DirectoryIterator::isFile()

(PHP 5,PHP 7)

Determine if current DirectoryIterator item is a regular file

说明

Determines if the currentDirectoryIteratoritem is a regular file.

参数

此函数没有参数。

返回值

ReturnsTRUEif the file exists and is a regular file(not alinkordir),otherwiseFALSE

范例

Example#1DirectoryIterator::isFile()example

This example will list all regular files in the directory containing the script.

以上例程的输出类似于：

apple.jpg
banana.jpg
example.php
pears.jpg

参见

• DirectoryIterator::getType() Determine the type of the current DirectoryIterator item
• DirectoryIterator::isDir() Determine if current DirectoryIterator item is a directory
• DirectoryIterator::isDot() Determine if current DirectoryIterator item is'.'or'..'
• DirectoryIterator::isLink() Determine if current DirectoryIterator item is a symbolic link

Documentation is a bit misleading.
DirectoryIterator->isFile() and other classes (e.g. SplFileInfo->isFile()) return TRUE for symlinks of files. Better use getType() method instead, which returns 'link' for symlinks.
This was reported long time ago - https://bugs.php.net/bug.php?id=72364 , but docs are still not fixed.

to actually sort a directoryiterator you need to subclass the iterator and use a comparator function similar to this one 

shows all .jpg files in the current directory but how does the DirectoryIterator sort the output!?
$dir=new DirectoryIterator("./");
foreach ($dir as $file) {
 if ($dir->isDot()) {continue;}  //removes . and ..
  if (strripos($file,".jpg")==true) {
   echo $file . "
\n";
  }
 }

I put in an example in __autoload, but it is useful here, too...
Yet another class/interface __autoload function. Includes an example usage of the SPL DirectoryIterator class, a settable case-ignore flag, and support for multiple file name patterns to allow easy integration from multiple sources.

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