How can debugging techniques be used to troubleshoot file upload issues in PHP?

To troubleshoot file upload issues in PHP, you can use debugging techniques such as checking file permissions, ensuring the correct file upload limits are set in php.ini, and verifying that the form has the correct enctype attribute set to "multipart/form-data". 

<form action="upload.php" method="post" enctype="multipart/form-data">
    <input type="file" name="file">
    <input type="submit" value="Upload File">
</form>

<?php
if ($_FILES['file']['error'] > 0) {
    echo 'Error uploading file.';
} else {
    move_uploaded_file($_FILES['file']['tmp_name'], 'uploads/' . $_FILES['file']['name']);
    echo 'File uploaded successfully.';
}
?>

Keywords

file upload debugging techniques PHP troubleshooting error types

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