Will there be two more pictures every time?

There is only one picture in the folder. Every time there are two more pictures. The pictures cannot be displayed. But when I look at the two pictures, the src is empty. It is the src of the picture below. Why is this?

<code>$dir = "upload2/"; 
    if (is_dir($dir)){
        if ($dh = opendir($dir)){
        while (($file = readdir($dh))!= false){
            $filePath = $dir.$file;
            echo "<img src='".$filePath."'/>";
        }
        closedir($dh);
        }
    }</code>

Reply content:

There is only one picture in the folder. Every time there are two more pictures. The pictures cannot be displayed. But when I look at the two pictures, the src is empty. It is the src of the picture below. Why is this?

<code>$dir = "upload2/"; 
    if (is_dir($dir)){
        if ($dh = opendir($dir)){
        while (($file = readdir($dh))!= false){
            $filePath = $dir.$file;
            echo "<img src='".$filePath."'/>";
        }
        closedir($dh);
        }
    }</code>

The following code is taken from the official reference as a solution:

<code class="php"><?php
if ($handle = opendir('.')) {
    while (false !== ($entry = readdir($handle))) {
        if ($entry != "." && $entry != "..") {
            echo "$entry\n";
        }
    }
    closedir($handle);
}
?></code>

http://php.net/manual/en/func...

Final form:

<code class="php">$dir = "upload2/"; 
if (is_dir($dir)){
    if ($dh = opendir($dir)){
    while (($file = readdir($dh))!= false){
        if ($file != "." && $file != "..") {
            $filePath = $dir.$file;
            echo "<img src='".$filePath."'/>";
        }
    }
    closedir($dh);
    }
}</code>

． Represents the current directory
. ． Represents the upper-level directory
You can determine whether it is a directory before outputting.