How to Count Files in a Directory with PHP: Opendir/Readdir vs. FilesystemIterator?

Counting Files in a Directory with PHP

When working with directories in PHP, it's often useful to determine the number of files present within. To accomplish this, several methods are available.

Method 1: Using Opendir() and Readdir()

The traditional approach involves using the opendir() and readdir() functions. These functions require explicit directory path manipulation and manual iteration over the files. As seen in the code snippet you provided:

<code class="php">$dir = opendir('uploads/');
$i = 0;
while (false !== ($file = readdir($dir))) {
    if (!in_array($file, array('.', '..') and !is_dir($file)) $i++;
}
echo "There were $i files";</code>

While this method works, it can be cumbersome in certain situations.

Method 2: Using the SPL FilesystemIterator

A more modern alternative is to utilize the SPL FilesystemIterator class. This iterator allows for more convenient and efficient directory scanning. Here's an example:

<code class="php">$fi = new FilesystemIterator(__DIR__, FilesystemIterator::SKIP_DOTS);
printf("There were %d Files", iterator_count($fi));</code>

In this code:

• __DIR__ represents the current directory path.
• FilesystemIterator::SKIP_DOTS instructs the iterator to ignore hidden files (starting with a period).
• iterator_count() returns the total number of files in the directory.

This method simplifies the code and provides a more elegant solution for counting files in a directory.

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