php $_POST to get html form data tutorial_PHP tutorial-PHP Tutorial-php.cn

The $_POST variable is used to collect values from the form with method="post". Information sent from a form with the POST method is invisible to anyone (it does not appear in the browser's address bar), and there is no limit on the amount of information sent.

Let’s look at the simplest example first

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If I enter hello,

post.php file code is as follows

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You are .

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You are .

The output result is

You are Hello

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So how do you get a post like a radio button? An example is as follows

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radiopost.php file

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In this way, if you choose which one, all the values of that one will be output. It will be different for checkbox. You can pay attention to this. Click

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Apple Orange Mango

checkboxpost.php文件

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print_r($_POST['abcde']);

print_r($_POST['abcde']);

The output is in the form of an array

Note:
Variables sent via HTTP POST will not be displayed in the URL.
There is no length limit for variables.

$_POST and php://input can get the value, $HTTP_RAW_POST_DATA is empty
$_POST organizes the submitted data in an associative array, and performs encoding processing on it, such as urldecode, and even encoding conversion .
php://input can obtain unprocessed POST raw data through file reading through the input stream

php://input allows reading POST raw data. It puts less pressure on memory than $HTTP_RAW_POST_DATA and does not require any special php.ini settings. php://input cannot be used with enctype="multipart/form-data".
Expand the post simulation method here

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$flag = 0; '=>'You Okay'); .= "&";                                                                                         g = 1;
} or exit ($errstr."--->".$errno);                                                                                                                         .= "Host:127.0.0.1";
$header .= "Referer:/mobile/sendpost.php";
$header .= "Content-Type: application/x-www-form-urlencoded" ; = $params.""; "
" //Send post data $ Line = fgets ($ fp, 1024); // Remove the header of the request package only display the return data of the page
IF ($ inheader && ($ line == "n" || $ line == "" "" "" )) { echo $line;
}}

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