Re: [PHP] Re: How to declare Vars in PHP?
Next time you double post(I'm assuming by accident), could you reply to one, of the posts declaring it void, and point people to the other, so that you don't have two people answering the same question in two different threads. On 5/5/05, Ryan Faricy <[EMAIL PROTECTED]> wrote: > > "Jon M." <[EMAIL PROTECTED]> wrote in message > news:[EMAIL PROTECTED] > >I know it's not necessary, but I still want to know how. > > > > > > I know in JavaScript, that you declare vars like so: > > > > var = variableName; > > > > So I'm assuming that in PHP you do it like this: > > > > var = $variableName; > > > > But there doesn't seem to be a single shred of documentation on PHP.net > > (or in ANY book) that covers this. All they say is that it's good > > practice, but not necessary. Then they always skip telling you how. > > > > I always like to declare vars since it helps me keep track of the vars I > > will be using, and I just like to do things right. > > > > So am I right about how you do it? "Yes", "No", example please?? > > > > > > -Jon > > It is good practice to define your variables (i.e., set them to 0, or empty, > etc) at the beginning of a script, for security and reliability reasons. > > With PHP however, there technically is no definition of variables as in > other languages such as Java or BASIC. To define a variable in PHP simply > requires a $variableName = ''; or $variableName = 0; or $variableName = > empty; etc etc. A variable is defined as soon as a value is set for it, > therefore to define a variable, simply give it a value. > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Re: How to declare Vars in PHP?
OK, thanks everyone. (BTW -I actually meant to say 'var $varName;' in PHP and 'var varName;' in JavaScript -doh!) Anyway, my question has been thoroughly answered, and I completely understand now. I did try the "var $varName;" outside a class, just to see what happened, and found out it does indeed throw a parse error, so I'll just use a comment as Mr. Rasmus suggested. I wonder why "Beginning PHP 5 and MySQL from Novice to Professional by W. Jason Gilmore" says to declare them? I guess he just meant by assigning a value like: $varName = Null or something. I just have to get used to this new way of "declaring" -lol. And thanks especially Ryan. That is a very informational answer, and gives me a much deeper insight into why PHP doesn't allow an actual definition, than any other resource/explanation I have ever seen! Thank you VERY much for taking the time to write that, I am the kind of person who wants to completely understand a subject (not just "how", but, "why" as well), and now I completely understand this particular part of PHP. -Jon "Ryan Faricy" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > > "Jon M." <[EMAIL PROTECTED]> wrote in message > news:[EMAIL PROTECTED] >>I know it's not necessary, but I still want to know how. >> >> >> I know in JavaScript, that you declare vars like so: >> >> var = variableName; >> >> So I'm assuming that in PHP you do it like this: >> >> var = $variableName; >> >> But there doesn't seem to be a single shred of documentation on PHP.net >> (or in ANY book) that covers this. All they say is that it's good >> practice, but not necessary. Then they always skip telling you how. >> >> I always like to declare vars since it helps me keep track of the vars I >> will be using, and I just like to do things right. >> >> So am I right about how you do it? "Yes", "No", example please?? >> >> >> -Jon > > It is good practice to define your variables (i.e., set them to 0, or > empty, etc) at the beginning of a script, for security and reliability > reasons. > > With PHP however, there technically is no definition of variables as in > other languages such as Java or BASIC. To define a variable in PHP simply > requires a $variableName = ''; or $variableName = 0; or $variableName = > empty; etc etc. A variable is defined as soon as a value is set for it, > therefore to define a variable, simply give it a value. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Re: How to declare Vars in PHP?
"Jon M." <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] >I know it's not necessary, but I still want to know how. > > > I know in JavaScript, that you declare vars like so: > > var = variableName; > > So I'm assuming that in PHP you do it like this: > > var = $variableName; > > But there doesn't seem to be a single shred of documentation on PHP.net > (or in ANY book) that covers this. All they say is that it's good > practice, but not necessary. Then they always skip telling you how. > > I always like to declare vars since it helps me keep track of the vars I > will be using, and I just like to do things right. > > So am I right about how you do it? "Yes", "No", example please?? > > > -Jon It is good practice to define your variables (i.e., set them to 0, or empty, etc) at the beginning of a script, for security and reliability reasons. With PHP however, there technically is no definition of variables as in other languages such as Java or BASIC. To define a variable in PHP simply requires a $variableName = ''; or $variableName = 0; or $variableName = empty; etc etc. A variable is defined as soon as a value is set for it, therefore to define a variable, simply give it a value. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
