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Re: How to pass a php variable to a javascript file (function)?

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On 2015-10-02 09:44, Evertjan. wrote:
> 
>>              var some_string = <?php echo json_encode($sometext); ?>;
> 
> This is totally errorprone, you need to enclose the litteral string in '-s 
> or "-s, ensuring that the ones used do not appear in the inner text.

No, json_encode() already takes care of quoting and character escaping;
adding extra quotes around the result would be a syntax error.

That doesn't mean that json_encode() by itself is enough to safely
escape strings as JavaScript literals. What if $sometext contains
"</script>"?

What actually has to be escaped - in addition to characters like quotes,
newlines, etc - depends on which HTML version is used.
For HTML5, the process and some pitfalls are described here:
http://www.w3.org/TR/html5/scripting-1.html#restrictions-for-contents-of-script-elements

Short version:

| Note: The easiest and safest way to avoid the rather strange
| restrictions described in this section is to always escape "<!--" as
| "<\!--", "<script" as "<\script", and "</script" as "<\/script"  […]

> That variable some_string, being a clientside javascript varaiable on 
> another PAGE, was lost when leaving that page.
> 
>> So in doSomething I want to be able to use this some_string created in 
>> php file. How can I do it? 
> 
> So you cannot.
> 
> Why don't you create that string on the "index.html" PAGE,
> that you probably will have to rename to "index.php".

Thats one way to do it. Unfortunately, we don't know enough about OP's
project to give any meaningful advice. For example, if we knew that
`some_string` is relatively short, we could suggest passing it along to
index.html in the query string.

  location.href = "index.html?s=" + encodeURIComponent(some_string);

The script included from index.html could then read it back from the
query string.

In general, mixing dynamic and static files (PHP and plain HTML) like
this tends to get messy.


- stefan

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Thread

How to pass a php variable to a javascript file (function)? JiiPee <no@notvalid.com> - 2015-10-02 00:13 +0100
  Re: How to pass a php variable to a javascript file (function)? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-10-02 09:44 +0200
    Re: How to pass a php variable to a javascript file (function)? Stefan Weiss <krewecherl@gmail.com> - 2015-10-02 12:14 +0200
      Re: How to pass a php variable to a javascript file (function)? JiiPee <no@notvalid.com> - 2015-10-02 11:43 +0100
      Re: How to pass a php variable to a javascript file (function)? JiiPee <no@notvalid.com> - 2015-10-02 11:58 +0100
        Re: How to pass a php variable to a javascript file (function)? Stefan Weiss <krewecherl@gmail.com> - 2015-10-02 13:38 +0200
          Re: How to pass a php variable to a javascript file (function)? JiiPee <no@notvalid.com> - 2015-10-02 12:53 +0100
            Re: How to pass a php variable to a javascript file (function)? JiiPee <no@notvalid.com> - 2015-10-02 13:46 +0100
            Re: How to pass a php variable to a javascript file (function)? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-02 13:51 +0100
          Re: How to pass a php variable to a javascript file (function)? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-10-02 21:42 +0200
            Re: How to pass a php variable to a javascript file (function)? Stefan Weiss <krewecherl@gmail.com> - 2015-10-03 00:33 +0200
              Re: How to pass a php variable to a javascript file (function)? JiiPee <no@notvalid.com> - 2015-10-02 23:45 +0100
              Re: How to pass a php variable to a javascript file (function)? Tim Streater <timstreater@greenbee.net> - 2015-10-02 23:55 +0100
            Re: How to pass a php variable to a javascript file (function)? JiiPee <no@notvalid.com> - 2015-10-03 00:02 +0100
          Re: How to pass a php variable to a javascript file (function)? JiiPee <no@notvalid.com> - 2015-10-02 23:49 +0100
      Re: How to pass a php variable to a javascript file (function)? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-10-02 21:37 +0200
        Re: How to pass a php variable to a javascript file (function)? Stefan Weiss <krewecherl@gmail.com> - 2015-10-03 00:34 +0200
          Re: How to pass a php variable to a javascript file (function)? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-10-03 04:35 +0200
            Re: How to pass a php variable to a javascript file (function)? Stefan Weiss <krewecherl@gmail.com> - 2015-10-05 01:11 +0200
              Re: How to pass a php variable to a javascript file (function)? Tim Streater <timstreater@greenbee.net> - 2015-10-05 09:13 +0100
              Re: How to pass a php variable to a javascript file (function)? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-10-06 03:30 +0200
                Re: How to pass a php variable to a javascript file (function)? Stefan Weiss <krewecherl@gmail.com> - 2015-10-10 00:27 +0200
        Re: How to pass a php variable to a javascript file (function)? Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2015-10-03 15:15 -0300
          Re: How to pass a php variable to a javascript file (function)? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-10-03 20:34 +0200
            Re: How to pass a php variable to a javascript file (function)? Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2015-10-03 15:59 -0300
              Re: How to pass a php variable to a javascript file (function)? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-10-03 22:15 +0200
    Re: How to pass a php variable to a javascript file (function)? JiiPee <no@notvalid.com> - 2015-10-02 11:36 +0100
      Re: How to pass a php variable to a javascript file (function)? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-10-02 16:34 +0200
        Re: How to pass a php variable to a javascript file (function)? JiiPee <no@notvalid.com> - 2015-10-02 16:00 +0100
          Re: How to pass a php variable to a javascript file (function)? Tim Streater <timstreater@greenbee.net> - 2015-10-02 16:03 +0100
            Re: How to pass a php variable to a javascript file (function)? JiiPee <no@notvalid.com> - 2015-10-02 17:08 +0100
  solution, thanks, seems like one suggestion lead to a solution JiiPee <no@notvalid.com> - 2015-10-02 17:07 +0100
    Re: solution, thanks, seems like one suggestion lead to a solution "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-10-02 20:29 +0200

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