What are the best practices for editing and publishing documents using PHP on a web server?

When editing and publishing documents using PHP on a web server, it is important to ensure that the code is secure and follows best practices to prevent vulnerabilities. One way to achieve this is by sanitizing user input to prevent SQL injection and cross-site scripting attacks. Additionally, using proper file permissions and validation checks can help maintain the integrity of the documents being edited and published. 

// Example of sanitizing user input before using it in a SQL query
$user_input = $_POST['user_input'];
$clean_input = mysqli_real_escape_string($connection, $user_input);

// Example of validating file type before uploading
if ($_FILES['file']['type'] == 'application/pdf') {
    move_uploaded_file($_FILES['file']['tmp_name'], 'uploads/' . $_FILES['file']['name']);
}

Keywords

file handling PHP functions web server document editing publishing

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