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Adding one character to each array key in PHP

Possible duplicate:
The fastest way to add a prefix to array keys?

I had a quick question about arrays in PHP. I need to add a couple of characters to each key in the array, for example:

name => Brand age => 23 weight => 150

must be converted to:

r_name => Mark r_age => 23 r_weight => 150

Any help would be appreciated, thanks.

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3 answers

Iterate the array, add a new element with the changed key and delete the original element:

foreach ($arr as $key => $val) {
    $arr['r_'.$key] = $val;
    unset($arr[$key]);
}

Since it foreachworks with an internal copy of an array, you are not starting an infinite loop.

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