PhP Search Directory By File Extension

问题

I have a script and a function in it gets every file in that folder. How can I edit this code to make it so it only gets .png files?

public function GetPreviews($category)
    {
        $directories = glob("assets/preview/$category/*");
        $directory = array();
        foreach($directories as $directories)
        {
            $directory[] = str_replace("assets/preview/$category/", "", $directories);   
        }
        return $directory;      
    }

回答1:

add .png to glob("assets/preview/$category/*.png");

public function GetPreviews($category)
    {
        $directories = glob("assets/preview/$category/*.png");
        $directory = array();
        foreach($directories as $directories)
        {
            $directory[] = str_replace("assets/preview/$category/", "", $directories);   
        }
        return $directory;      
    }

回答2:

Since you are using glob() - just add .png after the last *

Like so:

public function GetPngs($category)
    {
        $directories = glob("assets/preview/$category/*.png");
        $directory = array();
        foreach($directories as $directories)
        {
            $directory[] = str_replace("assets/preview/$category/", "", $directories);   
        }
        return $directory;      
    }

回答3:

You are missing '.png' in your code just change

$directories = glob("assets/preview/$category/*");

to

$directories = glob("assets/preview/$category/*.png");

来源：https://stackoverflow.com/questions/27063706/php-search-directory-by-file-extension