how to convert php string ro javascript string?

[megetron]

hi,

I would like to convert a php string like "that's all folks!" to javascript string "that\'s all folks", so I can write something like:

diocument.write('<?$myString?>');

so of course i can replace ' with \' with replace function but is there a php function that do this for the specific charachter and for other special charchters too?

 

what is the best way do this?

Thanks guys,

 

[Jessica]

add_slashes should work

[requinix]

json_encode would be the function you're looking for.

[ManiacDan]

jesi, addslashes only seems to cause problems.  It isn't self-aware, and calling it twice often irreparably breaks a string.  It should be gone in a not-too-distant-future release of PHP.

[Jessica]

I don't know why you'd call it twice, but ok...I never use it, just popped into my mind for this.

[ManiacDan]

People call it twice because there's no way to tell if it's been called before, and there are built-in features of PHP (or used to be) that did it for you, so people ended up doubling or tripling up on slashes and it was a huge problem.

 

Not so much anymore thanks to magic_quotes being killed, but I still hate it.

[Jessica]

So are you saying that if you called json_encode on an already escaped string, it would not add extra slashes like add slashes would?

[ManiacDan]

Oh no it definitely would, I'm just prejudiced against addslashes because:

 

A)  There's always a better solution, addslashes was a hack from back in the day

 

B)  Addslashes combined with magic_quotes produced a significant number of threads in the PHP forums while it was still a default, and I got really sick of them

[Jessica]

So what does self-aware mean?

Sorry to derail the thread, I'm just trying to figure out what you meant

[ManiacDan]

Some other encoding functions won't step on their own toes (and double-encode things), just in case they're called twice.  I thought mysql_real_escape_string wouldn't double-encode things, but requinix (privately) told me I would be wrong if I mentioned that.

 

So ignore that bit, I thought there were other algorithms that behaved more intelligently than they do.