PHP implements detailed explanation of traversing files and directories based on glob function

This article mainly introduces relevant information on the detailed explanation of PHP's use of the glob function to traverse files and directories. Friends in need can refer to the following

php glob() function returns the file name or directory that matches the specified pattern. Therefore, we can use the glob function to find files and traverse directories.

Function description: array glob (string $pattern [, int $flags])

Function: Find the file path that matches the pattern and return an array containing the matching files (directories) (Note: The file being checked must be in the server system and cannot be used for remote files)

Parameter description: The first parameter: matching pattern; the second optional parameter:

1. GLOB_MARK - Add a slash to each returned item

2. GLOB_NOSORT - Return the files in their original order of appearance in the directory (not sorted)

3. GLOB_NOCHECK - Returns the pattern used to search if no files match

4. GLOB_NOESCAPE - Backslash unescaped metacharacter

5. GLOB_BRACE - Expand {a,b,c} to match 'a', 'b' or 'c'

6. GLOB_ONLYDIR - Return only directory entries matching pattern

Example 1: Get all files and subdirectories in the specified directory

<?php
   $directories = glob("/tmp/*", GLOB_ONLYDIR);//获取/tmp/目录下的所有目录
   $complete = glob("/tmp/*");//获取/tmp/目录下的所有目录和文件
   $files = array_diff($directories, $complete);//获取/tmp/目录下的所有文件

   echo "Directories in /tmp/<BR>";
   foreach($directories as $val) {
     echo "$val<BR>\n";
   }
   echo "<BR>Files in /tmp/<BR>";
   foreach($files as $val) {
     echo "$val<BR>\n";
   }
?>

Example 2: You Are you still using opendir readdir to traverse files? You are really out!

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

Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study.

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