How to create a table from PHP?

[mh]

Hello,

I'm trying to create a table from a PHP script.[color=blue]
>From what I read in my book about PHP and MySQL I[/color]
should do something like that:

$sql_query="CRE ATE TABLE '$num' (
'variable1' mediumint(6) unsigned NOT
NULL,

'variable2' smallint(6) unsigned NOT NULL,
PRIMARY KEY(numero),
)";
First I tried without the 'primary key' and the '' for
the names of the variables. My script was not creating
the table so I decided to add the '' and the "primary
key". It was still not working. Then I've found that
this is working:

$sql_query = 'CREATE TABLE $num ('
. ' `variable1` DATE NOT NULL'
. ' )';

I'd like to know why my first test was not working
(cause it is similar to a listing in a book) and if I
really need (it's related) to use the '.' between each
line of my command?

Another problem is that the table is created with the
name $num and is not replaced like I want by its
value. How can I solve this other problem?

Thanks a lot for your help.

[Andy Hassall]

Re: How to create a table from PHP?

On 17 Jul 2005 09:42:34 -0700, "mh" <marchenri1@gma il.com> wrote:
[color=blue]
>$sql_query="CR EATE TABLE '$num' ([/color]

Don't put quotes around identifier names. If you must, then in MySQL use
either ` or ", but not '. ' is for strings, not identifiers.

--
Andy Hassall / <andy@andyh.co. uk> / <http://www.andyh.co.uk >
<http://www.andyhsoftwa re.co.uk/space> Space: disk usage analysis tool

[mh]

Re: How to create a table from PHP?

Hello,

Andy Hassall a écrit :[color=blue]
> On 17 Jul 2005 09:42:34 -0700, "mh" <marchenri1@gma il.com> wrote:
>[color=green]
> >$sql_query="CR EATE TABLE '$num' ([/color]
>
> Don't put quotes around identifier names. If you must, then in MySQL use
> either ` or ", but not '. ' is for strings, not identifiers.[/color]
Ok, but I did that I think. I said in my message that I also tried like
that:
$sql_query = 'CREATE TABLE $num ('
. ' `variable1` DATE NOT NULL'
. ' )';
In this case I don't use the quotes around the name of the table but
MySQL still creates a table called $num and doesn't replace the
variable $num but its value like I wish.

I also tried:
$sql_query="CRE ATE TABLE $num (variable DATE NOT NULL)";
but without success.
I feel that I tried every possible combiantion without success. There
must be a solution. But what is it?

[Jerry Stuckle]

Re: How to create a table from PHP?

mh wrote:[color=blue]
> Hello,
>
> Andy Hassall a écrit :
>[color=green]
>>On 17 Jul 2005 09:42:34 -0700, "mh" <marchenri1@gma il.com> wrote:
>>
>>[color=darkred]
>>>$sql_query=" CREATE TABLE '$num' ([/color]
>>
>> Don't put quotes around identifier names. If you must, then in MySQL use
>>either ` or ", but not '. ' is for strings, not identifiers.[/color]
>
> Ok, but I did that I think. I said in my message that I also tried like
> that:
> $sql_query = 'CREATE TABLE $num ('
> . ' `variable1` DATE NOT NULL'
> . ' )';
> In this case I don't use the quotes around the name of the table but
> MySQL still creates a table called $num and doesn't replace the
> variable $num but its value like I wish.
>
> I also tried:
> $sql_query="CRE ATE TABLE $num (variable DATE NOT NULL)";
> but without success.
> I feel that I tried every possible combiantion without success. There
> must be a solution. But what is it?
>[/color]

Look at strings in the PHP manual.

When enclosed in single quotes, variable substitution does NOT take place - so
your table name becomes $num.

When you enclose a string in double quotes, PHP will substitute variables. So
you should have something like:

$sql_query = "CREATE TABLE $num ("
^ ^

Note double quotes instead of single quotes. See
http://www.php.net/manual/en/language.variables.php.

--
=============== ===
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JDS Computer Training Corp.
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