referance a variable from a string and a variable 1

[Sylv4n]

What I want to do is loop through a variang number of controls that all have the same prefix "select" but with a incrementing number on the end. and if it is there it will be = to "true" here is what I have so far:

for ($i = 0; $i < $howmanyfields; $i++) {
if ( &quot;select&quot; . $i == &quot;true&quot; ) {
print ( &quot;Number $i is avalable&quot;
}
}

but it wont recogine the (&quot;select&quot; . $i) as ($select1) I haev tried to put a \$ @ the front but still the same problem, any ideas?

 

[hos2]

for ($i = 0; $i < $howmanyfields; $i++) {
if ( &quot;select&quot; . $i == &quot;true&quot; ) {
print ( &quot;Number $i is avalable $i&quot;
}
else{
print ( &quot;Number $i is NOT available $i&quot;
}

}

 

[Sylv4n]

same problem,
Waht I need to be able to di is type

print ( &quot;\$select&quot; . $i . &quot;<br />&quot; );

or something like that and it will print

true

rather than waht it is soing at the moment which is:

$select0

 

[Sylv4n]

Just for clarification, I have the following code:

for ($i = 0; $i < $howmanyfields; $i++) {
if ( &quot;select&quot; . $i == &quot;true&quot; ) {
print ( &quot;Number $i is avalable $i<br />&quot;
} else {
print ( &quot;Number $i is NOT available $i<br />&quot;
}
}

and the following URL (without initial bit)
URL/SelectStatement2.php?select1=true&select2=true&select4=true

and I am getting the following output:

Number 0 is NOT available 0
Number 1 is NOT available 1
Number 2 is NOT available 2
Number 3 is NOT available 3
Number 4 is NOT available 4

When clearly 1,2 & 4 are selected

 

[halamazoo]

Try this out:

<SCRIPT language=&quot;php&quot;>
for ($i = 0; $i < $howmanyfields; $i++)
{
$select = &quot;select&quot;.$i;
if ( $$select == true )
{
print ( &quot;Number $i is avalable $i<br />&quot;
}
else
{
print ( &quot;Number $i is NOT available $i<br />&quot;
}
}
</SCRIPT>

I've tested it, and it works beautifully. Note the &quot;$$&quot; in the if-clause... very key.

Mark

 

[sleipnir214]

If these are HTML form inputs, why not just loop through $_GET as appropriate, building the array key name as needed?

<?php
for ($i = 0; $i < $howmanyfields; $i++) {
  if ( $_GET['select' . $i] == &quot;true&quot; ) {
    print ( &quot;Number $i is avalable $i<br />&quot;);
  } else {
    print ( &quot;Number $i is NOT available $i<br />&quot;);
  }
}

Want the best answers? Ask the best questions:

http://www.catb.org/~esr/faqs/smart-questions.html

TANSTAAFL!!

 

[Sylv4n]

BRILLIANT,

works fine, thank you all very much
but I'm not sure why this works.

$select = &quot;select&quot;.$i;
if ( $$select == true )

are you saying the variable $select = (variable name) &quot;select0&quot;
but why the $$select?

 

[sleipnir214]

Take a look at the PHP online manual section on variable variables:

http://www.php.net/manual/en/language.variables.variable.php

However, I and the PHP manual both recommend that you reference $_GET rather than depend on PHP's registration of the variables.

http://www.php.net/manual/en/security.registerglobals.php

Want the best answers? Ask the best questions:

http://www.catb.org/~esr/faqs/smart-questions.html

TANSTAAFL!!

 

[sleipnir214]

Oops. Hit &quot;submit&quot; too soon.

In addition to the reasons given in the PHP manual page on register_globals, referencing $_GET and $_POST also produces better-documented code. Six months from now you may not remember how the value got into $foo, but $_POST['foo'] is self-evident.

Want the best answers? Ask the best questions:

http://www.catb.org/~esr/faqs/smart-questions.html

TANSTAAFL!!

 

[Sylv4n]

interesting,
I have changed my code accordingly, thanks sleipnir214