PHP compare array

Question

Is there anyway to compare arrays in php using an inbuilt function, short of doing some sort of loop?

$a1 = array(1,2,3);
$a2 = array(1,2,3);

if (array_are_         


        

Answer 1

If you want to search some array inside a big array of arrays (>10k) then much more quickly is comparing serialized arrays (saved in cache). Example from work with URL:

/**
@return array
*/
function createCache()
{
    $cache = [];
    foreach ($this->listOfUrl() as $url => $args)
    {
        ksort($args);
        $cache['url'][$url] = $args;
        $cache['arr'][crc32(serialize($args))] = $url;
    }
    return $cache;
}

/**
@param array $args
@return string
*/
function searchUrl($args)
{
    ksort($params);
    $crc = crc32(serialize($params));        
    return isset($this->cache['arr'][$crc]) ? $this->cache['arr'][$crc] : NULL;                
} 

/**
@param string $url
@return array
*/
function searchArgs($url)
{
    return isset($this->cache['url'][$url]) ? $this->cache['url'][$url] : NULL;
}