How to add an array value to the middle of an associative array?

Question

Lets say I have this array:

$array = array(\'a\'=>1,\'z\'=>2,\'d\'=>4);

Later in the script, I want to add the value \'c\'=>3<

Answer 1

A simple approach to this is to iterate through the original array, constructing a new one as you go:

function InsertBeforeKey( $originalArray, $originalKey, $insertKey, $insertValue ) {

    $newArray = array();
    $inserted = false;

    foreach( $originalArray as $key => $value ) {

        if( !$inserted && $key === $originalKey ) {
            $newArray[ $insertKey ] = $insertValue;
            $inserted = true;
        }

        $newArray[ $key ] = $value;

    }

    return $newArray;

}

Then simply call

$array = InsertBeforeKey( $array, 'd', 'c', 3 );