note 85000 modified in function.array-combine by felipe
| From: | felipe@php.net | Date: | Mon, 11 Aug 2008 14:37:13 +0000 |
| Subject: | note 85000 modified in function.array-combine by felipe | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-143368@lists.php.net to get a copy of this message | ||
This may be obvious, but I don't see anything about it on the manual page, so a friendly
warning... The array you are using as keys must have all unique values. If not, array elements get
dropped.
<?php
$arr_notUnique = array('one' , 'one' , 'two');
$arr_b = array('red' , 'green' , 'blue');
$arr_combo = array_combine($arr_notUnique, $arr_b);
?>
Results: Array ( [one] => green [two] => blue )
NOT: Array ( [one] => red [one] => green [two] => blue )
--was--
This may be obvious, but I don't see anything about it on the manual page, so a friendly
warning... The array you are using as keys must have all unique values. If not, array elements get
dropped.
$arr_notUnique = array('one' , 'one' , 'two');
$arr_b = array('red' , 'green' , 'blue');
$arr_combo = array_combine($arr_notUnique, $arr_b);
Results: Array ( [one] => green [two] => blue )
NOT: Array ( [one] => red [one] => green [two] => blue )
http://php.net/manual/en/function.array-combine.php