note 109251 added to function.array-combine
| From: | andymeredith at NOSPAM dot gmail dot com | Date: | Fri, 29 Jun 2012 15:17:53 +0000 |
| Subject: | note 109251 added to function.array-combine | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-188971@lists.php.net to get a copy of this message | ||
I was looking for a function to take a linear array, $array, and combine the elements into an
associative array. I used the following function to wrap the behavior of array_combine() to combine
odd and even elements of the original array:
<?php
function combineLinearArray( $arrayToSmush, $evenItemIsKey = true ) {
if ( ( count($arrayToSmush) % 2 ) !== 0 ) {
throw new Exception( "This array cannot be combined because it has an odd number of
values" );
}
$evens = $odds = array();
// Extract even values
for ($i = 0, $c = count($arrayToSmush); $i < $c; $i += 2) {
$evens[] = $arrayToSmush[$i];
}
// Extract odd values
for ($i = 1, $c = count($arrayToSmush); $i < $c; $i += 2) {
$odds[] = $arrayToSmush[$i];
}
// Combine them and return
return ( $evenItemIsKey ) ? array_combine($evens, $odds) : array_combine($odds, $evens) ;
}
?>
Here is an example of usage:
<?php
$array = array( 'one', 1, 'two', 2, 'three', 3, 'four', 4 );
print_r( combineLinearArray($array) );
/*
Prints:
Array
(
[one] => 1
[two] => 2
[three] => 3
[four] => 4
)
*/
?>
----
Server IP: 69.147.83.197
Probable Submitter: 173.227.191.21
----
Manual Page -- http://www.php.net/manual/en/function.array-combine.php
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