value cannot be passed to action-get.php --> 
 <form action="action-get.php?parm=url-get" method="get"> 
 <p> ; 
                                                                                                                ​="hkey" value="hvalue" /> 
                                                                                                                                                                                            hidden" name="do" value="index" /> value="Submit"/> 
                                                                                                                              PHP for GET form: 



Copy code 

 The code is as follows: 


<pre> 

<?php
echo "The value of the parameter name is obtained through $_GET as ".$_GET["name"]." ,";
echo "The value of the parameter name is obtained through $_POST as ".$_POST["name"]. " ,";

echo "The value of parameter name is obtained through $_REQUEST as ".$_REQUEST["name"]." .rn"; echo "The value of parameter parm is obtained through $_GET as ".$ _GET["parm"]." ,"; echo "The value of parameter parm is obtained through $_POST as ".$_POST["parm"]." ,"; echo "The value of parameter parm is obtained through $ _REQUEST is obtained as ".$_REQUEST["parm"]." .rn"; echo "The value of parameter hkey is obtained through $_GET as ".$_GET["hkey"]." ,";

echo " "The value of parameter hkey is obtained through $_POST as ".$_POST["hkey"]." ,";

echo "The value of parameter hkey is obtained through $_REQUEST as ".$_REQUEST["hkey"]." . rn";
echo "The value of parameter do is obtained through $_GET as ".$_GET["do"]." ,";
echo "The value of parameter do is obtained through $_POST as ".$_POST[ "do"]." ,";
echo "The value of parameter do is obtained through $_REQUEST as ".$_REQUEST["do"]." .rn";
?>
</ pre>

Processing result output:

The value of parameter name is obtained as kj through $_GET, the value of parameter name is obtained as kj through $_POST, and the value of parameter name is obtained through $_REQUEST is obtained as kj.
The value of parameter parm is obtained through $_GET, the value of parameter parm is obtained through $_POST, and the value of parameter parm is obtained through $_REQUEST.
The value of parameter hkey is obtained through $_GET is hvalue, the value of parameter hkey is obtained through $_POST, and the value of parameter hkey is obtained through $_REQUEST as hvalue.
The value of parameter do is obtained as index through $_GET, and the value of parameter do is obtained through $_POST, parameter do The value is obtained as index through $_REQUEST.

POST form:

Copy code
The code is as follows:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional .dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
 <meta http-equiv="Content- Type" content="text/html;charset=gbk"/> 
 <title>The form uses POST to pass values</title> 
</head> 
<body> 
 <!-- The parm and do parameters in action can be obtained through $_GET in action-post.php--> 
 <form action="action-post.php?parm=url- post&do=index" method="post"> 
                                                                                                                                      Value--> 
                                                                                                                                                                                                                                                       >                                                                                             > 



Copy code

 The code is as follows:

<pre>
<?php echo "parameter The value of name is obtained through $_GET as ".$_GET["name"]." ,"; echo "The value of parameter name is obtained through $_POST as ".$_POST["name"]." ,";
echo "The value of the parameter name is obtained through $_REQUEST as ".$_REQUEST["name"]." .rn";

echo "The value of the parameter parm is obtained through $_GET as ".$_GET["parm "]." ,"; echo "The value of parameter parm is obtained through $_POST as ".$_POST["parm"]." ,"; echo "The value of parameter parm is obtained through $_REQUEST as" .$_REQUEST["parm"]." .rn"; echo "The value of parameter hkey is obtained through $_GET as ".$_GET["hkey"]." ,"; echo "The value of parameter hkey The value is obtained through $_POST as ".$_POST["hkey"]." ,";

echo "The value of parameter hkey is obtained through $_REQUEST as ".$_REQUEST["hkey"]." .rn";

echo "The value of the parameter do is obtained through $_GET as ".$_GET["do"]." ,";
echo "The value of the parameter do is obtained through $_POST as ".$_POST["do"] ." ,";
echo "The value of parameter do is obtained through $_REQUEST as ".$_REQUEST["do"]." .rn";
?>
</pre>

Processing result output:

The value of parameter name is obtained through $_GET, the value of parameter name is obtained as zkj through $_POST, and the value of parameter name is obtained through $_REQUEST. zkj.
The value of parameter parm is obtained as url-post through $_GET, the value of parameter parm is obtained as url-post through $_POST, and the value of parameter parm is obtained as url-post through $_REQUEST.
The value of parameter hkey is obtained through $ _GET is obtained as, the value of parameter hkey is obtained as hvalue through $_POST, and the value of parameter hkey is obtained as hvalue through $_REQUEST.
The value of parameter do is obtained as index through $_GET, and the value of parameter do is obtained through $_POST as, The value of the parameter do is obtained as index through $_REQUEST.
Conclusion:
The GET form value can be obtained through _GET; but the parameters set through the url parameter of the action cannot always be obtained
The POST form value can be obtained Obtained through _POST; but the parameters set through the url parameter of the action can be obtained through _GET
The same variables can be obtained through _GET, but they are set through hidden variables in the GET form, and through action in the POST form. url parameter settings
http://www.bkjia.com/PHPjc/320280.html

www.bkjia.com

true

http: //www.bkjia.com/PHPjc/320280.html

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Why? Because there are two types of form processing: GET and POST, it has been very confusing how to pass the do parameters in both forms and obtain them in the same way in the background...

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