Calling java script in PHP

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  • Dheeraj Joshi
    Recognized Expert Top Contributor
    • Jul 2009
    • 1129
    #1

    Calling java script in PHP

    I have this code.


    Code:
    <html>
<body>
<?php

$res = `php myfile.php`;

switch($res)
{
	case 1: "<scriptlanguage=javascript> 
		alert('Blah Blah')
		</script>";
		break;
	case 2: echo "Choice 2";
		break;
	case 3: echo "Choice 3";
		break;
	default:echo "No choice";
		break;
}

?>
</body>
</html>
    Technically it should pop up a window of alert.

    But it wont.
    Code:
    echo $res;
    this will give value 1.

    Whats wrong with it.?

    Regards
    Dheeraj Joshi
    Tags: None
    • Dormilich
      Recognized Expert Expert
      • Aug 2008
      • 8694
      #2
      Originally posted by dheerajjoshim
      Technically it should pop up a window of alert.
      No, it should give "No choice". if you do var_dump($res); you’ll see why. besides, even if $res would be a string it still would match the default chioce.

      Originally posted by dheerajjoshim
      this will give value 1.
      how do you come to that conclusion?

        Comment

        • Dheeraj Joshi
          Recognized Expert Top Contributor
          • Jul 2009
          • 1129
          #3
          $res is integer by the way.

          So isnt there a technique to pop up a window in PHP code?

          Regards
          Dheeraj Joshi

            Comment

            • Dormilich
              Recognized Expert Expert
              • Aug 2008
              • 8694
              #4
              Originally posted by dheerajjoshim
              Code:
              $res = `php myfile.php`;
              how is that an integer?

                Comment

                • Dheeraj Joshi
                  Recognized Expert Top Contributor
                  • Jul 2009
                  • 1129
                  #5
                  Its a string...

                  I am sorry..

                  So can i use java script in PHP?

                  Regards
                  Dheeraj Joshi

                    Comment

                    • Dormilich
                      Recognized Expert Expert
                      • Aug 2008
                      • 8694
                      #6
                      Originally posted by dheerajjoshim
                      Its a string...
                      it ain’t even a string, it’s NULL because you assign a set of invalid characters. (strings are wrapped in ' (single quotation mark or apostrophe) or " (double quotation mark) not backticks (these are used in SQL).

                      but of course you can use PHP to print JS code…

                        Comment

                        • Dheeraj Joshi
                          Recognized Expert Top Contributor
                          • Jul 2009
                          • 1129
                          #7
                          Yeah they are backticks

                          Code:
                          $res=`php myfile.php`
                          it executes file named myfile.php and gives the result back.

                          Regards
                          Dheeraj Joshi

                            Comment

                            • Dormilich
                              Recognized Expert Expert
                              • Aug 2008
                              • 8694
                              #8
                              Originally posted by dheerajjoshim
                              Code:
                              $res=`php myfile.php`
                              it executes file named myfile.php and gives the result back.
                              actually… no. if you want to ‘execute’ a file you need to load/include it. and that doesn’t return a value…
                              Code:
                              // 4 different ways to include a file
include "file.php";
include_once "file.php";
require "file.php";
require_once "file.php";
                              and backticks are not valid string delimiters.

                              the only constructs able to return a value are variables, constants, functions, properties and methods (the latter 2 being special cases from to objects)

                                Comment

                                • Dheeraj Joshi
                                  Recognized Expert Top Contributor
                                  • Jul 2009
                                  • 1129
                                  #9
                                  You mean,

                                  Code:
                                  include("myfile.php");

$res=myfile::myfun();
                                  So this basically must hold the return value of function myfun() in myfile.

                                  Regards
                                  Dheeraj Joshi

                                    Comment

                                    • Dormilich
                                      Recognized Expert Expert
                                      • Aug 2008
                                      • 8694
                                      #10
                                      Originally posted by dheerajjoshim
                                      So this basically must hold the return value of function myfun() in myfile.
                                      let’s say that myfun() must return a value.

                                      so the code now looks sensible.

                                        Comment

                                        • Dheeraj Joshi
                                          Recognized Expert Top Contributor
                                          • Jul 2009
                                          • 1129
                                          #11
                                          Ok.. Thanks..

                                          Back to my java script problem?

                                          How i have embedded the java script, is it correct?

                                          Regards
                                          Dheeraj Joshi

                                            Comment

                                            • Dormilich
                                              Recognized Expert Expert
                                              • Aug 2008
                                              • 8694
                                              #12
                                              if you don’t need a condition, just echo it out.

                                                Comment

                                                • Markus
                                                  Recognized Expert Expert
                                                  • Jun 2007
                                                  • 6092
                                                  #13
                                                  Originally posted by dheerajjoshim
                                                  Ok.. Thanks..

                                                  Back to my java script problem?

                                                  How i have embedded the java script, is it correct?

                                                  Regards
                                                  Dheeraj Joshi
                                                  You're missing the echo/print call in the case.

                                                    Comment

                                                    • Jezternz
                                                      New Member
                                                      • Jan 2008
                                                      • 145
                                                      #14
                                                      I have either missed something obvious, or the javascript tag is completly wrong.
                                                      Code:
                                                      "<scriptlanguage=javascript> 
        alert('Blah Blah')
</script>";
                                                      Should be:
                                                      Code:
                                                      echo "<script type=\"text/javascript\">
        alert('Blah Blah')
</script>";

                                                        Comment

                                                        • Dheeraj Joshi
                                                          Recognized Expert Top Contributor
                                                          • Jul 2009
                                                          • 1129
                                                          #15
                                                          yeah Mark..

                                                          I a gave that echo still it do not give anything.

                                                          Regards
                                                          Dheeraj Joshi

                                                            Comment

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