php 目录中每个文件的循环代码

Loop code for each file in a directory

提问by Chiggins

I have a directory of pictures that I want to loop through and do some file calculations on. It might just be lack of sleep, but how would I use PHP to look in a given directory, and loop through each file using some sort of for loop?

我有一个图片目录，我想遍历它并对其进行一些文件计算。可能只是睡眠不足，但我将如何使用 PHP 查看给定目录，并使用某种 for 循环遍历每个文件？

Thanks!

谢谢！

回答by Emil Vikstr?m

scandir:

扫描目录：

$files = scandir('folder/');
foreach($files as $file) {
  //do your work here
}

or globmay be even better for your needs:

或glob可能更适合您的需求：

$files = glob('folder/*.{jpg,png,gif}', GLOB_BRACE);
foreach($files as $file) {
  //do your work here
}

回答by squirrel

Check out the DirectoryIteratorclass.

查看DirectoryIterator类。

From one of the comments on that page:

从该页面上的评论之一：

// output all files and directories except for '.' and '..'
foreach (new DirectoryIterator('../moodle') as $fileInfo) {
    if($fileInfo->isDot()) continue;
    echo $fileInfo->getFilename() . "<br>\n";
}

The recursive version is RecursiveDirectoryIterator.

递归版本是RecursiveDirectoryIterator。

回答by fvox

Looks for the function glob():

查找函数glob()：

<?php
$files = glob("dir/*.jpg");
foreach($files as $jpg){
    echo $jpg, "\n";
}
?>

回答by Phill Pafford

Try GLOB()

试试GLOB()

$dir = "/etc/php5/*";  

// Open a known directory, and proceed to read its contents  
foreach(glob($dir) as $file)  
{  
    echo "filename: $file : filetype: " . filetype($file) . "<br />";  
}  

回答by Jake

Use the glob function in a foreach loop to do whatever is an option. I also used the file_exists function in the example below to check if the directory exists before going any further.

在 foreach 循环中使用 glob 函数来执行任何选项。我还在下面的示例中使用了 file_exists 函数来检查目录是否存在，然后再继续。

$directory = 'my_directory/';
$extension = '.txt';

if ( file_exists($directory) ) {
   foreach ( glob($directory . '*' . $extension) as $file ) {
      echo $file;
   }
}
else {
   echo 'directory ' . $directory . ' doesn\'t exist!';
}