Variable Name Cropping

[Anon]

Hi all. I have multiple variables that all start out with $taskName. For example, I have $taskName3, $taskName12, $taskName100, etc. I need a way to set $value equal to the number which follows "$taskName." I.E. $value=3, $value=12, $value=100.

Any advice?

Thanks in advance.

--charles

[Anon]

$taskName12 = "this has some value";
$value = substr("\$taskName12", 9);

now $value will be 12, but this only works if you know the variable name, and your question would only make sense if you didn't know the variable name. Right?

Derek

[khaine]

A solution if you dont know the variable name could be

taking the query string to be $name123&$value567

<?php

$bits=explode("&", $QUERY_STRING);

for ( $temp=0; $temp<count($bits); $temp++ )
{
$varname=eregi_replace("[0-9]", "", $bits[$temp]);
$varval=eregi_replace("[^0-9]", "", $bits[$temp]);
${$varname}=$varval;
echo "Variable name ".$varname." value is ".$varval."<BR>";
}

?>

Mark.

[Anon]

Hi Mark. Thanks for the great solution. That works perfectly!!

--charles

[Anon]

Right. I don't know what the variable name will be EXCEPT that it will start with taskName. It could be $taskname3 or $taskName30001. I need to figure out a way to chop off $taskName and just grab the number.

Any ideas?

--charles

[khaine]

if you use eregi_replace you can remove the non numerics. for example

$string="taskname12345";
$value=eregi_replace("[^0-9]", "", $string);

$value will then have the numerics from the input string.

Mark.

[Anon]

Hi Mark. That would work great except taskname is a variable name and not simply a string. I need to chop off the section "taskName" from the variable.

I.E.:

$taskName25 -- not "taskName25" -- needs to return a value of 25;

any help is always appreciated.

--charles

[khaine]

Ah now I understand what you mean. However how did you end up with a variable name like that. Also why do you need to spilt it??

Mark

[Anon]

It comes from a form on a pervious page. The number portion comes from the primary key in the database table. If you need to see the code, e-mail me ([e-mail]) and I can try to show it to you.

I need to split it to get that number for the code to properly work.

--charles