Михаил Ливач

jQuery(function () {
        let $ = jQuery;
        $("a", $(".goroda")).each( function () {
            let $this = $(this);
            let path = window.location.pathname;
            $this.attr("href", $this.attr("href") + path.substr(1) );
        } );
    })

class A {

    /**
     * A constructor.
     * @throws Exception
     */
    public function __construct()
    {
        // $cnt откуда-то берется...
        $cnt = 0;
        if ( $cnt < 1 ) {
            throw new Exception("нулевое количество");
        }
    }
}

class B {

    private $errors = array();

    public function run()
    {
        try {
            $a = new A();
        } catch (Exception $e) {
            $this->errors[] = $e->getMessage();
        }

        return array("errors"=>$this->errors);
    }
}

class A {
    /**
     * A constructor.
     */
    public function __construct()
    {
    }

    /**
     * @throws Exception
     */
    public function init()
    {
        // $cnt откуда-то берется...
        $cnt = 0;
        if ( $cnt < 1 ) {
            throw new Exception("нулевое количество");
        }
    }
}

class B {

    private $errors = array();

    public function run()
    {
        try {
            $a = new A();
            $a->init();
        } catch (Exception $e) {
            $this->errors[] = $e->getMessage();
        }

        return array("errors"=>$this->errors);
    }
}

$res = mysql_query("SELECT model FROM tech WHERE tech_cat='{$cat_id}'");
$models = array();
while ( $row = mysql_fetch_assoc($res) ) {
    $models[] = $row['model'];
}
print_r($models);
print_r(array_count_values($models));