difference between ' and "

[Jochem]

Today I spent a couple of hours searching for a bug, until I finally
found out that the problems was the following:

Correct: $path_upload = "$path/$file";

Instead of:

Wrong: $path_upload = '$path/$file';

Note a difference in quotation marks. Since I have been programming in
PHP I found out that there is very little difference between ' and ",
but is there somebody who can explain me, when to use ' and when to
use ". It would be really great if there is somebody to explain this
to me!

Thanks,
Jochem

[Pedro Graca]

Re: difference between ' and "

Jochem wrote:[color=blue]
> Since I have been programming in
> PHP I found out that there is very little difference between ' and ",
> but is there somebody who can explain me, when to use ' and when to
> use ". It would be really great if there is somebody to explain this
> to me![/color]

*NEVER* use ", unless you _need_ them

I only need " for two things:
embedding \n, \t and similar
simplify SQL queries, but I don't have to like it :)

$name1 = 'Pedro Graca'; // ok
$name2 = "Pedro Graca"; // forces PHP to do extra work
$name3 = $name1; // ok
$name4 = "$name2"; // UGH! *TRIPLE* UGH!!!!
// people who do this should be whipped


echo 'Your name is: ', $name, "<br/>\n";

$sql = "insert into table values($new_id, '$new_name')";


// for comparison here is the echo with only " (simpler, but not needed)
// echo "Your name is: $name<br/>\n";

// and the $sql with only ' (more awkward)
// $sql = 'insert into table values(' . $new_id . ', \'' . $new_name . '\')';
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[Tim Van Wassenhove]

Re: difference between ' and &quot;

On 2003-12-30, Jochem <jdonkers@opera mail.com> wrote:[color=blue]
> Today I spent a couple of hours searching for a bug, until I finally
> found out that the problems was the following:
>
> Correct: $path_upload = "$path/$file";
>
> Instead of:
>
> Wrong: $path_upload = '$path/$file';
>
> Note a difference in quotation marks. Since I have been programming in
> PHP I found out that there is very little difference between ' and ",
> but is there somebody who can explain me, when to use ' and when to
> use ". It would be really great if there is somebody to explain this
> to me![/color]

http://www.php.net/manual/en/language.types.string.php

--
verum ipsum factum

[Tim Van Wassenhove]

Re: difference between ' and &quot;

On 2003-12-30, Pedro Graca <hexkid@hotpop. com> wrote:
[color=blue]
> $name4 = "$name2"; // UGH! *TRIPLE* UGH!!!!
> // people who do this should be whipped[/color]

I think people only come up with this one if they have a Bash background
;)


[color=blue]
> // for comparison here is the echo with only " (simpler, but not needed)
> // echo "Your name is: $name<br/>\n";[/color]

In this case you would need: "Your name is: {$name}<br>\n";

--
verum ipsum factum

[Drebbel]

Re: difference between ' and &quot;

Jochem wrote:[color=blue]
> Today I spent a couple of hours searching for a bug, until I finally
> found out that the problems was the following:
>
> Correct: $path_upload = "$path/$file";
>
> Instead of:
>
> Wrong: $path_upload = '$path/$file';
>
> Note a difference in quotation marks. Since I have been programming in
> PHP I found out that there is very little difference between ' and ",
> but is there somebody who can explain me, when to use ' and when to
> use ". It would be really great if there is somebody to explain this
> to me![/color]

Main difference to me is that when using "" php is looking for variables
between the "".

- D -

[Agelmar]

Re: difference between ' and &quot;

Tim Van Wassenhove wrote:[color=blue]
> On 2003-12-30, Pedro Graca <hexkid@hotpop. com> wrote:
>[color=green]
>> $name4 = "$name2"; // UGH! *TRIPLE* UGH!!!!
>> // people who do this should be whipped[/color]
>
> I think people only come up with this one if they have a Bash
> background ;)
>
>
>[color=green]
>> // for comparison here is the echo with only " (simpler, but not
>> needed) // echo "Your name is: $name<br/>\n";[/color]
>
> In this case you would need: "Your name is: {$name}<br>\n";[/color]

Actually no,
echo "Some variable is $somevar dude!"; is perfectly fine. You only need { }
for arrays inside a string, e.g.
echo "Some variable is {$somevar['name']} dude!";
although inside of a string you can leave off the quotes on the key and have
echo "Some variable is $somevar[name] dude!";
While the last is proper according to the manual, I find it poor form and
prefer "somevar is {$something['blah']}".

[Tim Van Wassenhove]

Re: difference between ' and &quot;

On 2003-12-30, Agelmar <ifetteNOSPAM@c omcast.net> wrote:[color=blue]
> Tim Van Wassenhove wrote:[color=green]
>> On 2003-12-30, Pedro Graca <hexkid@hotpop. com> wrote:
>>[color=darkred]
>>> $name4 = "$name2"; // UGH! *TRIPLE* UGH!!!!
>>> // people who do this should be whipped[/color]
>>
>> I think people only come up with this one if they have a Bash
>> background ;)
>>
>>
>>[color=darkred]
>>> // for comparison here is the echo with only " (simpler, but not
>>> needed) // echo "Your name is: $name<br/>\n";[/color]
>>
>> In this case you would need: "Your name is: {$name}<br>\n";[/color]
>
> Actually no,
> echo "Some variable is $somevar dude!"; is perfectly fine. You only need { }
> for arrays inside a string, e.g.[/color]

Actually yes, the OP wrote: echo "Your name is: $name<br/>\n";
No space between the variable and <br>.
[color=blue]
> echo "Some variable is {$somevar['name']} dude!";
> although inside of a string you can leave off the quotes on the key and have
> echo "Some variable is $somevar[name] dude!";
> While the last is proper according to the manual, I find it poor form and
> prefer "somevar is {$something['blah']}".[/color]

Not using quotes is not only poor, it is also slower.


--
verum ipsum factum

[John Dunlop]

Re: difference between ' and &quot;

Tim Van Wassenhove wrote:
[color=blue]
> Actually yes,[/color]

Actually no. SCNR. ;-)
[color=blue]
> the OP wrote: echo "Your name is: $name<br/>\n";
> No space between the variable and <br>.[/color]

A LESS-THAN SIGN, just like a SPACE, isn't a valid variable name
character, so the variable $name will be recognised.

http://www.php.net/manual/en/language.variables.php

--
Jock

[Five Cats]

Re: difference between ' and &quot;

In message <bsrv9f$pkjk$1@ ID-203069.news.uni-berlin.de>, Pedro Graca
<hexkid@hotpop. com> writes
<snip>[color=blue]
>
>$name1 = 'Pedro Graca'; // ok
>$name2 = "Pedro Graca"; // forces PHP to do extra work[/color]
<snip>

Could you explain why the double quotes make PHP do more work than the
single quotes, please?

--
Five Cats
Email to: cats_spam at uk2 dot net

[Andy Fraser]

Re: difference between ' and &quot;

Five Cats uttered the immortal words:
[color=blue]
> <snip>[color=green]
>>
>>$name1 = 'Pedro Graca'; // ok
>>$name2 = "Pedro Graca"; // forces PHP to do extra work[/color]
> <snip>
>
> Could you explain why the double quotes make PHP do more work than the
> single quotes, please?[/color]

Click the link Tim posted in his first post to this thread.

--
Andy.

[SwissCheese]

Re: difference between ' and &quot;

"Five Cats" <cats_spam@[127.0.0.1]> wrote in message
news:WvzZFbF4FF 9$EwdB@[127.0.0.1]...[color=blue]
> In message <bsrv9f$pkjk$1@ ID-203069.news.uni-berlin.de>, Pedro Graca
> <hexkid@hotpop. com> writes
> <snip>[color=green]
> >
> >$name1 = 'Pedro Graca'; // ok
> >$name2 = "Pedro Graca"; // forces PHP to do extra work[/color]
> <snip>
>
> Could you explain why the double quotes make PHP do more work than the
> single quotes, please?
>
> --
> Five Cats
> Email to: cats_spam at uk2 dot net
>[/color]

Bottom line: PHP parses anything in " " looking for variables to replace
with values, anything in ' ' it does not.