first even php code

[WindAndWaves]

Hi gurus

This is my first ever, ever PHP script. I have called the page tt.php. Can
someone tell me if I have done it right? I have a My SQL database with a
table called messages with fields name and description.

Thank you.

- Nicolaas

<?php


function tt($vname){
include_once("c onnectDB.php");
$sql = "SELECT * FROM messages WHERE Name='$vname'";
$result = mysql_query($sq l);
$myrow = mysql_fetch_arr ay($result);
$message = $myrow['Description'];
//Close the database connection
mysql_close();
return $message

}
?>

[kicken]

Re: first even php code

WindAndWaves wrote:[color=blue]
> Hi gurus
>
> This is my first ever, ever PHP script. I have called the page tt.php. Can
> someone tell me if I have done it right? I have a My SQL database with a
> table called messages with fields name and description.
>
> Thank you.
>
> - Nicolaas
>
> <?php
>
>
> function tt($vname){
> include_once("c onnectDB.php");
> $sql = "SELECT * FROM messages WHERE Name='$vname'";
> $result = mysql_query($sq l);
> $myrow = mysql_fetch_arr ay($result);
> $message = $myrow['Description'];
> //Close the database connection
> mysql_close();
> return $message
>
> }
> ?>
>
>[/color]

Looks ok to me syntax wise. That alone won't do anything though as you
have to have some code outside the function which will call the tt
function with some name as the argument.
Example:

tt('WindAndWave s');

Also, usually it's better to select the file names, and not select *.
In your case you have such a small table it won't hurt, but if you
select * and only use a couple fields, you're wasting memory by pulling
unneccesary fields. Like here you only use the Description field, so
doing "SELECT Description FROM message WHERE Name='$vname'" would be better.

Lastly, your include_once call should probably be outside the function's
scope, likewise you should move the mysql_close call outside the
function. Multiple calls to this function will likely not work because
the first call would close the connection to the database, and the later
calles would not reopen it and thus produce errors.

So, syntatically, it seems fine. Logically, needs some work.

<?php

include_once("c onnectDB.php"); // I assume this file does mysql_connect
// and mysql_select_db .

function tt($vname){
$sql = "SELECT Description FROM messages WHERE Name='$vname'";
$result = mysql_query($sq l);
$myrow = mysql_fetch_arr ay($result);
$message = $myrow['Description'];
return $message

}

echo tt('WindAndWave s');
echo '<br />'.tt('kicken') ;

//Close the database connection
mysql_close();
?>

[WindAndWaves]

Re: first even php code


"kicken" <slick@aoeex.co m> wrote in message
news:MO6dnREKVt S6ukLcRVn-oQ@bresnan.com. ..[color=blue]
> WindAndWaves wrote:[color=green]
> > Hi gurus
> >
> > This is my first ever, ever PHP script. I have called the page tt.php.[/color][/color]
Can[color=blue][color=green]
> > someone tell me if I have done it right? I have a My SQL database with[/color][/color]
a[color=blue][color=green]
> > table called messages with fields name and description.
> >
> > Thank you.
> >
> > - Nicolaas
> >
> > <?php
> >
> >
> > function tt($vname){
> > include_once("c onnectDB.php");
> > $sql = "SELECT * FROM messages WHERE Name='$vname'";
> > $result = mysql_query($sq l);
> > $myrow = mysql_fetch_arr ay($result);
> > $message = $myrow['Description'];
> > //Close the database connection
> > mysql_close();
> > return $message
> >
> > }
> > ?>
> >
> >[/color]
>
> Looks ok to me syntax wise. That alone won't do anything though as you
> have to have some code outside the function which will call the tt
> function with some name as the argument.
> Example:
>
> tt('WindAndWave s');
>
> Also, usually it's better to select the file names, and not select *.
> In your case you have such a small table it won't hurt, but if you
> select * and only use a couple fields, you're wasting memory by pulling
> unneccesary fields. Like here you only use the Description field, so
> doing "SELECT Description FROM message WHERE Name='$vname'" would be[/color]
better.[color=blue]
>
> Lastly, your include_once call should probably be outside the function's
> scope, likewise you should move the mysql_close call outside the
> function. Multiple calls to this function will likely not work because
> the first call would close the connection to the database, and the later
> calles would not reopen it and thus produce errors.
>
> So, syntatically, it seems fine. Logically, needs some work.
>
> <?php
>
> include_once("c onnectDB.php"); // I assume this file does mysql_connect
> // and mysql_select_db .
>
> function tt($vname){
> $sql = "SELECT Description FROM messages WHERE Name='$vname'";
> $result = mysql_query($sq l);
> $myrow = mysql_fetch_arr ay($result);
> $message = $myrow['Description'];
> return $message
>
> }
>
> echo tt('WindAndWave s');
> echo '<br />'.tt('kicken') ;
>
> //Close the database connection
> mysql_close();
> ?>[/color]

Thank you for your reply. What I perhaps should have mentioned is that I
wanted to use it in another php file to add text bits and pieces. In that
way I can keep the code short in the other php files. I hope that makes
sense. The way I get it in the other php file would be as follows:

include_once("t t.php");

$msg = tt('kicken');

is this correct?



Thanks again



- Nicolaas

[kicken]

Re: first even php code

WindAndWaves wrote:[color=blue]
> "kicken" <slick@aoeex.co m> wrote in message
> news:MO6dnREKVt S6ukLcRVn-oQ@bresnan.com. ..
>[color=green]
>>[snip][/color]
>[color=green]
>>Lastly, your include_once call should probably be outside the function's
>>scope, likewise you should move the mysql_close call outside the
>>function. Multiple calls to this function will likely not work because
>>the first call would close the connection to the database, and the later
>>calles would not reopen it and thus produce errors.
>>
>>So, syntatically, it seems fine. Logically, needs some work.
>>
>><?php
>>
>>include_once( "connectDB.php" ); // I assume this file does mysql_connect
>>// and mysql_select_db .
>>
>>function tt($vname){
>> $sql = "SELECT Description FROM messages WHERE Name='$vname'";
>> $result = mysql_query($sq l);
>> $myrow = mysql_fetch_arr ay($result);
>> $message = $myrow['Description'];
>> return $message
>>
>>}
>>
>>echo tt('WindAndWave s');
>>echo '<br />'.tt('kicken') ;
>>
>>//Close the database connection
>>mysql_close() ;
>>?>[/color]
>
>
> Thank you for your reply. What I perhaps should have mentioned is that I
> wanted to use it in another php file to add text bits and pieces. In that
> way I can keep the code short in the other php files. I hope that makes
> sense. The way I get it in the other php file would be as follows:
>
> include_once("t t.php");
>
> $msg = tt('kicken');
>
> is this correct?
>[/color]

That will work fine, however my comment about the including of
connectDB.php and the placement of mysql_close is still something that
you need to consider if you plan to call the tt function multiple times.

include_once('c onnectDB.php');
include_once('t t.php');
$msg = tt('kicken');
mysql_close();

[Chung Leong]

Re: first even php code

"WindAndWav es" <access@ngaru.c om> wrote in message
news:ueFDd.5803 $mo2.399708@new s.xtra.co.nz...[color=blue]
> Hi gurus
>
> This is my first ever, ever PHP script. I have called the page tt.php.[/color]
Can[color=blue]
> someone tell me if I have done it right? I have a My SQL database with a
> table called messages with fields name and description.
>
> Thank you.
>
> - Nicolaas
>
> <?php
>
>
> function tt($vname){
> include_once("c onnectDB.php");
> $sql = "SELECT * FROM messages WHERE Name='$vname'";
> $result = mysql_query($sq l);
> $myrow = mysql_fetch_arr ay($result);
> $message = $myrow['Description'];
> //Close the database connection
> mysql_close();
> return $message
>
> }
> ?>[/color]

Using include/require statements in lieu of a function call is a bad
practice. Something shouldn't happen just because you include a file. The
following is better:

function tt($vname){
connectDB();
$sql = "SELECT * FROM messages WHERE Name='$vname'";
$result = mysql_query($sq l);
$myrow = mysql_fetch_arr ay($result);
$message = $myrow['Description'];
return $message
}

Where connectDB() is a function defined earlier or in an include file. If
there's no connection, it makes one. Otherwise it does nothing.

[WindAndWaves]

Re: first even php code


"kicken" <slick@aoeex.co m> wrote in message
news:PP6dnbltOb 3MMULcRVn-iw@bresnan.com. ..[color=blue]
> WindAndWaves wrote:[color=green]
> > "kicken" <slick@aoeex.co m> wrote in message
> > news:MO6dnREKVt S6ukLcRVn-oQ@bresnan.com. ..
> >[color=darkred]
> >>[snip][/color]
> >[color=darkred]
> >>Lastly, your include_once call should probably be outside the function's
> >>scope, likewise you should move the mysql_close call outside the
> >>function. Multiple calls to this function will likely not work because
> >>the first call would close the connection to the database, and the later
> >>calles would not reopen it and thus produce errors.
> >>
> >>So, syntatically, it seems fine. Logically, needs some work.
> >>
> >><?php
> >>
> >>include_once( "connectDB.php" ); // I assume this file does mysql_connect
> >>// and mysql_select_db .
> >>
> >>function tt($vname){
> >> $sql = "SELECT Description FROM messages WHERE Name='$vname'";
> >> $result = mysql_query($sq l);
> >> $myrow = mysql_fetch_arr ay($result);
> >> $message = $myrow['Description'];
> >> return $message
> >>
> >>}
> >>
> >>echo tt('WindAndWave s');
> >>echo '<br />'.tt('kicken') ;
> >>
> >>//Close the database connection
> >>mysql_close() ;
> >>?>[/color]
> >
> >
> > Thank you for your reply. What I perhaps should have mentioned is that[/color][/color]
I[color=blue][color=green]
> > wanted to use it in another php file to add text bits and pieces. In[/color][/color]
that[color=blue][color=green]
> > way I can keep the code short in the other php files. I hope that makes
> > sense. The way I get it in the other php file would be as follows:
> >
> > include_once("t t.php");
> >
> > $msg = tt('kicken');
> >
> > is this correct?
> >[/color]
>
> That will work fine, however my comment about the including of
> connectDB.php and the placement of mysql_close is still something that
> you need to consider if you plan to call the tt function multiple times.
>
> include_once('c onnectDB.php');
> include_once('t t.php');
> $msg = tt('kicken');
> mysql_close();[/color]

I have tried to implement the tt function, but now, when I try to change the
header, anywhere in the SQL, i get the following error:

Cannot modify header information - headers already sent by (output started
at .... tt.php:24) in ...email.php on line 204

Can you explain me what I do wrong (remember I am a complete novice!)

Thank you

- Nicolaas

[kicken]

Re: first even php code

WindAndWaves wrote:[color=blue]
>
> I have tried to implement the tt function, but now, when I try to change the
> header, anywhere in the SQL, i get the following error:
>
> Cannot modify header information - headers already sent by (output started
> at .... tt.php:24) in ...email.php on line 204
>
> Can you explain me what I do wrong (remember I am a complete novice!)
>
> Thank you
>
> - Nicolaas
>
>[/color]

Whenever you use any kind of function in PHP which sends data to the
browser (eg, echo, print, printf, readfile, ...) or have any data
outside of the <?php and ?> tags (including spaces, newlines, etc) then
you can no longer use any function which require modification to the
request headers (eg, header(), setcookie(), session_start() ).

The reason for this is that the header of the request must come prior to
the body. Once you send data to the brower by some means, PHP much
compile the header and send it, then send your output.

What kind of headers are you trying to send, where are you trying to
send them from? Make sure there's no output prior to the call to
header. According to the error, your output began on line 24 of tt.php.
Not sure how long your tt function is now, but I'm thinking maybe you
just have something outside the ?> php tag. Perhaps an ending new line
or such?

[WindAndWaves]

Re: first even php code


"kicken" <slick@aoeex.co m> wrote in message
news:tqCdnVGVN9 IeRXncRVn-oA@bresnan.com. ..[color=blue]
> WindAndWaves wrote:[color=green]
> >
> > I have tried to implement the tt function, but now, when I try to change[/color][/color]
the[color=blue][color=green]
> > header, anywhere in the SQL, i get the following error:
> >
> > Cannot modify header information - headers already sent by (output[/color][/color]
started[color=blue][color=green]
> > at .... tt.php:24) in ...email.php on line 204
> >
> > Can you explain me what I do wrong (remember I am a complete novice!)
> >
> > Thank you
> >
> > - Nicolaas
> >
> >[/color]
>
> Whenever you use any kind of function in PHP which sends data to the
> browser (eg, echo, print, printf, readfile, ...) or have any data
> outside of the <?php and ?> tags (including spaces, newlines, etc) then
> you can no longer use any function which require modification to the
> request headers (eg, header(), setcookie(), session_start() ).
>
> The reason for this is that the header of the request must come prior to
> the body. Once you send data to the brower by some means, PHP much
> compile the header and send it, then send your output.
>
> What kind of headers are you trying to send, where are you trying to
> send them from? Make sure there's no output prior to the call to
> header. According to the error, your output began on line 24 of tt.php.
> Not sure how long your tt function is now, but I'm thinking maybe you
> just have something outside the ?> php tag. Perhaps an ending new line
> or such?[/color]

Hmm,

What happens is this


Main page::

<? ..... tt ......headercha nge ....>
with the tt page called and included once

I changed it around to:

<? ....... header change .... tt ......?>

and now it works, but it leaves me pretty limited in terms of the use of tt,
as all my pages change the headers several time.

I also had some empty lines after the } character in my tt function, does
that matter?

TIA

- Nicolaas