How to pass data from Javascript to PHP and vice versa

Question

How do I pass have a Javascript script request a PHP page and pass data to it  How do I then have the PHP script pass data back to the Javascript script   client js   data    tohex  4919  sum   1  3  5       how would this script pass data to server php and access the response    server php    tohex            How would this be set to data tohex   sum           How would this be set to data sum     How would this be sent to client js  array base convert  tohex  16   array sum  sum

User · Answer

There s a few ways  the most prominent being getting form data  or getting the query string   Here s one method using JavaScript   When you click on a link it will call the  vals  mytarget    theval   which will submit the form data   When your page posts back you can check if this form data has been set and then retrieve it from the form values    lt script language  javascript  type  text javascript  gt   function  vals target  value      form1 all  target   value target     form1 all  value   value value     form1 submit        lt  script gt    Alternatively you can get it via the query string   PHP has your  GET and  SET global functions to achieve this making it much easier   I m sure there s probably more methods which are better  but these are just a few that spring to mind   EDIT  Building on this from what others have said using the above method you would have an anchor tag like   lt a onclick   vals  name    val    href     gt My Link lt  a gt    And then in your PHP you can get form data using   val     POST  value      So when you click on the link which uses JavaScript it will post form data and when the page posts back from this click you can then retrieve it from the PHP

User · Answer

Passing data from PHP is easy  you can generate JavaScript with it  The other way is a bit harder - you have to invoke the PHP script by a Javascript request   An example  using traditional event registration model for simplicity     lt  -- headers etc  omitted -- gt   lt script gt  function callPHP params        var httpc   new XMLHttpRequest       simplified for clarity     var url    get data php       httpc open  POST   url  true      sending as POST      httpc onreadystatechange   function       Call a function when the state changes          if httpc readyState    4  amp  amp  httpc status    200       complete and no errors             alert httpc responseText      some processing here  or whatever you want to do with the response                      httpc send params      lt  script gt   lt a href     onclick  callPHP  lorem ipsum amp foo bar    gt call PHP script lt  a gt   lt  -- rest of document omitted -- gt    Whatever get data php produces  that will appear in httpc responseText  Error handling  event registration and cross-browser XMLHttpRequest compatibility are left as simple exercises to the reader     See also Mozilla s documentation for further examples

User · Answer

Using cookies is a easy way  You can use jquery and a pluging as jquery cookie or create your own  Using Jquery   jquery cookie  by example      lt script gt     var php value     lt  php echo  php variable    gt        var infobar active     cookie  php value       var infobar alert    any process infobar active          set a cookie to readit via php      cookie  infobar alerta   infobar alerta         lt  script gt       lt  php       var js value   code to read a cookie       gt    I ve found this usefull Server-Side and Hybrid Frameworks  http   www phplivex com  http   www ashleyit com rs   I ve been using Ashley s RSJS Script to update values in HTML without any problem for a long time until I met JQuery  ajax  load  etc

User · Answer

You can pass data from PHP to javascript but the only way to get data from javascript to PHP is via AJAX   The reason for that is you can build a valid javascript through PHP but to get data to PHP you will need to get PHP running again  and since PHP only runs to process the output  you will need a page reload or an asynchronous query

User · Answer

I run into a similar issue the other day  Say  I want to pass data from client side to server and write the data into a log file  Here is my solution   My simple client side code     lt  DOCTYPE HTML PUBLIC  -  W3C  DTD HTML 4 01  EN     http   www w3 org TR html4 strict dtd  gt   lt html gt   lt head gt      lt meta http-equiv  Content-Type  content  text html  charset iso-8859-1    gt      lt script src  http   ajax googleapis com ajax libs jquery 1 9 1 jquery min js  type  text javascript  gt  lt  script gt      lt title gt Test Page lt  title gt      lt script gt      function passVal            var data                 fn   filename               str   this is a dummy test string                        post  test php   data             passVal        lt  script gt    lt  head gt   lt body gt   lt  body gt   lt  html gt    And php code on server side     lt  php      fn      POST  fn        str     POST  str        file   fopen   opt lampp htdocs passVal    fn   record   w       echo fwrite  file  str      fclose  file     gt    Hope this works for you and future readers

User · Answer

There s a few ways  the most prominent being getting form data  or getting the query string   Here s one method using JavaScript   When you click on a link it will call the  vals  mytarget    theval   which will submit the form data   When your page posts back you can check if this form data has been set and then retrieve it from the form values    lt script language  javascript  type  text javascript  gt   function  vals target  value      form1 all  target   value target     form1 all  value   value value     form1 submit        lt  script gt    Alternatively you can get it via the query string   PHP has your  GET and  SET global functions to achieve this making it much easier   I m sure there s probably more methods which are better  but these are just a few that spring to mind   EDIT  Building on this from what others have said using the above method you would have an anchor tag like   lt a onclick   vals  name    val    href     gt My Link lt  a gt    And then in your PHP you can get form data using   val     POST  value      So when you click on the link which uses JavaScript it will post form data and when the page posts back from this click you can then retrieve it from the PHP

User · Answer

Passing data from PHP is easy  you can generate JavaScript with it  The other way is a bit harder - you have to invoke the PHP script by a Javascript request   An example  using traditional event registration model for simplicity     lt  -- headers etc  omitted -- gt   lt script gt  function callPHP params        var httpc   new XMLHttpRequest       simplified for clarity     var url    get data php       httpc open  POST   url  true      sending as POST      httpc onreadystatechange   function       Call a function when the state changes          if httpc readyState    4  amp  amp  httpc status    200       complete and no errors             alert httpc responseText      some processing here  or whatever you want to do with the response                      httpc send params      lt  script gt   lt a href     onclick  callPHP  lorem ipsum amp foo bar    gt call PHP script lt  a gt   lt  -- rest of document omitted -- gt    Whatever get data php produces  that will appear in httpc responseText  Error handling  event registration and cross-browser XMLHttpRequest compatibility are left as simple exercises to the reader     See also Mozilla s documentation for further examples

User · Answer

Passing data from PHP is easy  you can generate JavaScript with it  The other way is a bit harder - you have to invoke the PHP script by a Javascript request   An example  using traditional event registration model for simplicity     lt  -- headers etc  omitted -- gt   lt script gt  function callPHP params        var httpc   new XMLHttpRequest       simplified for clarity     var url    get data php       httpc open  POST   url  true      sending as POST      httpc onreadystatechange   function       Call a function when the state changes          if httpc readyState    4  amp  amp  httpc status    200       complete and no errors             alert httpc responseText      some processing here  or whatever you want to do with the response                      httpc send params      lt  script gt   lt a href     onclick  callPHP  lorem ipsum amp foo bar    gt call PHP script lt  a gt   lt  -- rest of document omitted -- gt    Whatever get data php produces  that will appear in httpc responseText  Error handling  event registration and cross-browser XMLHttpRequest compatibility are left as simple exercises to the reader     See also Mozilla s documentation for further examples

User · Answer

the other way to exchange data from php to javascript or vice versa is by using cookies  you can save cookies in php and read by your javascript  for this you don t have to use forms or ajax

User · Answer

Using cookies is a easy way  You can use jquery and a pluging as jquery cookie or create your own  Using Jquery   jquery cookie  by example      lt script gt     var php value     lt  php echo  php variable    gt        var infobar active     cookie  php value       var infobar alert    any process infobar active          set a cookie to readit via php      cookie  infobar alerta   infobar alerta         lt  script gt       lt  php       var js value   code to read a cookie       gt    I ve found this usefull Server-Side and Hybrid Frameworks  http   www phplivex com  http   www ashleyit com rs   I ve been using Ashley s RSJS Script to update values in HTML without any problem for a long time until I met JQuery  ajax  load  etc

User · Answer

You can pass data from PHP to javascript but the only way to get data from javascript to PHP is via AJAX   The reason for that is you can build a valid javascript through PHP but to get data to PHP you will need to get PHP running again  and since PHP only runs to process the output  you will need a page reload or an asynchronous query

User · Answer

You can pass data from PHP to javascript but the only way to get data from javascript to PHP is via AJAX   The reason for that is you can build a valid javascript through PHP but to get data to PHP you will need to get PHP running again  and since PHP only runs to process the output  you will need a page reload or an asynchronous query

User · Answer

I d use JSON as the format and Ajax  really XMLHttpRequest  as the client- server mechanism

User · Answer

Passing data from PHP is easy  you can generate JavaScript with it  The other way is a bit harder - you have to invoke the PHP script by a Javascript request   An example  using traditional event registration model for simplicity     lt  -- headers etc  omitted -- gt   lt script gt  function callPHP params        var httpc   new XMLHttpRequest       simplified for clarity     var url    get data php       httpc open  POST   url  true      sending as POST      httpc onreadystatechange   function       Call a function when the state changes          if httpc readyState    4  amp  amp  httpc status    200       complete and no errors             alert httpc responseText      some processing here  or whatever you want to do with the response                      httpc send params      lt  script gt   lt a href     onclick  callPHP  lorem ipsum amp foo bar    gt call PHP script lt  a gt   lt  -- rest of document omitted -- gt    Whatever get data php produces  that will appear in httpc responseText  Error handling  event registration and cross-browser XMLHttpRequest compatibility are left as simple exercises to the reader     See also Mozilla s documentation for further examples

User · Answer

I d use JSON as the format and Ajax  really XMLHttpRequest  as the client- server mechanism

User · Answer

I d use JSON as the format and Ajax  really XMLHttpRequest  as the client- server mechanism

User · Answer

I d use JSON as the format and Ajax  really XMLHttpRequest  as the client- server mechanism

User · Answer

I run into a similar issue the other day  Say  I want to pass data from client side to server and write the data into a log file  Here is my solution   My simple client side code     lt  DOCTYPE HTML PUBLIC  -  W3C  DTD HTML 4 01  EN     http   www w3 org TR html4 strict dtd  gt   lt html gt   lt head gt      lt meta http-equiv  Content-Type  content  text html  charset iso-8859-1    gt      lt script src  http   ajax googleapis com ajax libs jquery 1 9 1 jquery min js  type  text javascript  gt  lt  script gt      lt title gt Test Page lt  title gt      lt script gt      function passVal            var data                 fn   filename               str   this is a dummy test string                        post  test php   data             passVal        lt  script gt    lt  head gt   lt body gt   lt  body gt   lt  html gt    And php code on server side     lt  php      fn      POST  fn        str     POST  str        file   fopen   opt lampp htdocs passVal    fn   record   w       echo fwrite  file  str      fclose  file     gt    Hope this works for you and future readers

User · Answer

the other way to exchange data from php to javascript or vice versa is by using cookies  you can save cookies in php and read by your javascript  for this you don t have to use forms or ajax

User · Answer

There s a few ways  the most prominent being getting form data  or getting the query string   Here s one method using JavaScript   When you click on a link it will call the  vals  mytarget    theval   which will submit the form data   When your page posts back you can check if this form data has been set and then retrieve it from the form values    lt script language  javascript  type  text javascript  gt   function  vals target  value      form1 all  target   value target     form1 all  value   value value     form1 submit        lt  script gt    Alternatively you can get it via the query string   PHP has your  GET and  SET global functions to achieve this making it much easier   I m sure there s probably more methods which are better  but these are just a few that spring to mind   EDIT  Building on this from what others have said using the above method you would have an anchor tag like   lt a onclick   vals  name    val    href     gt My Link lt  a gt    And then in your PHP you can get form data using   val     POST  value      So when you click on the link which uses JavaScript it will post form data and when the page posts back from this click you can then retrieve it from the PHP

User · Answer

There s a few ways  the most prominent being getting form data  or getting the query string   Here s one method using JavaScript   When you click on a link it will call the  vals  mytarget    theval   which will submit the form data   When your page posts back you can check if this form data has been set and then retrieve it from the form values    lt script language  javascript  type  text javascript  gt   function  vals target  value      form1 all  target   value target     form1 all  value   value value     form1 submit        lt  script gt    Alternatively you can get it via the query string   PHP has your  GET and  SET global functions to achieve this making it much easier   I m sure there s probably more methods which are better  but these are just a few that spring to mind   EDIT  Building on this from what others have said using the above method you would have an anchor tag like   lt a onclick   vals  name    val    href     gt My Link lt  a gt    And then in your PHP you can get form data using   val     POST  value      So when you click on the link which uses JavaScript it will post form data and when the page posts back from this click you can then retrieve it from the PHP

User · Answer

You can pass data from PHP to javascript but the only way to get data from javascript to PHP is via AJAX   The reason for that is you can build a valid javascript through PHP but to get data to PHP you will need to get PHP running again  and since PHP only runs to process the output  you will need a page reload or an asynchronous query

[php] How to pass data from Javascript to PHP and vice versa?

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