http_build_query但替换＆with; 用PHP？

http_build_query($array) will convert array to the format of a=1&b=2,

But how to make it convert to the format of a=1;b=2?

Is there a native function there?

The third parameter to http_build_query is the separator; call it with http_build_query($array, "", ";") to get what you're after.

http_build_query() can do that as of PHP 5.1.2. For example:

$data = array('foo'=>'bar',
              'baz'=>'boom',
              'cow'=>'milk',
              'php'=>'hypertext processor');

echo http_build_query($data, '', ';');

As you can see the third parameter is the arg_separator and can be any string you like.

Output from the above example would be:

foo=bar;baz=boom;cow=milk;php=hypertext+processor