Re: [PHP] Using ' to access session variables?
If used outside any strings (like in your $query example) $_SESSION[foo] -- here foo technically is a constant and php ought to produce a notice $_SESSION['foo'] -- is the correct way as there is no doubt that foo is a string When used inside a string the rules are slightly altered @see http://www.php.net/manual/en/language.types.array.php section Array do's and don'ts Richard Friday, April 16, 2004, 6:32:11 PM, you wrote: > Whats the difference between $_SESSION[foo] and $_SESSION['foo'] I have been > using the 's but they seem to be unecessary? > I run into trouble if I try something like: > $query = " select * from table where (test.id = '$_SESSION['foo']') "; > but the following works: > $query = " select * from table where (test.id = '$_SESSION[foo]') "; > I know there is some way to properly escape characters but is there any > reason why I shouldn't just omit the 's? > Thanks! -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Using ' to access session variables?
Michal Migurski wrote:
Whats the difference between $_SESSION[foo] and $_SESSION['foo'] I have
been using the 's but they seem to be unecessary?
Use the single-quotes -- array references often work without them, but the
potential for conflict with constants and future PHP incompatibility is a
possibility. If you (or PHP) had a constant foo defined, it would behave
unexpectedly.
I run into trouble if I try something like:
$query = " select * from table where (test.id = '$_SESSION['foo']') ";
but the following works:
$query = " select * from table where (test.id = '$_SESSION[foo]') ";
http://www.php.net/manual/en/language.types.string.php#language.types.string.parsing
// Works but note that this works differently outside string-quotes
echo "A banana is $fruits[banana].";
// Works
echo "A banana is {$fruits['banana']}.";
// Works but PHP looks for a constant named banana first
// as described below.
echo "A banana is {$fruits[banana]}.";
// Won't work, use braces. This results in a parse error.
echo "A banana is $fruits['banana'].";
-
michal migurski- contact info and pgp key:
sf/cahttp://mike.teczno.com/contact.html
Or you could just use single quotes and concatenate.
echo 'A banana is '.$fruits['banana'].'.';
It may look bad here, but it's just fine when syntaxt highlighted. In
fact, more syntax highlighters will work on that than the in-string
version. IMHO, it's also more readable.
That being said, it's also slightly faster as PHP doesn't have to do any
variable finding/substritution in the string.
Of course, this is just my opinion.
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Re: [PHP] Using ' to access session variables?
>Whats the difference between $_SESSION[foo] and $_SESSION['foo'] I have
>been using the 's but they seem to be unecessary?
Use the single-quotes -- array references often work without them, but the
potential for conflict with constants and future PHP incompatibility is a
possibility. If you (or PHP) had a constant foo defined, it would behave
unexpectedly.
>I run into trouble if I try something like:
>$query = " select * from table where (test.id = '$_SESSION['foo']') ";
>but the following works:
>$query = " select * from table where (test.id = '$_SESSION[foo]') ";
http://www.php.net/manual/en/language.types.string.php#language.types.string.parsing
// Works but note that this works differently outside string-quotes
echo "A banana is $fruits[banana].";
// Works
echo "A banana is {$fruits['banana']}.";
// Works but PHP looks for a constant named banana first
// as described below.
echo "A banana is {$fruits[banana]}.";
// Won't work, use braces. This results in a parse error.
echo "A banana is $fruits['banana'].";
-
michal migurski- contact info and pgp key:
sf/cahttp://mike.teczno.com/contact.html
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Using ' to access session variables?
Whats the difference between $_SESSION[foo] and $_SESSION['foo'] I have been using the 's but they seem to be unecessary? I run into trouble if I try something like: $query = " select * from table where (test.id = '$_SESSION['foo']') "; but the following works: $query = " select * from table where (test.id = '$_SESSION[foo]') "; I know there is some way to properly escape characters but is there any reason why I shouldn't just omit the 's? Thanks! -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
