What are the potential pitfalls of manually assigning unique identifiers for images uploaded via a form in PHP?

Potential pitfalls of manually assigning unique identifiers for images uploaded via a form in PHP include the risk of collisions if not properly generated, potential security vulnerabilities if the identifiers are predictable, and the possibility of inconsistencies if the identifiers are not unique. To solve this issue, it is recommended to use PHP's built-in function `uniqid()` to generate unique identifiers for the uploaded images. 

// Generate a unique identifier for the uploaded image
$unique_id = uniqid();

// Use the unique identifier for the image file name
$image_name = $unique_id . '_' . $_FILES['image']['name'];

// Move the uploaded image to the desired directory with the unique identifier as the file name
move_uploaded_file($_FILES['image']['tmp_name'], 'uploads/' . $image_name);

Keywords

file upload unique identifier security vulnerability SQL injection image manipulation

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