Sending data from form to database

I don’t know why, but everything works fine on my local environment, but when i upload to D.O, my forms don’t seem to send data to my database. my connection is correct . is it because i tend to use action="<?php echo $_SERVER['PHP_SELF']?>" ? is there any alternative? i’m freaking out because i used throughout my whole project…

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  <form class="form awesome-form"  action="<?php echo $_SERVER['PHP_SELF']?>" method="post">
                   	<section class="form-group col-md-12">
					<input type="text" class="form-control" name="hostel-name" id="hostel-name" autocomplete="off"  required>
                    <label> Name</label>

					<section class="form-group col-md-12">
					<input type="email" class="form-control" name="email" id="email" autocomplete="off" required>

					<section class="form-group col-md-12">
					<input type="email" class="form-control" name="conf-email" id="conf-email" autocomplete="off"  required>
                    <label>Confirm Email</label>

					<section class="form-group col-md-12">
					<input type="password" class="form-control" name="password" id="password" autocomplete="off"  required>

                    <section class="form-group col-md-12">
                        <button class="form-control " name="register" id="register-btn" type="submit" ><span class="fa fa-paper-plane"> Sign Up</span></button>
                    <section class="form-group">
                        <ul class="list-inline" style="display: block;">
                            <li class="pull-left"> Have an Account?</li>
                            <li class="pull-right"><a href="login.php">Log in!</a></li>

for the insert script


 include 'database/connection.php';
 //new block added
 if($name="" or $email=="" || $password=="" || $confemail==""  ){echo '<p class="alert alert-danger text-center">Please Make Sure All Fields Are Filled <span class="close pull-right"><span class="close pull-right"> <a href="#" >&times;</a></span></p>';}

   $query=$dbc->query("select email from users where email='$email'");

 if($result=$query->fetch(PDO::FETCH_NUM)!=0){ echo '
<p class="alert alert-danger text-center">We already have someone with that email <span class="close pull-right"><span class="close pull-right"> <a href="#" >&times;</a></span></p>'; }elseif($result=$query->fetch(PDO::FETCH_NUM)==0){ 
  $data_result=$dbc->query("insert into users(hostel_name,email,password,confirm_code,user_id) values('$hostel_name','$email','$password','$confirm_code','$user_id')");


       echo '<p class="alert alert-success text-center error-message"> You\'re almost there!  Check your inbox to activate your account.</p>';


echo '<p class="alert alert-danger text-center error-message">Something is not right <span class="pull-right close"> <a href="#" >&times;</a></span></p>';}



i know am exposed to sql injection but i just want to see the data inserted first

Can you share the rest of your script? The first step in debugging this type of issue would be to look for anything recorded in your error log /var/log/apache2/error.log

Using this environment variable to set the form target shouldn’t be a problem as long as php is functioning properly.