Calling a particular PHP function on form submit

Question

I was trying to call a particular php function in submit of a form both the form and php scripts are in same page  My code is below  it is not working and so I need help    lt html gt       lt body gt       lt form method  post  action  display    gt           lt input type  text  name  studentname  gt           lt input type  submit  value  click  gt       lt  form gt       lt  php         function display                         echo  hello    POST  studentname                    gt       lt  body gt   lt  html gt

User · Answer

Assuming that your script is named x php  try this   lt  php     function display  s          echo  s         gt   lt html gt       lt body gt           lt form method  post  action  x php  gt               lt input type  text  name  studentname  gt               lt input type  submit  value  click  gt           lt  form gt           lt  php            if   SERVER  REQUEST METHOD     POST                               display                            gt       lt  body gt   lt  html gt

User · Answer

Write this code    lt  php     if isset   POST  submit              echo  Hello World            gt    lt html gt        lt body gt            lt form method  post  gt                lt input type  text  name  studentname  gt                lt input type  submit  name  submit  value  click  gt            lt  form gt        lt  body gt   lt  html gt

User · Answer

PHP is run on a server  Your browser is a client  Once the server sends all the info to the client  nothing can be done on the server until another request is made   To make another request without refreshing the page you are going to have to look into ajax  Look into jQuery as it makes ajax requests easy

User · Answer

In the following line   lt form method  post  action  display    gt    the action should be the name of your script and you should call the function  Something like this   lt form method  post  action  yourFileName php  gt       lt input type  text  name  studentname  gt       lt input type  submit  value  click  name  submit  gt   lt  -- assign a name for the button -- gt   lt  form gt    lt  php function display         echo  hello     POST  studentname      if isset   POST  submit          display         gt

User · Answer

An alternative  and perhaps a not so good procedural coding one  is to send the  quot function name quot  to a script that then executes the function    For instance  with a login form  there is typically the login  forgotusername  forgotpassword  signin activities that  are presented on the form as buttons or anchors    All of these can be directed to as  say  weblogin php function login weblogin php function forgotusername weblogin php function forgotpassword weblogin php function signin  And then a switch statement on the receiving page  does any prep work  and then dispatches or runs the  next  specified function

User · Answer

If you want to call a function on clicking of submit button then you have to use ajax or jquery if you want to call your php function after submission of form you can do that as     lt html gt   lt body gt   lt form method  post  action  display    gt   lt input type  text  name  studentname  gt   lt input type  submit  value  click  gt   lt  form gt   lt  php function display     echo  hello    POST  studentname      if   SERVER  REQUEST METHOD     POST            display         gt   lt  body gt   lt  html gt

User · Answer

you don t need this code   lt  php function display     echo  hello    POST  studentname        gt    Instead  you can check whether the form is submitted by checking the post variables using isset   here goes the code  if isset   POST    echo  hello     POST  studentname        click here for the php manual for isset

[php] Calling a particular PHP function on form submit

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