What are some common pitfalls when trying to group and display files based on their filenames in PHP?

When trying to group and display files based on their filenames in PHP, a common pitfall is not handling file names with special characters or spaces properly. To solve this, it's important to sanitize the file names before grouping them. One way to do this is by using the `urlencode()` function to encode the file names before processing them. 

$files = glob('path/to/files/*');
$groupedFiles = [];

foreach ($files as $file) {
    $filename = basename($file);
    $encodedFilename = urlencode($filename);
    
    // Group files based on their encoded filenames
    $groupedFiles[$encodedFilename][] = $file;
}

// Display grouped files
foreach ($groupedFiles as $filename => $files) {
    echo "Files with filename: " . urldecode($filename) . "<br>";
    foreach ($files as $file) {
        echo $file . "<br>";
    }
}

Keywords

file grouping filename parsing regular expressions directory listing file sorting

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