How do I embed PHP code in JavaScript

Question

How can we use PHP code in JavaScript   Like  function jst         var i   0      i    lt  php echo 35    gt      alert i       Please suggest a better way

User · Answer

PHP has to be parsed on the server  JavaScript is working in the client s browser   Having PHP code in a  js file will not work  except you can tell the server to parse the file you want to have as  js before it sends it to the client  And telling the server is the easiest thing in the world  just add  php at the end of the filename   So  you could name it javascript php  Or  so you know what this file is PRIMARILY  you could name it javascript js php - the server will recognize it as  php and parse it

User · Answer

If you put your JavaScript code in the PHP file  you can  but not otherwise  For example   page php  this will work   function jst         var i   0      i    lt  php echo 35    gt       alert i       page js  this won t work   function jst         var i   0      i    lt  php echo 35    gt      alert i

User · Answer

We can t use  PHP in between JavaScript   because PHP runs on the server and JavaScript - on the client   However we can generate JavaScript code as well as HTML  using all PHP features  including the escaping from HTML one

User · Answer

Here is an example   html code     lt td gt                   lt select name   row  count     data-placeholder  Choose One     class  chosen-select form-control  tabindex  2  gt                      lt option selected  selected  disabled  disabled  value    gt Select Exam Name lt  option gt                      lt  php foreach  NM EXAM as  ky  gt  row                    echo   lt option value     row- gt EXAM ID     gt      row- gt EXAM NAME     lt  option gt                       gt                  lt  select gt              lt  td gt      Or  echo   lt option value      row- gt EXAM ID      gt      row- gt EXAM NAME     lt  option gt

User · Answer

A small demo may help you  In abc php file    lt script type  text javascript  gt          lt  php echo      selectCategory row  subID    gt    on  switchChange bootstrapSwitch   function event  state            postState state   lt  php echo  selectCategory row  subID    gt              lt  script gt

User · Answer

If your whole JavaScript code gets processed by PHP  then you can do it just like that   If you have individual  js files  and you don t want PHP to process them  for example  for caching reasons   then you can just pass variables around in JavaScript   For example  in your index php  or wherever you specify your layout   you d do something like this    lt script type  text javascript  gt      var my var    lt  php echo json encode  my var     gt    lt  script gt    You could then use my var in your JavaScript files   This method also lets you pass other than just simple integer values  as json encode   also deals with arrays  strings  etc  correctly  serialising them into a format that JavaScript can use

User · Answer

Yes  you can  provided your JavaScript code is embedded into a PHP file

User · Answer

You re pretty much on the ball  The only difference is I d separate out the JavaScript code so the majority was in an external static file  Then you just define variables or call a function from the actual PHP page    lt script type  text javascript gt      function in other file  lt  php echo my php var    gt     lt  script gt

User · Answer

This is the bit of code you need at the top of your JavaScript file    lt  php     header  Content-Type  text javascript  charset UTF-8      gt    function         alert  hello world

[php] How do I embed PHP code in JavaScript?

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