Reading commaseparated string into array

[Martin]

Hi, I need some help on reading commaseparated strings into arrays as numbers.

When I use

$data = "12.4,11.3,13.2 ";
$myarray = explode(',',$da ta);

I get strings, not numbers:.

$myarray:array =
0 = "12.4"
1 = "11.3"
2 = "13.2"

where I need

$myarray:array =
0 = 12.4
1 = 11.3
2 = 13.2

What to do?

[Ewoud Dronkert]

Re: Reading commaseparated string into array

On Mon, 18 Apr 2005 10:58:54 -0400, Martin < > wrote:[color=blue]
> $data = "12.4,11.3,13.2 ";
> $myarray = explode(',',$da ta);
> I get strings, not numbers:.[/color]

It's probably good enough; whenever you use variables in a numerical
context, they are treated as numbers, even if they are numbers in a
string. If you *have* to make them numbers first, try:

function makefloat( $a )
{
return (float)$a;
}
$numdata = array_map( 'makefloat', $strdata ); // PHP >= 4.0.6


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[Good Man]

Re: Reading commaseparated string into array

Ewoud Dronkert <firstname@last name.net.invali d> wrote in
news:t3k761dj2e kpm6gdhmjk1hq8o tc178k72h@4ax.c om:
[color=blue]
> On Mon, 18 Apr 2005 10:58:54 -0400, Martin < > wrote:[color=green]
>> $data = "12.4,11.3,13.2 ";
>> $myarray = explode(',',$da ta);
>> I get strings, not numbers:.[/color]
>
> It's probably good enough; whenever you use variables in a numerical
> context, they are treated as numbers, even if they are numbers in a
> string.[/color]

You know, I think this *used* to be true, but somewhere mid-PHP4 upgrades,
a lot of my scripts (actually, ALL 'numbers' that were coming via explode
()) stopped working and I had to specifically float() the array contents.

[Martin]

Re: Reading commaseparated string into array

On Mon, 18 Apr 2005 17:26:11 +0200, Ewoud Dronkert <firstname@last name.net.invali d> wrote:
[color=blue]
>On Mon, 18 Apr 2005 10:58:54 -0400, Martin < > wrote:[color=green]
>> $data = "12.4,11.3,13.2 ";
>> $myarray = explode(',',$da ta);
>> I get strings, not numbers:.[/color]
>
>It's probably good enough; whenever you use variables in a numerical
>context, they are treated as numbers, even if they are numbers in a
>string. If you *have* to make them numbers first, try:[/color]

Some of the classes I use will not work with arrays of strings, so thanks.[color=blue]
>
>function makefloat( $a )
>{
> return (float)$a;
>}
>$numdata = array_map( 'makefloat', $strdata ); // PHP >= 4.0.6[/color]

[Ewoud Dronkert]

Re: Reading commaseparated string into array

On Mon, 18 Apr 2005 10:57:59 -0500, Good Man wrote:[color=blue][color=green]
>> whenever you use variables in a numerical context, they are treated as
>> numbers, even if they are numbers in a string.[/color]
>
> You know, I think this *used* to be true, but somewhere mid-PHP4 upgrades,
> a lot of my scripts (actually, ALL 'numbers' that were coming via explode
> ()) stopped working and I had to specifically float() the array contents.[/color]

Really? This works fine in php 4.3.9 and php5:

foreach ( explode( ',', '1,2.7,-3.14' ) as $n ) echo ($n + 1)."\n";

gives

2
3.7
-2.14


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[Good Man]

Re: Reading commaseparated string into array

Ewoud Dronkert <firstname@last name.net.invali d> wrote in
news:crq7611bil 5h58d5r38sm2nlu on500s8sc@4ax.c om:

[color=blue][color=green]
>> You know, I think this *used* to be true, but somewhere mid-PHP4
>> upgrades, a lot of my scripts (actually, ALL 'numbers' that were
>> coming via explode ()) stopped working and I had to specifically
>> float() the array contents.[/color]
>
> Really? This works fine in php 4.3.9 and php5:
>
> foreach ( explode( ',', '1,2.7,-3.14' ) as $n ) echo ($n + 1)."\n";
>
> gives
>
> 2
> 3.7
> -2.14[/color]

interesting.... but yeah, really, scripts that were working fine for over a
year just stopped working correctly (php upgrade) and i had to recode a few
pages and float() each exploded number before multiplying against another
variable (also a number).... i was confused as could be, i guess i still
am!