What are the best practices for handling file uploads in PHP to avoid size limitations and ensure successful transmission of data?

When handling file uploads in PHP, it is important to consider the limitations set by the server configuration, such as upload_max_filesize and post_max_size. To avoid size limitations and ensure successful transmission of data, you can increase these limits in the php.ini file or override them in the PHP script using ini_set(). Additionally, you can use the move_uploaded_file() function to securely move the uploaded file to a designated directory. 

<?php
// Set maximum file size limits
ini_set('upload_max_filesize', '20M');
ini_set('post_max_size', '25M');

// Handle file upload
if ($_FILES['file']['error'] === UPLOAD_ERR_OK) {
    $uploadDir = 'uploads/';
    $uploadFile = $uploadDir . basename($_FILES['file']['name']);
    
    if (move_uploaded_file($_FILES['file']['tmp_name'], $uploadFile)) {
        echo 'File uploaded successfully.';
    } else {
        echo 'Failed to upload file.';
    }
} else {
    echo 'Error uploading file.';
}
?>

Keywords

file uploads PHP size limitations data transmission error handling

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