How to pass form input value to php function

Question

I want to write a php page in which there is a html form  I want to send all input  number for example  of my form to a php function  instead of a javascript function  I make this to hide my javascript function code      How can I send input value to php function  Is it possible to call the php function through onclick  function param1  param2    I know that javascript is a client-side language while php is server-side   If it is possible  how can I write the return of the function in an input field  I want to remain in my page  Is it correct - action      My code is    lt form action     method  get  gt      Inserisci number1        lt input type  text  name  val1  id  val1  gt  lt  input gt        lt  php echo  ciaoooo     gt        lt br gt  lt  br gt      Inserisci number2       lt input type  text  name  val2  id  val2  gt  lt  input gt        lt br gt  lt  br gt        lt input type  submit  value  send  gt  lt  input gt   lt  form gt    Help me in the implementation of the simple php function and in the passage of values from input to function  Thanks

User · Accepted Answer

Make your action empty  You don t need to set the  onclick attribute  that s only javascript  When you click your submit button  it will reload your page with input from the form  So write your PHP code at the top of the form     lt  php if  isset   GET  submit              be sure to validate and clean your variables      val1   htmlentities   GET  val1          val2   htmlentities   GET  val2            then you can use them in a PHP function        result   myFunction  val1   val2       gt    lt  php if  isset  result    echo  result    print the result above the form   gt    lt form action    method  get  gt      Inserisci number1        lt input type  text  name  val1  id  val1  gt  lt  input gt        lt  php echo  ciaoooo     gt        lt br gt  lt  br gt      Inserisci number2       lt input type  text  name  val2  id  val2  gt  lt  input gt        lt br gt  lt  br gt        lt input type  submit  name  submit  value  send  gt  lt  input gt   lt  form gt

User · Answer

you must have read about function call   here i give you example of it    lt  php  funtion pr  n    echo  n       gt   lt form action   lt  php  f   POST  input   pr  f    gt   method  POST  gt   lt input name input type text gt  lt  input gt   lt  form gt

User · Answer

You need to look into Ajax  Start here this is the best way to stay on the current page and be able to send inputs to php    lt  DOCTYPE html gt   lt html gt   lt head gt   lt script gt  function showHint str    var xmlhttp  if  str length  0         document getElementById  txtHint   innerHTML       return      if  window XMLHttpRequest        code for IE7   Firefox  Chrome  Opera  Safari   xmlhttp new XMLHttpRequest        else       code for IE6  IE5   xmlhttp new ActiveXObject  Microsoft XMLHTTP        xmlhttp onreadystatechange function         if  xmlhttp readyState  4  amp  amp  xmlhttp status  200            document getElementById  txtHint   innerHTML xmlhttp responseText            xmlhttp open  GET   gethint php q   str true   xmlhttp send       lt  script gt   lt  head gt   lt body gt    lt h3 gt Start typing a name in the input field below  lt  h3 gt   lt form action    gt   First name   lt input type  text  id  txt1  onkeyup  showHint this value     gt   lt  form gt   lt p gt Suggestions   lt span id  txtHint  gt  lt  span gt  lt  p gt     lt  body gt   lt  html gt    This gets the users input on the textbox and opens the webpage gethint php q ja from here the php script can do anything with   GET  q   and echo back to the page James  Jason    etc

User · Answer

No  the action should be the name of php file  With on click you may only call JavaScript  And please be aware the hiding your code from the user undermines trust  JS runs on the browser so some trust is needed

User · Answer

This is pretty basic  just put in the php file you want to use for processing in the  element    For example    lt form action  process php  method  post  gt    Then in process php you would get the form values using   POST  name of the variable

User · Answer

You can write your php file to the action attr of form element  At the php side you can get the form value by   POST  element name

[php] How to pass form input value to php function

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