| Re: How to convert this PHP into JavaScript [message #173195 is a reply to message #173176] |
Sun, 27 March 2011 01:38   |
sheldonlg
Messages: 166
Registered: September 2010
Karma:
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Senior Member |
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On 3/26/2011 2:03 AM, Curtis Dyer wrote:
> sheldonlg<sheldonlg(at)thevillages(dot)net> wrote:
>
>> On 3/25/2011 5:01 PM, Jerry Stuckle wrote:
>>> On 3/25/2011 4:51 PM, Denis McMahon wrote:
>>>> On Fri, 25 Mar 2011 15:22:42 -0400, Jerry Stuckle wrote:
>>>>
>>>> > On 3/25/2011 2:59 PM, sheldonlg wrote:
>>>> >> On 3/24/2011 12:50 PM, Jerry Stuckle wrote:
>>>> >>> On 3/24/2011 10:23 AM, Oltmans wrote:
>>>> >>>> Hi PHP gurus, I hope you're doing well.
>>>> >>>>
>>>> >>>> I'm trying to convert a PHP script into JavaScript. I'm
>>>> >>>> posting here because I don't know much PHP and I hope
>>>> >>>> someone among you can help. Here is the PHP
>
> <snip>
>
>>>> >>> If you want to write javascript, you should ask in a
>>>> >>> javascript newsgroup.
>>>> >>>
>>>> >> No Jerry, not this time. He has a PHP array and he wants to
>>>> >> use that PHP array to generate a script in javascript. That
>>>> >> means that knowledge of BOTH is required.
>
> This is one of those cases in which I feel that cross-posting is
> viable. The problem here is that the OP needs advice on how to
> generate *quality* target code from PHP. Therefore, quality
> JavaScript advice form people who are aware of subtle issues like
> automatic semi-colon insertion (ASI), ECMAScript string literal
> syntax, etc. are necessary.
>
> <snip>
>
>> I just, two days ago, had a need to do just that. What I did
>> was:
>
> I would consider outputting the below outside of PHP tags or
> perhaps using heredoc syntax.
>
>> print "<script>\n";
>> print " var foo = new Array();\n";
>
> Less verbose would be:
>
> var foo = [];
>
>> print " foo[0] = " . $foo[0] . ";\n";
>
> You give no evidence here that `$foo[0]' is properly escaped to be
> included in a string literal. There are important differences
> between PHP's and JavaScript's one needs to keep in mind. In
> addition to properly escaping quotes and backslashes, one needs to
> take care that the JavaScript string literal has no actual line
> terminators hard coded into it:
>
> /* Invalid JavaScript string literal */
> var foo = "bar
> baz";
>
> If I haven't missed anything, one way to escape the output for
> JavaScript in PHP might look like:
>
> $escaped = addcslashes($foo[0], "\"\n\r\\'");
>
> <snip>
>
It was an EXAMPLE written here to show a method. It was untested and
not necessarily complete. Furthermore, I am one of those whose language
is PHP and know more than a little, but far from expert in javascript.
That is why this is in the PHP group.
--
Shelly
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