$$wname

w变量名为变量，减少重复代码。

 1 <?php
 2 function w_w($w_arr, $link)
 3 {
 4     $wres = true;
 5     foreach ($w_arr AS $w) {
 6         $wname = ‘w‘ . $w;
 7         js_pure_alert($wname);
 8         if (!empty($$wname)) {
 9             $sql = ‘UPDATE asin_email SET email_type=‘ . $w . ‘ WHERE id IN(‘ . substr($$wname, 0, strlen($$wname) - 1) . ‘)‘;
10             if (!mysqli_query($link, $sql)) $wres = false;
11         }
12     }
13     return $wres;
14 }