In what situations would it be advisable to use HTML5 File API for directory selection in PHP?

When you need to allow users to select multiple files or folders from their local system and upload them to the server, using the HTML5 File API for directory selection in PHP is advisable. This API allows users to browse their file system and select multiple files or folders, which can then be processed and uploaded to the server using PHP. 

```php
<form id="uploadForm" action="upload.php" method="post" enctype="multipart/form-data">
    <input type="file" id="fileInput" name="files[]" multiple directory webkitdirectory mozdirectory>
    <input type="submit" value="Upload">
</form>
```

In the above code snippet, we have a form with an input field of type "file" that allows users to select multiple files or folders from their local system. The "multiple" attribute allows users to select multiple files or folders, while the "directory webkitdirectory mozdirectory" attributes enable directory selection in browsers that support it. The selected files or folders can then be uploaded to the server using the specified action in the form.

Keywords

HTML5 File API directory selection PHP file handling web development

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