PHP customizes dir(), readdir() functions to traverse all files in a directory

PHP customizes dir(), readdir() functions to traverse all files in a directory_PHP tutorial

WBOY

Release： 2016-07-13 10:23:40

Original

856 people have browsed it

PHP custom traverses all files in the directory dir(), readdir() function

Method 1: Use dir() to traverse the directory

The dir() function returns a Directory class instance when successful

PHP dir() syntax format is:

　dir(directory);//directory is the name of the directory where the file name needs to be displayed, and can contain path information

PHP dir() Usage example: List all file names in the upload directory:

代码如下
$dir = @ dir("upload");//打开upload目录；“@”可屏蔽错误信息，因有时候需要显示文件的目录内并没有文件，此时可能会报出错误，用“@”隐藏掉错误 //列举upload目录中的所有文件 while (($file = $dir->read()) !== false) { echo "文件名: " . $file . " "; } $dir->close(); ?>

The output result is:

File name: .

File name: ..

File name: logo.gif

File name: arrow.gif

File name: bg.gif

Example

代码如下

Method 2 Use readir() to traverse the directory

Definition and usage

The readdir() function returns the entry in the directory handle opened by opendir().

If successful, the function returns a file name, otherwise it returns false.

Grammar

readdir(dir_stream)

Example

代码如下

header('content-type:text/html;charset=utf-8');

function listDir($dir)
{
    if(is_dir($dir))
    {
        if($handle = opendir($dir))
        {
            while($file = readdir($handle))
            {
                if($file != '.' && $file != '..')
                {
                    if(is_dir($dir.DIRECTORY_SEPARATOR.$file))
                    {
                        echo '目录名：'.$dir.DIRECTORY_SEPARATOR.''.$file.'
';
                        listDir($dir.DIRECTORY_SEPARATOR.$file);
                    }else{
                        echo '文件名：'.$dir.DIRECTORY_SEPARATOR.$file.'
';
                    }
                }
            }
        }
        closedir($handle);
    }else{
        echo '非有效目录!';
    }
}
listDir('./phpmyadmin');