if .. elseif语句仅适用于elseif

Question

如果您使用一个条件，我有以下PHP脚本工作（if..else工作正常）如果尝试使用if和else if语句（因为两个条件为真）第二个工作而不是第一个

脚本：

$damage_topdir = "/ids_images/drsIN2/";
$damage_topdir1 = "/ids_images/drsIN1/";

$tmp = split(" ", $displayEntryDatetime);
$date = $tmp[0];
$time = $tmp[1];

$tmp = split("/", $date);
$day = $tmp[0];
$month = $tmp[1];
$year = $tmp[2];

$displayEntryDatetime = $year."-".$month."-".$day." ".$time;

$cam_list = array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16);

if ($cam = 'DRHdrsIN1')
{
foreach ($cam_list as $cam) {
  $timestamp = strtotime($displayEntryDatetime);
  $cam_delta =6;
  $timestamp = $timestamp - $cam_delta;
  for ($i = 0; $i < $cam_delta+20; $i++) {
    $cdate = date("d_m_Y* H_i_s", $timestamp);
    $image_name = "/xampp/htdocs" . $damage_topdir. $cam . "/Cam*" . $cam . "*-" .$cdate . "*";

    foreach (glob($image_name) as $filename) {
      if (file_exists($filename)) {
        $fs_image = str_replace("/xampp/htdocs", "", $filename);
         print "<h3>Camera $cam</h3>";          
        print "<a href=\"$fs_image\" target=\"_new\"><img src=\"$fs_image\" height=240 width=320 /></a>\n";
      }
    }
  $timestamp++;
  }
}
}

elseif($cam = 'DRHdrsIN2') ----> this one executes normally...
{
    foreach ($cam_list as $cam) {
  $timestamp = strtotime($displayEntryDatetime);
  $cam_delta = 6;
  $timestamp = $timestamp - $cam_delta;

  for ($i = 0; $i < $cam_delta+20; $i++) {
    $cdate = date("d_m_Y* H_i_s", $timestamp);
    $image_name = "/xampp/htdocs" . $damage_topdir1. $cam . "/Cam*" . $cam . "*-" .$cdate . "*";

    foreach (glob($image_name) as $filename) {
      if (file_exists($filename)) {
        $fs_image = str_replace("/xampp/htdocs", "", $filename);

        print "<h3>Camera $cam</h3>";          
        print "<a href=\"$fs_image\" target=\"_new\"><img src=\"$fs_image\" height=240 width=320 /></a>\n";
      }
    }
  $timestamp++;
  }
}
}
else {

}
?>

Answer 1

您需要使用比较，而不是作业：

if ($cam == 'DRHdrsIN1'){
    ....
elseif($cam == 'DRHdrsIN2'){
    ...