递归文件搜索 (PHP)

Recursive File Search (PHP)

提问by Jason

I'm trying to return the files in a specified directory using a recursive search. I successfully achieved this, however I want to add a few lines of code that will allow me to specify certain extensions that I want to be returned.

我正在尝试使用递归搜索返回指定目录中的文件。我成功地实现了这一点，但是我想添加几行代码，允许我指定我想要返回的某些扩展。

For example return only .jpg files in the directory.

例如只返回目录中的 .jpg 文件。

Here's my code,

这是我的代码，

<?php
$it = new RecursiveDirectoryIterator("L:\folder\folder\folder");
foreach(new RecursiveIteratorIterator($it) as $file) {
echo $file . "<br/> \n";
}
?>

please let me know what I can add to the above code to achieve this, thanks

请让我知道我可以在上面的代码中添加什么来实现这一点，谢谢

回答by Jan Han?i?

<?php
$it = new RecursiveDirectoryIterator("L:\folder\folder\folder");
$display = Array ( 'jpeg', 'jpg' );
foreach(new RecursiveIteratorIterator($it) as $file)
{
    if (in_array(strtolower(array_pop(explode('.', $file))), $display))
        echo $file . "<br/> \n";
}
?>

回答by Greg

You should create a filter:

您应该创建一个过滤器：

class JpegOnlyFilter extends RecursiveFilterIterator
{
    public function __construct($iterator)
    {
        parent::__construct($iterator);
    }

    public function accept()
    {
        return $this->current()->isFile() && preg_match("/\.jpe?g$/ui", $this->getFilename());
    }

    public function __toString()
    {
        return $this->current()->getFilename();
    }
}

$it = new RecursiveDirectoryIterator("L:\folder\folder\folder");
$it = new JpegOnlyFilter($it);
$it = new RecursiveIteratorIterator($it);

foreach ($it as $file)
    ...

回答by Ben Everard

Try this, it uses an array of allowed file types and only echos out the file if the file extension exists within the array.

试试这个，它使用一组允许的文件类型，并且只在文件扩展名存在于数组中时才回显文件。

<?php
$it = new RecursiveDirectoryIterator("L:\folder\folder\folder");
$allowed=array("pdf","txt");
foreach(new RecursiveIteratorIterator($it) as $file) {
    if(in_array(substr($file, strrpos($file, '.') + 1),$allowed)) {
        echo $file . "<br/> \n";
    }
}
?>

You may also find that you could pass an array of allowed file types to your RecursiveDirectoryIteratorclass and only return files that match.

您可能还会发现，您可以将一组允许的文件类型传递给您的RecursiveDirectoryIterator类，并且只返回匹配的文件。

回答by emix

Let PHP do the job:

让 PHP 来完成这项工作：

$directory = new RecursiveDirectoryIterator('path/to/directory/');
$iterator  = new RecursiveIteratorIterator($directory);
$regex     = new RegexIterator($iterator, '/\.jpe?g$/i', RecursiveRegexIterator::GET_MATCH);

echo '<pre>';
print_r($regex);

回答by Ahmad ghoneim

Regarding the top voted answer: I created this code which is using fewer functions, only 3, isset(), array_flip(), explode()instead of 4 functions. I tested the top voted answer and it was slower than mine. I suggest giving mine a try:

关于投票最高的答案：我创建了这段代码，它使用较少的函数，只有 3, isset(), array_flip(),explode()而不是 4 个函数。我测试了投票最高的答案，它比我的慢。我建议试试我的：

$it = new RecursiveDirectoryIterator("L:\folder\folder\folder");
foreach(new RecursiveIteratorIterator($it) as $file) {
    $FILE = array_flip(explode('.', $file));
    if (isset($FILE['php']) || isset($FILE['jpg'])) {
        echo  $file. "<br />";
    }
}

回答by user1158023

You might want to check out this page about using glob() for a similar search:

您可能想查看有关使用 glob() 进行类似搜索的页面：

http://www.electrictoolbox.com/php-glob-find-files/

http://www.electrictoolbox.com/php-glob-find-files/