read text file and Identyfy variable and. get form.. after want edit

[rangamdu]

my text file is data.txt..

    # -------------------------------------------------
    SMTP_SERVER=Stemp.com
    SMTP_PORT=587
    SMTP_LOGIN=Rangamaddu.com
    SMTP_PWD= abc@123
    SMPT security type; Supported type: NO_SECURITY, USE_TLS, USE_SSL
    SMTP_SECURITY_TYPE=USE_TLS

I want to EDIT this file using form... example...

SMTP_SERVER get form filed and Semp.com must in text box..

after if I change to Stemp.com as Setup.com. and update text file....

please help me.. I don't want edit text field... edit.. I want each variable edit use form.. please.. I want php code

[Dormilich]

I want php code

$str = '';
foreach ($_POST as $key => $value) 
{
    $str .= $key . '=' . $value . PHP_EOL;
}
file_put_contents('data.txt', $str);

note: of course you need an appropriate form, but that wasn’t part of the question.

[rangamdu]

Thank You.. so much.... I'll use that...