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 $fruits['banana'].";
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Or you could just use single quotes and concatenate. echo 'A banana is '.$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.
-- paperCrane <Justin Patrin>
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