PHP DirectoryIterator isDir()用法及代碼示例

DirectoryIterator::isDir()函數是PHP中的內置函數，用於檢查當前DirectoryIterator項是否為目錄。

用法:

bool DirectoryIterator::isDir( void )

參數：該函數不接受任何參數。

返回值：如果目錄存在，則此函數返回TRUE，否則返回FALSE。

以下示例程序旨在說明PHP中的DirectoryIterator::isDir()函數：

示例1:

<?php 
  
// Create a directory Iterator 
$directory = new DirectoryIterator(dirname(__FILE__)); 
  
// Loop runs while directory is valid 
while ($directory->valid()) { 
  
    // Check for directory element 
    if ($directory->isDir()) { 
        $file = $directory->current(); 
  
        // Display the filename and its size 
        echo $file->getFilename() . " | Size: "
                . $directory->getSize() . "<br>"; 
    } 
  
    // Move to the next element 
    $directory->next(); 
} 
  
?>

輸出：

. | Size: 4096
.. | Size: 12288
dashboard | Size: 4096
img | Size: 0
webalizer | Size: 0
xampp | Size: 0

示例2:

<?php 
  
// Create a directory Iterator 
$directory = new DirectoryIterator(dirname(__FILE__)); 
  
// Loop runs while directory is valid 
while ($directory->valid()) { 
  
    // Check for directory element 
    if ($directory->isDir()) { 
        $file = $directory->current(); 
  
        // Display file name and last modified time 
        echo $file->getFilename() . " | MTime: "
                . $directory->getMTime() . "<br>"; 
    } 
  
    // Move to the next element 
    $directory->next(); 
} 
?>

輸出：

. | MTime: 1574654324
.. | MTime: 1574540515
dashboard | MTime: 1574350724
img | MTime: 1574350724
webalizer | MTime: 1574350718
xampp | MTime: 1574350724

注意：此函數的輸出取決於服務器文件夾的內容。

參考： https://www.php.net/manual/en/directoryiterator.isdir.php

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注：本文由純淨天空篩選整理自jit_t大神的英文原創作品 PHP | DirectoryIterator isDir() Function。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。