Using if isset POST submit to not display echo when script is open is not working

Question

I have a little problem with my if isset   POST  submit     code  What I want is some echos and a table to not appear when the script is open but I do want it to show when the submit button for the form has been clicked  The problem is though that when I include the if isset   POST  submit     function  when I click on the submit button it does not display the echos and the table at all  Why is this and can you help me out with this issue please   Below is the code        lt  DOCTYPE html PUBLIC  -  W3C  DTD XHTML 1 0 Transitional  EN   http   www w3 org TR xhtml1 DTD xhtml1-transitional dtd  gt   lt html xmlns  http   www w3 org 1999 xhtml  gt   lt head gt    lt title gt Exam Interface lt  title gt   lt meta http-equiv  Content-Type  content  text html  charset utf-8    gt   lt  head gt   lt body gt    lt p gt  lt strong gt NOTE   lt  strong gt If a search box is left blank  then the form will search for all data under that specific field lt  p gt    lt form action  exam interface php  method  post  name  sessionform  gt          lt  -- This will post the form to its own page -- gt   lt p gt Session ID   lt input type  text  name  sessionid    gt  lt  p gt        lt  -- Enter Session Id here-- gt   lt p gt Module Number   lt input type  text  name  moduleid    gt  lt  p gt        lt  -- Enter Module Id here-- gt   lt p gt Teacher Username   lt input type  text  name  teacherid    gt  lt  p gt        lt  -- Enter Teacher here-- gt   lt p gt Student Username   lt input type  text  name  studentid    gt  lt  p gt        lt  -- Enter User Id here-- gt   lt p gt Grade   lt input type  text  name  grade    gt  lt  p gt        lt  -- Enter Grade here-- gt   lt p gt Order Results By   lt select name  order  gt   lt option value  ordersessionid  gt Session ID lt  option gt   lt option value  ordermoduleid  gt Module Number lt  option gt   lt option value  orderteacherid  gt Teacher Username lt  option gt   lt option value  orderstudentid  gt Student Username lt  option gt   lt option value  ordergrade  gt Grade lt  option gt   lt  select gt   lt p gt  lt input type  submit  value  Submit    gt  lt  p gt   lt  form gt    lt  php   username  xxx    password  xxx    database  mobile app    mysql connect  localhost   username  password     mysql select db  database  or die  Unable to select database      sessionid   isset    POST  sessionid        POST  sessionid          moduleid   isset    POST  moduleid        POST  moduleid          teacherid   isset    POST  teacherid        POST  teacherid          studentid   isset    POST  studentid        POST  studentid          grade   isset    POST  grade        POST  grade          orderfield   isset    POST  order        POST  order           sessionid   mysql real escape string  sessionid    moduleid   mysql real escape string  moduleid    teacherid   mysql real escape string  teacherid    studentid   mysql real escape string  studentid    grade   mysql real escape string  grade    switch   orderfield        case  ordersessionid    orderfield    gr SessionId       break      case  ordermoduleid    orderfield    m ModuleId        break      case  orderteacherid    orderfield    s TeacherId       break      case  orderstudentid    orderfield    gr StudentId        break      case  ordergrade    orderfield    gr Grade       break      ordertable    orderfield    result   mysql query  SELECT   FROM Module m INNER JOIN Session s ON m ModuleId   s ModuleId JOIN Grade Report gr ON s SessionId   gr SessionId JOIN Student st ON gr StudentId   st StudentId WHERE    sessionid       OR gr SessionId     sessionid   AND    moduleid       OR m ModuleId     moduleid   AND    teacherid       OR s TeacherId     teacherid   AND    studentid       OR gr StudentId     studentid   AND    grade       OR gr Grade     grade   ORDER BY  ordertable ASC      num mysql numrows  result    if isset   POST  submit       echo   lt p gt Your Search   lt strong gt Session ID  lt  strong gt     if  empty  sessionid  echo   All Sessions    else echo    sessionid   echo     lt strong gt Module ID  lt  strong gt     if  empty  moduleid  echo   All Modules    else echo    moduleid   echo     lt strong gt Teacher Username  lt  strong gt     if  empty  teacherid  echo   All Teachers    else echo    teacherid   echo     lt strong gt Student Username  lt  strong gt     if  empty  studentid  echo   All Students    else echo    studentid   echo     lt strong gt Grade  lt  strong gt     if  empty  grade  echo   All Grades    else echo    grade      lt  p gt     echo   lt p gt Number of Records Shown in Result of the Search   lt strong gt  num lt  strong gt  lt  p gt     echo   lt table border  1  gt   lt tr gt   lt th gt Student Id lt  th gt   lt th gt Forename lt  th gt   lt th gt Session Id lt  th gt   lt th gt Grade lt  th gt   lt th gt Mark lt  th gt   lt th gt Module lt  th gt   lt th gt Teacher lt  th gt   lt  tr gt     while   row   mysql fetch array  result      echo   lt tr gt      echo   lt td gt      row  StudentId       lt  td gt      echo   lt td gt      row  Forename       lt  td gt      echo   lt td gt      row  SessionId       lt  td gt      echo   lt td gt      row  Grade       lt  td gt      echo   lt td gt      row  Mark       lt  td gt      echo   lt td gt      row  ModuleName       lt  td gt      echo   lt td gt      row  TeacherId       lt  td gt      echo   lt  tr gt       echo   lt  table gt        mysql close         gt    lt  body gt   lt  html gt    Any help will be much appreciated  Thank You

User · Answer

What you re checking   if isset   POST  submit       but there s no variable name called  submit   well i want you to understand why it doesn t works  lets imagine if you give your submit button name delete  lt input type  submit  value  Submit  name  delete    gt  and check if isset   POST  delete     then it works in this code you didn t give any name to submit button and checking its exist or not with isset    function so php didn t find any variable like  submit  so its not working now try this     lt input type  submit  name  submit  value  Submit    gt

User · Answer

Another option is to use    SERVER  REQUEST METHOD       POST

User · Answer

You need to give your submit  lt input gt  a name or it won t be available using   POST  submit      lt p gt  lt input type  submit  value  Submit  name  submit    gt  lt  p gt

User · Answer

You never named your submit button  so as far as the form is concerned it s just an action   Either    Name the submit button   lt input type  submit  name  submit        gt   Test if   empty   POST   instead to detect when data has been posted    Remember that keys in the   POST superglobal only appear for named input elements  So  unless the element has the name attribute  it won t come through to   POST  or   GET   REQUEST

User · Answer

You must give a name to your submit button   lt input type  submit  value Submit  name  login  gt    Then you can call the button with   POST  login

User · Answer

The   post function need the name value  like    lt input type  submit  value Submit  name  example  gt    Call   var   strip tags   POST  example     if  isset  var           your code here

User · Answer

Whats wrong in this    lt form class  navbar-form navbar-right  method  post  action  login php  gt     lt div class  form-group  gt       lt input type  email  name  email  class  form-control  placeholder  email  gt       lt input type  password  name  password  class  form-control  placeholder  password  gt     lt  div gt     lt input type  submit  name  submit  value  submit  class  btn btn-success  gt   lt  form gt    login php  if isset   POST  submit     amp  amp   empty   POST  submit            if   logged in       echo  asodj

[php] Using if(isset($_POST['submit'])) to not display echo when script is open is not working

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