[英]Where does "." (dot) come from when using PHP ´scandir´
I'm a bit confused.我有点困惑。
I'm building a PHP function to loop out images in a specified dir.我正在构建一个 PHP 函数来循环出指定目录中的图像。
PHP PHP
$dir = "bilder/".$objekt[0]['objekt_nr']."/thumbnail/";
$thumbnails = scandir($dir);
print_r($thumbnails);
foreach ($thumbnails as $value) {
echo "<img src='".$dir.$value. "'>";
}
array大批
(
[0] => .
[1] => ..
[2] => bjornc.jpg
[3] => test_bild3.jpg
)
HTML HTML
<img src='bilder/22159/thumbnail/.'>
<img src='bilder/22159/thumbnail/..'>
<img src='bilder/22159/thumbnail/bjornc.jpg'>
<img src='bilder/22159/thumbnail/test_bild3.jpg'>
How can i get rid of theese dots?我怎样才能摆脱这些点?
I guess it´s the directorie dots..我想这是目录点..
UPDATE更新
The most easy way was found in php.net manual在 php.net 手册中找到了最简单的方法
$thumbnails = array_diff(scandir($dir), array('..', '.'));
The dot directory is the current directory.点目录是当前目录。 Dot-dot is the parent directory.
点-点是父目录。
If you want to create a list of files in a directory you should really skip those two, or really any directory starting with a leading dot (on POSIX systems like Linux and OSX those are supposed to be hidden directories).如果您想在目录中创建文件列表,您应该真正跳过这两个,或者任何以前导点开头的目录(在 POSIX 系统上,如 Linux 和 OSX,这些应该是隐藏目录)。
You can do that by simply check if the first character in the file name is a dot, and if it is just skip it (ie you continue
the loop).您可以通过简单地检查文件名中的第一个字符是否为点来实现,如果只是跳过它(即
continue
循环)。
You can skip it by using in_array
as您可以使用
in_array
作为跳过它
foreach ($thumbnails as $value) {
if (!in_array($value, array(".", ".."))) {
echo "<img src='" . $dir . $value . "'>";
}
}
they are directory and parent directory, they can be removed with following code:它们是目录和父目录,可以使用以下代码删除它们:
<?php
$dir = "downloads/";
if (is_dir($dir)){
if ($dir_handler = opendir($dir)){
while (($file = readdir($dir_handler)) !== false){
if ($file!="."&&$file!="..") {
//your code
}
}
closedir($dir_handler);
}
}
?>
You can also use this你也可以用这个
foreach ($thumbnails as $value) {
if ( $value !='.' && $value !='..')
{
echo "<img src='".$dir.$value. "'>";
}
}
If you are looking for a specific file type, such as images, you are better off using glob
.如果您正在寻找特定的文件类型,例如图像,最好使用
glob
。
It allows you to pass a pattern of extensions.它允许您传递扩展模式。
This way you can be sure you fetch only the files you are looking for.通过这种方式,您可以确保只获取您要查找的文件。
Example for multiple file types, .jpg
and .png
多种文件类型的示例,
.jpg
和.png
$dir = "bilder/".$objekt[0]['objekt_nr']."/thumbnail/";
$files = glob("*.{jpg,png}", GLOB_BRACE);
print_r($files);
GLOB_BRACE - Expands {a,b,c} to match 'a', 'b', or 'c'
GLOB_BRACE - 扩展 {a,b,c} 以匹配 'a'、'b' 或 'c'
Example for a single file type, .jpg
单个文件类型的示例,
.jpg
$dir = "bilder/".$objekt[0]['objekt_nr']."/thumbnail/";
$files = glob("*.jpg");
print_r($files);
@joachim Pileborg answer is correct, By the way you can also use glob() @joachim Pileborg 答案是正确的,顺便说一句,您也可以使用 glob()
$thumbnails = glob("$dir/*.jpg");
foreach ($thumbnails as $value) {
echo "<img src='$value'/>";
}
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