Import CSV to Mysql using PHP File Read

by Vincy. Last modified on March 27th, 2023.

Are you searching for data-migration code from a CSV to MySQL database? Here you go!

There are many ways to implement CSV import. We have seen one or two examples of it previously. Even, this article gives two examples on CSV to MySQL import.

About two examples:

  1. A quick example to simply importing data from an existing CSV file.
  2. An interactive featured code to choose CSV via form and process CSV import.

This simple code imports CSV to MySQL database using PHP. All it needs is a source CSV file and a target database. See the prerequisites to experiment with this example in your environment.

Quick Example

CSV to MySQL PHP import

<?php
$mysqli = new mysqli("localhost", "root", "", "csv-to-mysql");

$csvFilePath = "import-template.csv";
$file = fopen($csvFilePath, "r");
while (($row = fgetcsv($file)) !== FALSE) {
    $stmt = $mysqli->prepare("INSERT INTO tbl_users (userName, firstName, lastName) VALUES (?, ?, ?)");
    $stmt->bind_param("sss", $row[1], $row[2], $row[3]);
    $stmt->execute();
}
?>

Prerequisites:

The below blocks contain the prerequisites of running the CSV to MySQL quick example.

It displays source data in CSV format and a database structure to have the tbl_users table.

(1) Source CSV file

1,kevin_tom,Kevin,Thomas
2,vincy,Vincy,Jone
3,tim_lee,Tim,Lee
4,jane,Jane,Ferro

(2) Target MySQL database

CREATE TABLE `tbl_users` (
  `id` int(11) NOT NULL,
  `userName` varchar(255) NOT NULL,
  `firstName` varchar(255) NOT NULL,
  `lastName` varchar(255) NOT NULL,
  `create_at` timestamp NOT NULL DEFAULT current_timestamp() ON UPDATE current_timestamp()
);
ALTER TABLE `tbl_users`
  ADD PRIMARY KEY (`id`);

ALTER TABLE `tbl_users`
  MODIFY `id` int(11) NOT NULL AUTO_INCREMENT;

Steps to implement importing CSV to MySQL

  1. Create a target database to store CSV records.
  2. Design import form and handle validation.
  3. Develop PHP file reading endpoint to import CSV to MySQL database.

Example 2: Full-fledge and featured CSV to MySQL import

Let us see this elaborate example by following the above three steps. It shows the code created to achieve each step to implement the CSV to MySQL import.

This example uses the same database as its target to import the CSV data.

HTML form to choose CSV source

This HTML form allows users to choose the CSV source file. It accepts CSV and Excel files to read data to import.

index.php (Import Form)

<form action="" method="post" name="frmCSVImport" id="frmCSVImport"
	enctype="multipart/form-data" onsubmit="return validateFile()">
	<div Class="input-row">
		<label>Choose your file. <a href="./import-template.csv" download>Download
				template</a></label> <input type="file" name="file" id="file"
			class="file" accept=".csv,.xls,.xlsx">
		<div class="import">
			<button type="submit" id="submit" name="import" class="btn-submit">Import
				CSV and Save Data</button>
		</div>
	</div>
</form>

CSS and JavaScript validation script

The above form calls the validation script on submit. The validation script is in JavaScript to check if the file input is not empty. It is in the head section of the same index.php page.

index.php (Validation)

<head>
<link href="style.css" rel="stylesheet" type="text/css" />
<script type="text/javascript">
function validateFile() {
    var csvInputFile = document.forms["frmCSVImport"]["file"].value;
    if (csvInputFile == "") {
      error = "No source found to import. Please choose a CSV file. ";
      $("#response").html(error).addClass("error");;
      return false;
    }
    return true;
  }
</script>
</head>

and the styles are,

style.css

body {
	font-family: Arial;
	width: 550px;
	font-size: 0.9em;
	margin: 60px auto;
}

.heading {
	text-align: center;
}

.form-container {
	border: #e0dfdf 1px solid;
	padding: 30px 30px 10px 30px;
	border-radius: 15px;
	margin: 10px auto;
	width: 350px;
	text-align: center;
}

.input-row {
	margin-top: 0px;
	margin-bottom: 20px;
}

.btn-submit {
	background: #efefef;
	border: #d3d3d3 1px solid;
	width: 100%;
	border-radius: 20px;
	cursor: pointer;
	padding: 12px;
}

.btn-submit:hover {
	background: #d9d8d8;
	border: #c3c1c1 1px solid;
}

.outer-container table {
	border-collapse: collapse;
	width: 100%;
}

.outer-container th {
	border-top: 2px solid #dddddd;
	background: #f9f9f9;
	padding: 8px;
	text-align: left;
	font-weight: normal;
}

.outer-container td {
	border-top: 1px solid #dddddd;
	padding: 8px;
	text-align: left;
}

.outer-container label {
	margin-bottom: 5px;
	display: inline-block;
}

#response {
	padding: 10px;
	border-radius: 15px;
}

.success {
	background: #c7efd9;
	border: #bbe2cd 1px solid;
}

.error {
	background: #fbcfcf;
	border: #f3c6c7 1px solid;
}

.file {
	border: 1px solid #cfcdcd;
	padding: 10px;
	border-radius: 20px;
	color: #171919;
	width: 100%;
	margin-bottom: 20px;
}

CSV to MySQL import in PHP

On submitting the form, the PHP code triggers the CSV read handler. The readUserRecords() function of the UserModel class is doing this CSV parsing.

index.php (Triggering CSV read in PHP)

<?php
namespace Phppot;

use Phppot\DataSource;
require_once __DIR__ . '/lib/UserModel.php';
$userModel = new UserModel();
if (isset($_POST["import"])) {
    $response = $userModel->readUserRecords();
}
?>

and the UserModel class contains the functions to do the following.

This model class connects the database in its constructor and set the connection object.

UserModel.php

<?php
namespace Phppot;

use Phppot\DataSource;

class UserModel
{

    private $conn;

    function __construct()
    {
        require_once 'DataSource.php';
        $this->conn = new DataSource();
    }

    function getAllUser()
    {
        $sqlSelect = "SELECT * FROM users";
        $result = $this->conn->select($sqlSelect);
        return $result;
    }

    function readUserRecords()
    {
        $fileName = $_FILES["file"]["tmp_name"];
        if ($_FILES["file"]["size"] > 0) {
            $file = fopen($fileName, "r");
            $importCount = 0;
            while (($column = fgetcsv($file, 10000, ",")) !== FALSE) {
                if (! empty($column) && is_array($column)) {
                    if ($this->hasEmptyRow($column)) {
                        continue;
                    }
                    if (isset($column[1], $column[3], $column[4])) {
                        $userName = $column[1];
                        $password = $column[2];
                        $firstName = $column[3];
                        $lastName = $column[4];
                        $insertId = $this->insertUser($userName, $password, $firstName, $lastName);
                        if (! empty($insertId)) {
                            $output["type"] = "success";
                            $output["message"] = "Import completed.";
                            $importCount ++;
                        }
                    }
                } else {
                    $output["type"] = "error";
                    $output["message"] = "Problem in importing data.";
                }
            }
            if ($importCount == 0) {
                $output["type"] = "error";
                $output["message"] = "Duplicate data found.";
            }
            return $output;
        }
    }

    function hasEmptyRow(array $column)
    {
        $columnCount = count($column);
        $isEmpty = true;
        for ($i = 0; $i < $columnCount; $i ++) {
            if (! empty($column[$i]) || $column[$i] !== '') {
                $isEmpty = false;
            }
        }
        return $isEmpty;
    }

    function insertUser($userName, $password, $firstName, $lastName)
    {
        $sql = "SELECT userName FROM users WHERE userName = ?";
        $paramType = "s";
        $paramArray = array(
            $userName
        );
        $result = $this->conn->select($sql, $paramType, $paramArray);
        $insertId = 0;
        if (empty($result)) {
            $hashedPassword = password_hash($password, PASSWORD_DEFAULT);
            $sql = "INSERT into users (userName,password,firstName,lastName)
                       values (?,?,?,?)";
            $paramType = "ssss";
            $paramArray = array(
                $userName,
                $hashedPassword,
                $firstName,
                $lastName
            );
            $insertId = $this->conn->insert($sql, $paramType, $paramArray);
        }
        return $insertId;
    }
}
?>

List imported data from the database

This is for closing the CSV to MySQL import process loop. With this step, the user experiences that the import is completed successfully.

It shows the imported data on the screen. Instead of showing a static message like ‘Imported successfully’, this will give a good user experience.

list.php

<?php
namespace Phppot;

$result = $userModel->getAllUser();
if (! empty($result)) {
    ?>
<h3>Imported records:</h3>
<table id='userTable'>
	<thead>
		<tr>
			<th>User Name</th>
			<th>First Name</th>
			<th>Last Name</th>
		</tr>
	</thead>
<?php
    foreach ($result as $row) {
        ?>
    <tbody>
		<tr>
			<td><?php  echo $row['userName']; ?></td>
			<td><?php  echo $row['firstName']; ?></td>
			<td><?php  echo $row['lastName']; ?></td>
		</tr>
                    <?php
    }
    ?>
    </tbody>
</table>
<?php 
} 
?>

Output: CSV to MySQL import

csv to mysql output screenshot
Download

Vincy
Written by Vincy, a web developer with 15+ years of experience and a Masters degree in Computer Science. She specializes in building modern, lightweight websites using PHP, JavaScript, React, and related technologies. Phppot helps you in mastering web development through over a decade of publishing quality tutorials.

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