How to combine the keys and values of an array in PHP

Question

Say I have an array of key/value pairs in PHP:

array( \'foo\' => \'bar\', \'baz\' => \'qux\' );

What\'s the simplest way to transform

Answer 1

A "curious" way to do it =P

// using '::' as a temporary separator, could be anything provided
// it doesn't exist elsewhere in the array
$test = split( '::', urldecode( http_build_query( $test, '', '::' ) ) );

Answer 2

Another option for this problem: On PHP 5.3+ you can use array_map() with a closure (you can do this with PHP prior 5.2, but the code will get quite messy!).

"Oh, but on array_map()you only get the value!".

Yeah, that's right, but we can map more than one array! :)

$arr = array( 'foo' => 'bar', 'baz' => 'qux' );
$result = array_map(function($k, $v){
    return "$k=$v";
}, array_keys($arr), array_values($arr));

Answer 3

chaos' answer is nice and straightfoward. For a more general sense though, you might have missed the array_map() function which is what you alluded to with your map { "$_=$hash{$_}" } keys %hash example.

Answer 4

function parameterize_array($array) {
    $out = array();
    foreach($array as $key => $value)
        $out[] = "$key=$value";
    return $out;
}