function merge_querystring($url = null,$query = null,$recursive = false){
? // $url = 'https://www.google.com?q=apple&type=keyword';
? // $query = '?q=banana';
? // if there's a URL missing or no query string, return
? if($url == null)
? ? return false;
? if($query == null)
? ? return $url;
? // split the url into it's components
? $url_components = parse_url($url);
? // if we have the query string but no query on the original url
? // just return the URL + query string
? if(empty($url_components['query']))
? ? return $url.'?'.ltrim($query,'?');
? // turn the url's query string into an array
? parse_str($url_components['query'],$original_query_string);
? // turn the query string into an array
? parse_str(parse_url($query,PHP_URL_QUERY),$merged_query_string);
? // merge the query string
? if ($recursive == true) {
? ? $merged_result = array_filter(array_merge_recursive($original_query_string, $merged_query_string));
} else {
? ? $merged_result = array_filter(array_merge($original_query_string, $merged_query_string));
}
// Find the original query string in the URL and replace it with the new one
$new_url = str_replace($url_components['query'], http_build_query($merged_result), $url);
// If the last query string removed then remove ? from url?
if(substr($new_url, -1) == '?') {
? ?return rtrim($new_url,'?');
}
return $new_url;
}
用法
<a href="<?=merge_querystring($url,'?pro=en');?>">EN</a>
<a href="<?=merge_querystring($url,'?pro=as');?>">AS</a>
