数组没有在我班级的开关中设置

Question

我正在为我的网站设置一个搜索类,我遇到了一些事情,我不知道为什么它不起作用.

这是班级

<?php

class search
{
    public $location = array();
    public $keywords = array();

    /*
    construct method
    accepts $location and $keywords
    */
    public function __construct($location, $keywords='')
    {
        $this->location = $this->format_location($location);

    }

    /*method format_location
    accepts location value, determines its type... city, state, zip code
    returns array of properly formatted location values
    */
    public function format_location($input)
    {

        // check if location contains a zip code
        $zip_pattern = "/\d{5}/";
        $str = $input;
        preg_match($zip_pattern,$str,$regs);
        // if we do have a zip code lets put it in the location array
        (!empty($reg[0])) ? $this->location['zip'] = $reg[0] : '';

        // if we don't have a zip let's check for one of our pre=formatted locations, this will avoid unessesary regular expressions and database calls
        if(!$this->location['zip']) {

            $swinput = strtolower($input);
            switch($swinput) {
                case "chicago, il":
                echo 'hello';
                    $this->location[] = array('zip'   => 60601,
                                            'city'  => 'Chicago',
                                            'state' => 'IL',
                                            'lat'   => '41.8781136',
                                            'lon'   => '-87.629798',
                                            );
                                            break;
                case "naperville, il":
                    $this->location[] = array('zip'   => 60564,
                                            'city'  => 'Naperville',
                                            'state' => 'IL',
                                            'lat'   => '41.785863',
                                            'lon'   => '-88.147289',
                                            );
                                            break;
            }

        }

    }

}

?>

然后这就是我的称呼方式

require("lib/search/class.search.php");
$lo = new search('chicago, il');
print_r($lo->location);

问题是没有在location属性中设置任何内容.有任何想法吗？

Answer 1

尝试使用

/*
construct method
accepts $location and $keywords
*/
public function __construct($location, $keywords='')
{
    $this->format_location($location);

}

代替

$this->location = $this->format_location($location);

因为format_location不返回任何内容.