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Array variable in echo statement [message #169782]

Sun, 26 September 2010 18:24

MikeB
Messages: 65
Registered: September 2010

Karma: 0

Member

I tried this and it didn't work as I was hoping:

foreach ($_COOKIE as $c) {
$ck = key($_COOKIE);
echo " Cookie: Key:\"{key($_COOKIE)}\" value:\"$c\"";
}

Now while I got this to work:

foreach ($_COOKIE as $ck => $c) {
echo " Cookie: Key:\"$ck\" value:\"$c\"";
}

I'd still like to know why the curly braces in the first example didn't
resolve the array function - I thought that was what they were supposed
to do?

Thanks, as usual.

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Re: Array variable in echo statement [message #169783 is a reply to message #169782]

Sun, 26 September 2010 18:41

Marious Barrier
Messages: 25
Registered: September 2010

Karma: 0

Junior Member

On 09/26/2010 02:24 PM, MikeB wrote:
>
> I tried this and it didn't work as I was hoping:
>
> foreach ($_COOKIE as $c) {
> $ck = key($_COOKIE);
> echo " Cookie: Key:\"{key($_COOKIE)}\" value:\"$c\"";
> }
>
> Now while I got this to work:
>
> foreach ($_COOKIE as $ck => $c) {
> echo " Cookie: Key:\"$ck\" value:\"$c\"";
> }
>
> I'd still like to know why the curly braces in the first example didn't
> resolve the array function - I thought that was what they were supposed
> to do

The curly braces are meant to wrap array variables, not functions.

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Re: Array variable in echo statement [message #169784 is a reply to message #169783]

Sun, 26 September 2010 18:59

MikeB
Messages: 65
Registered: September 2010

Karma: 0

Member

Marious Barrier wrote:
> On 09/26/2010 02:24 PM, MikeB wrote:
>>
>> I tried this and it didn't work as I was hoping:
>>
>> foreach ($_COOKIE as $c) {
>> $ck = key($_COOKIE);
>> echo " Cookie: Key:\"{key($_COOKIE)}\" value:\"$c\"";
>> }
>>
>> Now while I got this to work:
>>
>> foreach ($_COOKIE as $ck => $c) {
>> echo " Cookie: Key:\"$ck\" value:\"$c\"";
>> }
>>
>> I'd still like to know why the curly braces in the first example didn't
>> resolve the array function - I thought that was what they were supposed
>> to do
>
> The curly braces are meant to wrap array variables, not functions.

Right. Thanks. So that mean that if I want the result of a function in
an output statement I should put it in a variable prior to the output
statement?

Like this:

$ck=key($_COOKIE);
echo "The key is $ck";

rather than:

echo "The key is key($_COOKIE)";

Which I know won't work and is why I thought the curly braces was meant
to resolve, but I guess I misread/misunderstood that part as well.

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Re: Array variable in echo statement [message #169785 is a reply to message #169784]

Sun, 26 September 2010 19:10

Marious Barrier
Messages: 25
Registered: September 2010

Karma: 0

Junior Member

On 09/26/2010 02:59 PM, MikeB wrote:
> Right. Thanks. So that mean that if I want the result of a function in
> an output statement I should put it in a variable prior to the output
> statement?
>
> Like this:
>
> $ck=key($_COOKIE);
> echo "The key is $ck";
>
> rather than:
>
> echo "The key is key($_COOKIE)";
>
> Which I know won't work and is why I thought the curly braces was meant
> to resolve, but I guess I misread/misunderstood that part as well.

All is correct.

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Re: Array variable in echo statement [message #169786 is a reply to message #169784]

Sun, 26 September 2010 19:22

Captain Paralytic
Messages: 204
Registered: September 2010

Karma: 0

Senior Member

On Sep 26, 7:59 pm, MikeB <mpbr...@gmail.com> wrote:
> Marious Barrier wrote:
>> On 09/26/2010 02:24 PM, MikeB wrote:
>
>>> I tried this and it didn't work as I was hoping:
>
>>> foreach ($_COOKIE as $c) {
>>> $ck = key($_COOKIE);
>>> echo " Cookie: Key:\"{key($_COOKIE)}\" value:\"$c\"";
>>> }
>
>>> Now while I got this to work:
>
>>> foreach ($_COOKIE as $ck => $c) {
>>> echo " Cookie: Key:\"$ck\" value:\"$c\"";
>>> }
>
>>> I'd still like to know why the curly braces in the first example didn't
>>> resolve the array function - I thought that was what they were supposed
>>> to do
>
>> The curly braces are meant to wrap array variables, not functions.
>
> Right. Thanks. So that mean that if I want the result of a function in
> an output statement I should put it in a variable prior to the output
> statement?
>
> Like this:
>
> $ck=key($_COOKIE);
> echo "The key is $ck";
>
> rather than:
>
> echo "The key is key($_COOKIE)";
>
> Which I know won't work and is why I thought the curly braces was meant
> to resolve, but I guess I misread/misunderstood that part as well.

Or:
echo 'The key is '.key($_COOKIE);

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Re: Array variable in echo statement [message #169787 is a reply to message #169784]

Sun, 26 September 2010 20:46

Michael Fesser
Messages: 215
Registered: September 2010

Karma: 0

Senior Member

.oO(MikeB)

> Marious Barrier wrote:
>>
>> The curly braces are meant to wrap array variables, not functions.
>
> Right. Thanks. So that mean that if I want the result of a function in
> an output statement I should put it in a variable prior to the output
> statement?
>
> Like this:
>
> $ck=key($_COOKIE);
> echo "The key is $ck";

Yes. Or have a look at printf(), which is extremely handy in situations
like this, especially if there are more than one variable:

printf('The key is %s.', key($_COOKIE));

Micha

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