What are some potential pitfalls of initiating a database action before fully verifying the correctness of the uploaded image in PHP?

Initiating a database action before fully verifying the correctness of the uploaded image in PHP can lead to storing incorrect or potentially harmful data in the database. To prevent this, it is essential to validate the uploaded image file to ensure it meets the necessary criteria before proceeding with any database actions. This can include checking file size, file type, and performing image validation checks to ensure the file is indeed an image. 

// Example code snippet to verify the uploaded image before initiating database action

// Check if file is uploaded
if(isset($_FILES['image'])){
    $file = $_FILES['image'];

    // Check if file is an image
    $check = getimagesize($file["tmp_name"]);
    if($check !== false){
        // Perform additional checks (e.g., file size, file type)

        // If image passes all validation checks, proceed with database action
        // Insert image data into database
    } else {
        // Handle error if file is not an image
        echo "File is not an image.";
    }
}

Keywords

database action uploaded image verification security vulnerability SQL injection

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