Hi every body,
I have a really serious question which is what is the difference
between $message & $$message, I know the uses of $message which is the
assigning of a variables and for the forms POST & GET, but what is the
uses of $$mesage
also I have another Database question, Its a question I've been asked
in an interview but am just a beginner in DataBase, the question was
that:
Company need to create a DB once and do no more edits in the future on
the DB, the DB contains Category name, Sub-category, sub-sub-category
so this means three level tree how to create a DB using this hierarchy
and in the future if the sub-sub got another sub how could this be
done without the need of a DB designer??
Thanks so much for all help in advance
shror 3 1278
On 10 Jan, 10:05, shror <shahi...@gmail .comwrote:
Hi every body,
I have a really serious question which is what is the difference
between $message & $$message, I know the uses of $message which is the
assigning of a variables and for the forms POST & GET, but what is the
uses of $$mesage
$message='hello ';
$hello='world';
print "$message $$message"; // writes "hello world"
print "$$hello"; // will give a warning because $world is not defined
also I have another Database question, Its a question I've been asked
in an interview but am just a beginner in DataBase, the question was
that:
Company need to create a DB once and do no more edits in the future on
the DB, the DB contains Category name, Sub-category, sub-sub-category
so this means three level tree how to create a DB using this hierarchy
and in the future if the sub-sub got another sub how could this be
done without the need of a DB designer??
Its trivial, there's lots of answers - but its way OT. Try asking in a
DB forum.
C.
On 10 Jan, 10:05, shror <shahi...@gmail .comwrote:
also I have another Database question, Its a question I've been asked
in an interview but am just a beginner in DataBase, the question was
that:
Company need to create a DB once and do no more edits in the future on
the DB, the DB contains Category name, Sub-category, sub-sub-category
so this means three level tree how to create a DB using this hierarchy
and in the future if the sub-sub got another sub how could this be
done without the need of a DB designer??
Take a look at: http://del.icio.us/Captain_Paralytic/hierarchical
..oO(shror)
>I have a really serious question which is what is the difference between $message & $$message, I know the uses of $message which is the assigning of a variables and for the forms POST & GET, but what is the uses of $$mesage
It's called a variable variable. But there's hardly a reason to use
them. Usually you can achieve the same with an associative array.
Variable variables http://www.php.net/manual/en/languag...s.variable.php
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