How can I call PHP functions by JavaScript

Question

I am trying to call a PHP function from an external PHP file into a JavaScript script  My code is different and large  so I am writing a sample code here    This is my PHP code    lt  php function add  a  b      c  a  b    return  c    function mult  a  b      c  a  b    return  c     function divide  a  b      c  a  b    return  c      gt    This is my JavaScript code    lt script gt    var phpadd  add 1 2     call the php add function   var phpmult  mult 1 2     call the php mult function   var phpdivide  divide 1 2     call the php divide function  lt  script gt    So this is what I want to do   My original PHP file doesn t include these mathematical functions but the idea is same   If some how it doesn t have a proper solution  then may you please suggest an alternative  but it should call values from external PHP

User · Answer

I created this library  may be of help to you  MyPHP client and server side library  Example    lt  DOCTYPE html gt   lt html gt   lt head gt       lt meta charset  utf-8  gt       lt meta http-equiv  X-UA-Compatible  content  IE edge  gt       lt title gt Page Title lt  title gt       lt meta name  viewport  content  width device-width  initial-scale 1  gt   lt  head gt   lt body gt        lt  -- include MyPHP js -- gt       lt script src  MyPHP js  gt  lt  script gt        lt  -- use MyPHP class -- gt       lt script gt          const php   new MyPHP          php auth    hashed-key               call a php class         const phpClass   php fromClass  Authentication  or  Moorexa  Authentication    lt pass aguments for constructor here gt                call a method in that class         phpClass method  login    lt arguments gt                you can keep chaining here                finally let s call this class         php call phpClass  then  response   gt                  returns a promise                          calling a function is quite simple also         php call  say hello    lt arguments gt   then  response   gt                  returns a promise                         if your response has a script tag and you need to update your dom call just call         php html response         lt  script gt   lt  body gt   lt  html gt

User · Answer

I wrote some script for me its working    I hope it may useful to you    lt  php if    POST  add      function add         a  You clicked on add fun      echo  a    add      else if     POST  sub       function sub         a  You clicked on sub funn   echo  a      sub          gt   lt form action   lt  php echo   SERVER  PHP SELF     gt   method  POST  gt    lt input type  submit  name  add  Value  Call Add fun  gt   lt input type  submit  name  sub  Value  Call Sub funn  gt   lt  php echo   a    gt    lt  form gt

User · Answer

This work perfectly for me   To call a PHP function  with parameters too  you can  like a lot of people said  send a parameter opening the PHP file and from there check the value of the parameter to call the function  But you can also do that lot of people say it s impossible  directly call the proper PHP function  without adding code to the PHP file   I found a way   This for JavaScript   function callPHP expression  objs  afterHandler            expression   expression trim            var si   expression indexOf               if  si    -1              expression                  else if  Object keys objs  length  gt  0                var sfrom   expression substring si   1               var se   sfrom indexOf                   var result   sfrom substring 0  se  trim                if  result length  gt  0                    var params   result split                       var theend   expression substring expression length - sfrom length   se                   expression   expression substring 0  si   1                   for  var i   0  i  lt  params length  i                          var param   params i  trim                        if  param in objs                            var value   objs param                           if  typeof value     string                               value         value                                if  typeof value     undefined                               expression    value                                                                expression   expression substring 0  expression length - 1    theend                                  var doc   document location          var phpFile    URL of your PHP file           var php                 docl   str replace                   doc         absUrl   str replace  docl    SERVER  DOCUMENT ROOT    str replace                   phpFile                          fileName   basename  absUrl   folder   substr  absUrl  0  strlen  absUrl  - strlen  fileName                    set include path  folder  include  fileName     expression                var url   doc     phpCompiler php      code     encodeURIComponent php             ajax               type   GET               url  url              complete  function resp                   var response   resp responseText                  afterHandler response                                      This for a PHP file which isn t your PHP file  but another  which path is written in url variable of JS function callPHP   and it s required to evaluate PHP code  This file is called  phpCompiler php  and it s in the root directory of your website    lt  php  code   urldecode   REQUEST  code      lines   explode       code   foreach  lines as  line      eval trim  line                 gt     So  your PHP code remain equals except return values  which will be echoed    lt  php function add  a  b      c  a  b    echo  c    function mult  a  b      c  a  b    echo  c     function divide  a  b      c  a  b    echo  c      gt     I suggest you to remember that jQuery is required   Download it from Google CDN    lt script src  https   ajax googleapis com ajax libs jquery 3 1 1 jquery min js  gt  lt  script gt    or from Microsoft CDN   I prefer Google        lt script src  https   ajax aspnetcdn com ajax jQuery jquery-3 1 1 min js  gt  lt  script gt    Better is to download the file from one of two CDNs and put it as local file  so the startup loading of your website s faster The choice is to you   Now you finished  I just tell you how to use callPHP function  This is the JavaScript to call PHP     Names of parameters are custom  they haven t to be equals of these of the PHP file    These fake names are required to assign value to the parameters in PHP   using an hash table  callPHP  add num1  num2                   num1    1               num2    2                        function output                    alert output     This to display the output of the PHP file

User · Answer

Try This   lt script gt    var phpadd   lt  php echo add 1 2    gt    call the php add function   var phpmult   lt  php echo mult 1 2    gt    call the php mult function   var phpdivide   lt  php echo divide 1 2    gt    call the php divide function  lt  script gt

User · Answer

index php   lt body gt       lt input id  Div7  name  Txt Nombre  maxlenght  100px  placeholder  Nombre    gt   lt input id  Div8  name  Txt Correo  maxlenght  100px  placeholder  Correo    gt   lt textarea id  Div9  name  Txt Pregunta  placeholder  Pregunta    gt  lt  textarea gt    lt script type  text javascript  language  javascript  gt     document  ready function             Txt Enviar   click function     EnviarCorreo             function EnviarCorreo         jQuery ajax           type   POST           url   servicios php           data   functionname   enviaCorreo   arguments       Txt Nombre   val        Txt Correo   val        Txt Pregunta   val                success function data            alert data                          lt  script gt    servicios php   lt  php        include   correo php          nombre     POST  Txt Nombre         correo     POST  Txt Corro         pregunta     POST  Txt Pregunta         switch   POST  functionname               case  enviaCorreo                EnviaCorreoDesdeWeb  nombre   correo   pregunta               break                   gt    correo php   lt  php     function EnviaCorreoDesdeWeb  nombre   correo   pregunta                            gt

User · Answer

You need to create an API   Your js functions execute AJAX requests on your web service    var mult   function arg1  arg2        ajax         url   webservice php action mult amp arg1   arg1   amp arg2   arg2        done function data          console log data                 on the php side  you ll have to check the action parameter in order to execute the propre function  basically a switch statement on the   GET  action   variable

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Void Function  lt  php function printMessage         echo  quot Hello World  quot       gt    lt script gt      document write  quot  lt  php printMessage     gt  quot     lt  script gt    Value Returning Function  lt  php function getMessage         return  quot Hello World  quot       gt    lt script gt      var text    quot  lt  php echo getMessage     gt  quot    lt  script gt

User · Answer

Yes  you can do ajax request to server with your data in request parameters  like this  very simple    Note that the following code uses jQuery  jQuery ajax       type   POST       url   your functions address php       dataType   json       data   functionname   add   arguments   1  2         success  function  obj  textstatus                      if     error  in obj                            yourVariable   obj result                                        else                         console log obj error                                           and your functions address php like this        lt  php     header  Content-Type  application json          aResult   array         if   isset   POST  functionname         aResult  error      No function name           if   isset   POST  arguments         aResult  error      No function arguments           if   isset  aResult  error                 switch   POST  functionname                  case  add                  if   is array   POST  arguments        count   POST  arguments     lt  2                          aResult  error      Error in arguments                                    else                       aResult  result     add floatval   POST  arguments   0    floatval   POST  arguments   1                                     break               default                  aResult  error      Not found function     POST  functionname                       break                        echo json encode  aResult      gt

User · Answer

I created this library JS PHP Import which you can download from github  and use whenever and wherever you want   The library allows importing php functions and class methods into javascript browser environment thus they can be accessed as javascript functions and methods by using their actual names  The code uses javascript promises so you can chain functions returns   I hope it may useful to you   Example    lt script gt   scandir PATH TO FOLDER  then function result      resultObj html result join   lt br gt            system  ls -l   then function result      resultObj append result         str replace      then function result      resultObj append result           Chaining functions   testfn 34  56  exec function result       first call    return  testfn 34  result      second call with the result of the first call as a parameter    exec function result       resultObj append  result      result     lt br gt  lt br gt          lt  script gt

User · Answer

Try looking at CASSIS  The idea is to mix PHP with JS so both can work on client and server side

User · Answer

use document write for example    lt script gt    document write    lt  php add 1 2     gt        document write    lt  php milt 1 2     gt        document write    lt  php divide 1 2     gt       lt  script gt

User · Answer

If you actually want to send data to a php script for example you can do this   The php    lt  php  a     REQUEST  a     b     REQUEST  b      totally sanitized  echo  a    b    gt    Js  using jquery      post   path to above php    a  something  b  something   function data                                                   somediv   html data

[javascript] How can I call PHP functions by JavaScript?

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