Question

我正在尝试使用php显示特定文件夹中的图像文件并尝试这样：

$dirname = "users/".trim($_GET['nome']);
    $files = array();
    if (is_dir($dirname)) {} else {mkdir($dirname, 0777);}
    $dir = opendir($dirname);
        //while ($file = readdir($dir)) {
        while ($file = readdir($dir)) {
            //if ($file == '.' || $file == '..') {
            if($file == '.' || $file == '..' || strpos($file,'jpg') == false){
                continue;
            }
            $files[] = array('file' => 'http://www.lavorirapidi.it/public/users/'.trim($_GET['nome']).'/'.$file, 'name' => $file);
        }
    echo json_encode($files);

但我注意到我只查看jpg的小案例！如果我删除

|| strpos($file,'jpg') == false

我也查看子目录！我的问题是：是否可能仅查看jpg，png，gif不区分大小写？

Answer 1

将glob与GLOB_BRACE标志一起使用以匹配多个扩展名和括号，使其不区分大小写

    $dirname = "users/".trim($_GET['nome']);
    $files = array();
    if (is_dir($dirname)) {} else {mkdir($dirname, 0777);}
    $fileNames = glob("*.{[jJ][pP][gG],[pP][nN][gG],[gG][iI][fF]}", GLOB_BRACE);
    foreach($fileNames as $fileName){
         $files[] = array('file' => 'http://www.lavorirapidi.it/public/users/'.trim($_GET['nome']).'/'.$fileName, 'name' => $fileName);
    }
    echo json_encode($files);

Answer 2

已经有内置功能。 stripos()

if (stripos($file, '.jpg') !== false || stripos($file, '.png') !== false) {
    //$file should be an image
}

Answer 3

只需使用glob()，一切都很简单：

<?php

    $dirname = "users/" . trim($_GET['nome']);
    if (!is_dir($dirname))
        mkdir($dirname, 0777);

    $files = glob($dirname . "/*.*");
    //filter all non images out of the files array
    $files = array_filter($files, function($v){
        return in_array(strtolower(pathinfo($v)["extension"]), ["jpg", "png", "gif"]);
    });
    //modify array to expected output
    $files = array_map(function($v){
        return ["file" => "http://www.lavorirapidi.it/public/users/" . trim($_GET['nome']) . "/" . $v, "name" => $v];
    }, $files);

    echo json_encode($files);

?>

示例数组：

Array
(
    [0] => Array
        (
            [file] => http://www.lavorirapidi.it/public/users/test/test/1.Jpg
            [name] => test/1.Jpg
        )

    [1] => Array
        (
            [file] => http://www.lavorirapidi.it/public/users/test/test/2.JPG
            [name] => test/2.JPG
        )

    [2] => Array
        (
            [file] => http://www.lavorirapidi.it/public/users/test/test/3.pNg
            [name] => test/3.pNg
        )

    [3] => Array
        (
            [file] => http://www.lavorirapidi.it/public/users/test/test/4.jpG
            [name] => test/4.jpG
        )

)

使用PHP仅在特定文件夹中显示图像

3 个答案: