using jquery ajax to call a PHP function

Question

This may be a simple answer  but I m using jQuery s   ajax to call a PHP script  What I want to do is basically put that PHP script inside a function and call the PHP function from javascript     lt  php  if isset   POST  something           do something     gt    to this   lt  php function test         if isset   POST  something                do something             gt    How would i call that function in javascript  Right now i m just using   ajax with the PHP file listed

User · Answer

You can t call a PHP function with Javascript  in the same way you can t call arbitrary PHP functions when you load a page  just think of the security implications    If you need to wrap your code in a function for whatever reason  why don t you either put a function call under the function definition  eg   function test            function code    test      Or  use a PHP include   include  functions php      functions php has the test function test

User · Answer

I developed a jQuery plugin that allows you to call any core PHP function or even user defined PHP functions as methods of the plugin  jquery php  After including jquery and jquery php in the head of our document and placing request handler php on our server we would start using the plugin in the manner described below   For ease of use reference the function in a simple manner       var P     fn php    Then initialize the plugin   P  init             The path to our function request handler is absolutely required      path    http   www YourDomain com jqueryphp request handler php           Synchronous requests are required for method chaining functionality      async   false          List any user defined functions in the manner prescribed here                There must be user defined functions with these same names in your PHP      userFunctions              languageFunctions   someFunc1 someFunc2                           And now some usage scenarios      Suspend callback mode so we don t work with the DOM P callback false       Both  end   and  data return data to variables var strLenA   P strlen  some string   end    var strLenB   P strlen  another string   end    var totalStrLen   strLenA   strLenB  console log  totalStrLen       25      data Returns data in an array var data1   P crypt  Some Crypt String   data    console log  data1          1 Tk1b01rk shTKSqDslatUSRV3WdlnI      Demonstrating PHP function chaining   var data1   P strtoupper  u p p e r c a s e   strstr      C A S E   explode          2  data    var data2   P strtoupper  u p p e r c a s e   strstr      C A S E   explode          2  end    console log  data1  data2      Demonstrating sending a JSON block of PHP pseudo-code   var data1            P block        str   Let s use PHP s file get contents           opts                               http                    method   GET                   header   Accept-language  en r n                             Cookie  foo bar r n                                      context                 stream context create     opts               contents                 file get contents    http   www github com    false    context               html                 htmlentities     contents            data        console log  data1      The backend configuration provides a whitelist so you can restrict which functions can be called  There are a few other patterns for working with PHP described by the plugin as well

User · Answer

You may use my library that does that automatically  I ve been improving it for the past 2 years http   phery-php-ajax net  Phery  instance  - gt set array      phpfunction    gt  function  data            Do your thing          return PheryResponse  factory       do your dom manipulation  return JSON  etc        - gt process      The javascript would be simple as  phery remote  phpfunction      You can pass all the dynamic javascript part to the server  with a query builder like chainable interface  and you may pass any type of data back to the PHP  For example  some functions that would take too much space in the javascript side  could be called in the server using this  in this example  mcrypt  that in javascript would be almost impossible to accomplish    function mcrypt variable  content  key     phery remote  mcrypt encrypt     var   variable   content   content   key  key    false         would use it like  you may keep the key on the server  safer  unless it s encrypted for the user  window variable       mcrypt  variable    This must be encoded and put inside variable    my key      and in the server  Phery  instance  - gt set array     mcrypt encrypt    gt  function  data         r   new PheryResponse         iv size   mcrypt get iv size MCRYPT RIJNDAEL 256  MCRYPT MODE ECB         iv   mcrypt create iv  iv size  MCRYPT RAND         encrypted   mcrypt encrypt MCRYPT RIJNDAEL 256   data  key        my key    data  content    MCRYPT MODE ECB   iv        return  r- gt set var  data  variable     encrypted           or call a callback with the data   r- gt call  data  callback     encrypted         - gt process      Now the variable will have the encrypted data

User · Answer

You are going to have to expose and endpoint  URL  in your system which will accept the POST request from the ajax call in jQuery   Then  when processing that url from PHP  you would call your function and return the result in the appropriate format  JSON most likely  or XML if you prefer

User · Answer

I would stick with normal approach to call the file directly  but if you really want to call a function  have a look at JSON-RPC  JSON Remote Procedure Call    You basically send a JSON string in a specific format to the server  e g      method    echo    params     Hello JSON-RPC     id   1    which includes the function to call and the parameters of that function   Of course the server has to know how to handle such requests  Here is jQuery plugin for JSON-RPC and e g  the Zend JSON Server as server implementation in PHP     This might be overkill for a small project or less functions  Easiest way would be karim s answer  On the other hand  JSON-RPC is a standard

User · Answer

Use   ajax to call a server context  or URL  or whatever  to invoke a particular  action    What you want is something like     ajax   url    my site            data   action   test             type   post            success  function output                          alert output                             On the server side  the action POST parameter should be read and the corresponding value should point to the method to invoke  e g    if isset   POST  action     amp  amp   empty   POST  action            action     POST  action        switch  action            case  test    test   break          case  blah    blah   break                etc              I believe that s a simple incarnation of the Command pattern

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