RE: [PHP] extract column from multidimentional array
| From: | Boyd, Todd M. | Date: | Mon, 29 Sep 2008 16:08:43 +0000 |
| Subject: | RE: [PHP] extract column from multidimentional array | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-281108@lists.php.net to get a copy of this message | ||
> -----Original Message-----
> From: It flance [mailto:itmaqurfe@yahoo.com]
> Sent: Monday, September 29, 2008 11:04 AM
> To: php-general@lists.php.net
> Subject: [PHP] extract column from multidimentional array
>
> Hi,
>
> below you will find the code for a small script where i'm able to
> extract a row but not a column.
>
> So the question is how can I do that.
>
> Here is the code:
>
> <?php
>
> $arr = array(
> array('00', '01', '02', '03'),
> array('10', '11', '12', '13'),
> array('20', '21', '22', '23'),
> );
>
> $row = $arr[0];
> $col = $arr[][0];
> print_r($row);
> print "\n";
> print_r($col);
> ?>
Being that PHP is row-major (like most programming languages), that
won't work. Loop through the array and build a new one out of just the
1st column from every row (or whatever column you're looking for):
<?php
$colarr = array();
for($a = 0; $a < count($arr); $a++) {
$colarr[$a] = $arr[$a][0]
}
print_r($colarr)
?>
HTH,
Todd Boyd
Web Programmer