PHP数组 - 如何在里面使用变量？

i´ve got some Problems with the following code

function search_query_filter2($query) {
    if( $query->is_search() && $query->is_main_query() ) {

        $test1 = 59602;
        $test2 = 33142;

        $plza = array($test1, $test2);

        $query->set( 'meta_key', 'colabs_zipcode' );
        $query->set( 'meta_value', $plza);
        }
}

First of all, this Code works in this way fine, now the Problem:

As you see i set two variables in the following way:

        $test1 = 59602;
        $test2 = 33142;

to get them work in array() like:

        $plza = array($test1, $test2);

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BUT it should look like this to make it work for my requirements (String as Array variable)

        $test = '59602,33140';

and

        $plza = array($test);

I cant get it working =/

Is this what you are looking for?

$test = '59602,33140';
$plza = explode(",", $test);

See http://php.net/manual/en/function.explode.php

Take a look at the PHP explode() function: http://php.net/manual/en/function.explode.php

Returns an array of strings, each of which is a substring of string formed by splitting it on boundaries formed by the string delimiter.

Your code would be similar to this:

$test = '59602,33140';
$plza = explode(',', $test);