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 this to an array that looks like the following?

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

i.e.

array( 0 => 'foo=bar', 1 => 'baz=qux');

In perl, I'd do something like

map { "$_=$hash{$_}" } keys %hash

Is there something like this in the panoply of array functions in PHP? Nothing I looked at seemed like a convenient solution.

Answer 1

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 2

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