Wild card array key/value searching and regex replace in keys.

ArrayHelper.php

<?php

class ArrayHelper
{
    /**
     * Provides wild card search for array keys.
     *
     * @param string $search
     * @param array $arr
     * @param bool $keyValue
     * @return array
     */
    public static function keyMatches($search, $arr, $keyValue = true)
    {
        $search = str_replace('\*', '(.*)?', preg_quote($search, '/'));
        $result = preg_grep("/^{$search}$/i", array_keys($arr));
 
        if ($keyValue) {
            $result = array_intersect_key($arr, array_flip($result));
        }
 
        return $result;
    }
 
    /**
     * Provides wild card search for array values.
     *
     * @param string $search
     * @param array $arr
     * @param bool $keyValue
     * @return array
     */
    public static function valueMatches($search, $arr, $keyValue = true)
    {
        $search = str_replace('\*', '(.*)?', preg_quote($search, '/'));
        $result = preg_grep("/^{$search}$/i", array_values($arr));
 
        if ($keyValue) {
            $result = array_intersect($arr, $result);
        }
 
        return $result;
    }
    
    /**
     * Performs a regex replace on array keys.
     *
     * @param string $value
     * @param string $replacement
     * @param $arr
     * @return array
     */
    public static function replaceInKey($value, $replacement, $arr)
    {
        $value = preg_quote($value);
        $result = array_combine(preg_replace("/{$value}/i", $replacement, array_keys($arr)), $arr);
 
        return $result;
    }
}