<button class="btn btn-md btn-primary btn-block" id="btnLoadFile" name="submit" type="submit">Load File</button> </form> <div class="alert alert-info" id="fName"></div> <table class="table table-sm table-nonfluid center-table table-bordered"> <thead class="thead-inverse"> <tr> <th>State</th> <th>0</th> <th>1</th> </tr> </thead> <tbody> <?php if (isset($_POST['submit'])) { echo $objDFA->transitionToTr(); } ?> </tbody> </table> <form id="formInputString"> <div class="input-group"> <span class="input-group-addon" id="basic-addon3">Input string</span> <input type="text" class="form-control" id="inputString" aria-describedby="basic-addon3" /> </div> <div class="alert alert-info" id="outputDFA"> Type the input string on the textbox above </div> </form> </div>