How to File Upload in PHP

 To handle file uploads in PHP, you can use the $_FILES superglobal array. This array stores all the information about the uploaded file, including the file name, temporary storage location, and any errors that may have occurred during the file upload.

Here is an example of how you can handle file uploads in PHP:

<?php

// Check if the form has been submitted
if (isset($_POST['submit'])) {
  // Check if a file was uploaded
  if (isset($_FILES['uploaded_file'])) {
    // Get the file details
    $file = $_FILES['uploaded_file'];
    $file_name = $file['name'];
    $file_tmp_name = $file['tmp_name'];
    $file_size = $file['size'];
    $file_error = $file['error'];

    // Check if there were any errors
    if ($file_error === 0) {
      // Check if the file is too large
      if ($file_size <= 1000000) {
        // Generate a new file name to avoid overwriting existing files
        $new_file_name = uniqid('', true) . '.' . pathinfo($file_name, PATHINFO_EXTENSION);

        // Set the upload directory
        $upload_dir = 'uploads/';

        // Try to move the uploaded file to the upload directory
        if (move_uploaded_file($file_tmp_name, $upload_dir . $new_file_name)) {
          // File upload was successful
          echo 'File uploaded successfully';
        } else {
          // File upload failed
          echo 'Failed to upload file';
        }
      } else {
        // File is too large
        echo 'File is too large';
      }
    } else {
      // An error occurred during the file upload
      echo 'Error uploading file';
    }
  }
}

This code first checks if the form has been submitted and then checks if a file was uploaded. It then retrieves the file details from the $_FILES array and checks for any errors that may have occurred during the file upload. If there were no errors, it checks if the file is too large and, if it is not, generates a new file name and tries to move the uploaded file to the specified upload directory. If the file was successfully moved, it outputs a success message; otherwise, it outputs an error message.

It's important to note that this code is just an example and you may need to customize it to fit your specific needs. For example, you may want to add additional checks to validate the file type, size, or other details before allowing the file to be uploaded.