Create a Database in MySQL

The first step in this tutorial is the creation of a MySQL database. Since Cloudways provides the custom mysql manager in the platform which contains a database for app. you can create tables by running SQL queries. Create a table `employeeinfo` in database using the following SQL query.

CREATE TABLE employeeinfo(
emp_id VARCHAR(50) UNSIGNED PRIMARY KEY,
firstname VARCHAR(30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
email VARCHAR(50),
reg_date VARCHAR(50)
)

This will create a new table `employeeinfo` in the database. I will use this table to insert data from the CSV file.

Create MySql Connection in PHP

For importing and exporting database in MySql will make a separate file `config.php`. Add the following code and replace the database credentials with yours. You can find your db credentials in Application Access details:

Create MySql Connection in PHP
For importing and exporting database in MySql will make a separate file `config.php`. Add the following code and replace the database credentials with yours. You can find your db credentials in Application Access details:

Import CSV to MySQL in PHP

After the database has been created, I next need an HTML file  that could upload CSV file. For this HTML file, I will use HTML File uploader in a simple bootstrap form.

Create a file and name it `index.php` . This is a simple form for uploading CSV file. This file will also show the results in a simple table on the same page. When the user submits the form,  all records will be saved in the database.

First, I will add Bootstrap CDN to index.php.

Import CSV to MySQL in PHP
After the database has been created, I next need an HTML file  that could upload CSV file. For this HTML file, I will use HTML File uploader in a simple bootstrap form.

Create a file and name it `index.php` . This is a simple form for uploading CSV file. This file will also show the results in a simple table on the same page. When the user submits the form,  all records will be saved in the database.

First, I will add Bootstrap CDN to index.php.

Next, in the `body` tag,  add the following HTML code for the Bootstrap form.


<!DOCTYPE html>
<html lang="en">

<head>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" crossorigin="anonymous">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" crossorigin="anonymous">
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" crossorigin="anonymous"></script>

</head>

<body>
    <div id="wrap">
        <div class="container">
            <div class="row">

                <form class="form-horizontal" action="functions.php" method="post" name="upload_excel" enctype="multipart/form-data">
                    <fieldset>

                        <!-- Form Name -->
                        <legend>Form Name</legend>

                        <!-- File Button -->
                        <div class="form-group">
                            <label class="col-md-4 control-label" for="filebutton">Select File</label>
                            <div class="col-md-4">
                                <input type="file" name="file" id="file" class="input-large">
                            </div>
                        </div>

                        <!-- Button -->
                        <div class="form-group">
                            <label class="col-md-4 control-label" for="singlebutton">Import data</label>
                            <div class="col-md-4">
                                <button type="submit" id="submit" name="Import" class="btn btn-primary button-loading" data-loading-text="Loading...">Import</button>
                            </div>
                        </div>

                    </fieldset>
                </form>

            </div>
            <?php
               get_all_records();
            ?>
        </div>
    </div>
</body>

</html>

You might notice that I have set an action to `functions.php` file. In the next step, I will create this file and add code to it. I have also include a method `get_all_records()` near the end of the file. This method fetches all the records from the database and display the records in the table on the index page.

Next up, I will create `functions.php` file and add the following code in it.

<?php
 if(isset($_POST["Import"])){
    
    $filename=$_FILES["file"]["tmp_name"];    
     if($_FILES["file"]["size"] > 0)
     {
        $file = fopen($filename, "r");
          while (($getData = fgetcsv($file, 10000, ",")) !== FALSE)
           {
             $sql = "INSERT into employeeinfo (emp_id,firstname,lastname,email,reg_date) 
                   values ('".$getData[0]."','".$getData[1]."','".$getData[2]."','".$getData[3]."','".$getData[4]."')";
                   $result = mysqli_query($con, $sql);
        if(!isset($result))
        {
          echo "<script type=\"text/javascript\">
              alert(\"Invalid File:Please Upload CSV File.\");
              window.location = \"index.php\"
              </script>";    
        }
        else {
            echo "<script type=\"text/javascript\">
            alert(\"CSV File has been successfully Imported.\");
            window.location = \"index.php\"
          </script>";
        }
           }
      
           fclose($file);  
     }
  }   
 ?>

When the upload button is clicked, the temporary file name will be stored in memory and using the `while` loop the data is saved in $getData variable. Once the process has been completed, the data is sorted column wise and then finally inserted in the `employeeinfo` table.

Note that `fgetcsv()` parses lines from the open file, checking for CSV fields and `fopen()` opens a file or a URL. This code could be tested by importing a CSV file with test data.

Display the Saved Records

Once the CSV file has been imported, I will display the data through a simple function, `get_all_records()`, initialized in `index.php`. Copy this function to `function.php`

function get_all_records(){
    $con = getdb();
    $Sql = "SELECT * FROM employeeinfo";
    $result = mysqli_query($con, $Sql);  
    if (mysqli_num_rows($result) > 0) {
     echo "<div class='table-responsive'><table id='myTable' class='table table-striped table-bordered'>
             <thead><tr><th>EMP ID</th>
                          <th>First Name</th>
                          <th>Last Name</th>
                          <th>Email</th>
                          <th>Registration Date</th>
                        </tr></thead><tbody>";
     while($row = mysqli_fetch_assoc($result)) {
         echo "<tr><td>" . $row['emp_id']."</td>
                   <td>" . $row['firstname']."</td>
                   <td>" . $row['lastname']."</td>
                   <td>" . $row['email']."</td>
                   <td>" . $row['reg_date']."</td></tr>";        
     }
    
     echo "</tbody></table></div>";
     
} else {
     echo "you have no records";
}
}

In this really simple method, I simply selected all the records and displayed these records on the index page through the method. Whenever the user uploads a CSV file, the records will get saved in the table and then displayed on the index page.

Export MySQL to CSV With PHP

Exporting data from  MySQL database to a CSV file is similarly very easy. To demonstrate this, I will use the index.php that I created earlier.

Add the following code to the file.

<div>
            <form class="form-horizontal" action="functions.php" method="post" name="upload_excel"   
                      enctype="multipart/form-data">
                  <div class="form-group">
                            <div class="col-md-4 col-md-offset-4">
                                <input type="submit" name="Export" class="btn btn-success" value="export to excel"/>
                            </div>
                   </div>                    
            </form>           
 </div>

After adding this HTML markup, the Export button will appear below the table. Now add the following condition in functions.php.

if(isset($_POST["Export"])){
     
      header('Content-Type: text/csv; charset=utf-8');  
      header('Content-Disposition: attachment; filename=data.csv');  
      $output = fopen("php://output", "w");  
      fputcsv($output, array('ID', 'First Name', 'Last Name', 'Email', 'Joining Date'));  
      $query = "SELECT * from employeeinfo ORDER BY emp_id DESC";  
      $result = mysqli_query($con, $query);  
      while($row = mysqli_fetch_assoc($result))  
      {  
           fputcsv($output, $row);  
      }  
      fclose($output);  
 }  

When the `Export` button is clicked, the headers `Content-Type: text/csv` with an attachement `data.csv` is sent.

Since `php://output` is a write-only stream that allows write access to the output buffer mechanism, I selected all data from table in the next line, and passed it to `fputcsv()` method. This method formats a line (passed as a fields array) as CSV and write it (terminated by a newline) to the specified file. Finally, the file with all the desired data is downloaded.

Finally, after integrating all the code, you will see the following final shape of application.

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