RE: [PHP] Re: Changing variable names in a while loop
Thanks, Torsten. That clears things up quite a bit. I do find the PHP
manual a little heavy going sometimes. Does this mean then that I have to
do this:
$tempcomposer = 'composer' . $countything;
$tempsubheading = 'subheading' . $countything;
$tempmovementno = 'movementno' . $countything;
etc...
as I have about 8 variables to change?
Best wishes,
Ian Gray
-Original Message-
From: Torsten Roehr [mailto:[EMAIL PROTECTED]
Sent: 28 May 2004 12:30
To: [EMAIL PROTECTED]
Subject: [PHP] Re: Changing variable names in a while loop
I.A. Gray [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
Hi all,
Easy question (I hope). My brain seems not be working today, so could
someone help me with this one?
I have a while loop outputting part of an html form which inputs track
information for CDs:
$countything = 1;
while ($countything !=31) {
echo
tr
td$countything./td
tdinput name='fcomposer$countything' type='text'
id='fcomposer$countything' size='20' maxlength='60'//td
tdinput name='fsubheading$countything' type='text'
id='fsubheading$countything' size='20' maxlength='80' //td
tdinput name='fmovementno$countything' type='text'
id='fmovementno$countything' size='3' maxlength='3' //td
tdinput name='ftracktitle$countything' type='text'
id='ftracktitle$countything' size='20' maxlength='60' //td
tdinput name='ftracksubtitle$countything' type='text'
id='ftracksubtitle$countything' size='20' maxlength='80' //td
tdinput name='ftracklength$countything' type='text'
id='ftracklength$countything' size='5' maxlength='8' //td
tdinput name='fextrainfo$countything' type='text'
id='fextrainfo$countything' size='20' maxlength='80' //td
/tr\n;
$countything++;
}
How can I get the value to change in each form? The name and id for each
input field will change from (for example) fcomposer1 to fcomposer30 but
how
do I change the value for each input to show the variables taken from the
database which will be $composer1 to $composer30 ? Obviously if I put in
$composer$countything that will just output the value of $composer
followed
by the value for $countything, but I want it to output the value for
$composer1 if $countything=1 or $composer10 if $countything=10 . Is there
something I can do with variable variables? I couldn't see any examples
in
the PHP manual.
What you want is this:
$temp = 'composer' . $countything;
Then use ${$temp} - it will efectively be $composer1.
Take a look here:
http://de2.php.net/manual/en/language.variables.variable.php
Regards, Torsten Roehr
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Re: [PHP] Re: Changing variable names in a while loop
I.A. Gray [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
Thanks, Torsten. That clears things up quite a bit. I do find the PHP
manual a little heavy going sometimes. Does this mean then that I have to
do this:
$tempcomposer = 'composer' . $countything;
$tempsubheading = 'subheading' . $countything;
$tempmovementno = 'movementno' . $countything;
etc...
as I have about 8 variables to change?
I think so, yes. Just put them into your loop and then use ${$tempcomposer}
and so on to put the value into your input value attribute.
Regards, Torsten
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RE: [PHP] Re: Changing variable names in a while loop
On 28 May 2004 12:30, Torsten Roehr wrote:
I.A. Gray [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
Hi all,
Easy question (I hope). My brain seems not be working today, so
could someone help me with this one?
[...]
How can I get the value to change in each form? The name and id
for each input field will change from (for example) fcomposer1 to
fcomposer30 but
how
do I change the value for each input to show the variables taken
from the database which will be $composer1 to $composer30 ?
Obviously if I put in $composer$countything that will just output
the value of $composer followed by the value for $countything, but
I want it to output the value for $composer1 if $countything=1 or
$composer10 if $countything=10 . Is there something I can do with
variable variables? I couldn't see
any examples
in
the PHP manual.
What you want is this:
$temp = 'composer' . $countything;
Then use ${$temp} - it will efectively be $composer1.
You can also write this as
${'composer'.$countything}
But I'd really, really suggest looking into using arrays for this -- it looks much
more like an array-ish problem than a variable-variable-ish problem to me. Using
arrays, your input fields would look like:
input name='fcomposer[$countything]' type='text' size='20' maxlength='60' /
and then your processing code can easily address $fcomposer[$countything] etc.
Cheers!
Mike
-
Mike Ford, Electronic Information Services Adviser,
Learning Support Services, Learning Information Services,
JG125, James Graham Building, Leeds Metropolitan University,
Headingley Campus, LEEDS, LS6 3QS, United Kingdom
Email: [EMAIL PROTECTED]
Tel: +44 113 283 2600 extn 4730 Fax: +44 113 283 3211
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