How can you use php in a javascript function

Question

lt html gt       lt  php          num   1          echo  num        gt       lt input type  button             name  lol              value  Click to increment             onclick  Inc      gt       lt br gt       lt script gt          function Inc                      lt  php              num   2              echo  num            gt                 lt  script gt   lt  html gt    This is what i have so far  not working though  i think i need to use ajax or something but i have no idea what to do   Thanks

User · Answer

Simply  your question sounded wrong because the JavaScript variables need to be echoed    x000D   x000D   lt  php x000D           num   1  x000D          echo  num  x000D          echo   lt input type  button  value  Click  onclick  readmore      gt    x000D       echo   lt script gt  function readmore     document write     x000D           num   2  x000D          echo  num  x000D          echo         lt  script gt    x000D    gt  x000D   x000D   x000D

User · Answer

you use script in php     lt  php           num   1          echo  num       echo   lt input type  button             name  lol              value  Click to increment             onclick  Inc      gt       lt br gt       lt script gt          function Inc                            num   2              echo  num           echo         lt  script gt      gt

User · Answer

Simply return it    lt html gt       lt  php          num   1          echo  num        gt       lt input type  button         name  lol          value  Click to increment         onclick  Inc      gt       lt br gt       lt script gt          function Inc                         Return  lt  php              num   2              echo  num                gt                  lt  script gt   lt  html gt

User · Answer

I think you re confusing server code with client code   JavaScript runs on the client after it has received data from the server  like a webpage    PHP runs on the server before it sends the data   So there are two ways with interacting with JavaScript with php   Like above  you can generate javascript with php in the same fashion you generate HTML with php   Or you can use an AJAX request from javascript to interact with the server   The server can respond with data and the javascript can receive that and do something with it   I d recommend going back to the basics and studying how HTTP works in the server-client relationship   Then study the concept of server side languages and client side languages   Then take a tutorial with ajax  and you will start getting the concept   Good luck  google is your friend

User · Answer

In the above given code   assign the php value to javascript variable    lt html gt   lt  php   num   1   echo  num    gt     lt input type    button  name    lol  value    Click to increment  onclick    Inc    gt     lt br gt     lt script gt     var numeric    lt  php echo  num    gt      assigns value of the  num to javascript var             numeric    function Inc             numeric   eVal numeric    1       alert  Increamented value    numeric           lt  script gt   lt  html gt    One thing in combination of PHP and Javsacript is you can not assign javascript value to PHP value  You can assign PHP value to javascript variable

User · Answer

You can t run PHP code with Javascript  When the user recieves the page  the server will have evaluated and run all PHP code  and taken it out  So for example  this will work   alert   lt  php echo    Hello       gt       Because server will have evaluated it to this   alert  Hello      However  you can t perform any operations in PHP with it   This   function Inc      lt  php  num   2  echo  num    gt      Will simply have been evaluated to this   function Inc         2     If you wan t to call a PHP script  you ll have to call a different page which returns a value from a set of parameters   This  for example  will work   script php   num     POST  num    echo  num   2    Javascript jQuery   on another page      post  script php     num  5    function result        alert result          This should alert 10   Good luck   Edit  Just incrementing a number on the page can be done easily in jQuery like this  http   jsfiddle net puVPc

User · Answer

There is a way to run php in client-side javascript  not talking about server-side js here   Don t know if this is a very good idea  but you can  As some people pointed out you have to keep in mind the php is evaluated on the server and then returned as static stuff to the browser who will then run the javascript with the added data from the server   You have to tell the server to evaluate the js files as php files  if you are running an apache server you can do this with a htaccess-file like this    lt FilesMatch    js   gt  SetHandler application x-httpd-php Header set Content-type  application javascript   lt  FilesMatch gt    More info here   Parse js css as a PHP file using htaccess  http   css-tricks com snippets htaccess use-php-inside-javascript   Edit  On http page request this trick makes files with js extension be parsed by the php compiler  All php parts in the js file will get executed and the js file with added server data will be handed to the browser   However  the OP uses an html formated file  probably with php extension   no js file  so in this specific case there s no need for my suggestion   The suggested js solutions are the way to go  If the variable needs to get stored on the server  use ajax to send it there

User · Answer

Try this may work     lt html gt      lt  php  num   1    gt      lt div id  Count  gt  lt  php echo  num    gt  lt  div gt      lt input type    button  name    lol  value    Click to increment  onclick    Inc    gt      lt br gt      lt script gt     function Inc            i   parseInt document getElementById  Count   innerHTML          document getElementById  Count   innerHTML   i 1           lt  script gt   lt  html gt

User · Answer

despite some comments  at some cases it s really necessary to access PHP functions at Javascript  e g  the AJAX cases     At these cases you can use the mwsX library to use your PHP functions at Javascript   mwsX library  https   github com loureirorg mwsx

[php] How can you use php in a javascript function

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