How to Create a Google Chart from MySQL Data Using PHP?
PHP MySQL Google Chart JSON - Complete Example
This question pertains to generating Google Charts using a combination of PHP and MySQL. The use of Ajax is not covered in this particular example.
Usage
Requirements
- PHP
- Apache
- MySQL
Installation
- Create a database named "chart" using phpMyAdmin.
- Create a table named "googlechart" with two columns: "weekly_task" and "percentage."
- Insert sample data into the table, ensuring that the "percentage" column contains only numbers.
Code Examples
PHP-MySQL-JSON-Google Chart Example
<?php // Database connection $con = mysql_connect("localhost", "Username", "Password"); mysql_select_db("Database Name", $con); // Query $sth = mysql_query("SELECT * FROM chart"); // Data preparation $table['cols'] = array( array('label' => 'Weekly Task', 'type' => 'string'), array('label' => 'Percentage', 'type' => 'number') ); $rows = array(); while ($r = mysql_fetch_assoc($sth)) { $temp = array(); $temp[] = array('v' => (string)$r['Weekly_task']); $temp[] = array('v' => (int)$r['percentage']); $rows[] = array('c' => $temp); } $table['rows'] = $rows; $jsonTable = json_encode($table); // HTML ?> <html> <head> <script type="text/javascript" src="https://www.google.com/jsapi"></script> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script> <script type="text/javascript"> google.load('visualization', '1', {'packages':['corechart']}); google.setOnLoadCallback(drawChart); function drawChart() { var data = new google.visualization.DataTable(<?php echo $jsonTable; ?>); var options = { title: 'My Weekly Plan', is3D: 'true', width: 800, height: 600 }; var chart = new google.visualization.PieChart(document.getElementById('chart_div')); chart.draw(data, options); } </script> </head> <body> <div>
PHP-PDO-JSON-MySQL-Google Chart Example
<?php // Database connection $dbname = 'chart'; $username = 'root'; $password = '123456'; $conn = new PDO("mysql:host=localhost;dbname=$dbname", $username, $password); $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); // Query $result = $conn->query('SELECT * FROM googlechart'); // Data preparation $rows = array(); $table['cols'] = array( array('label' => 'Weekly Task', 'type' => 'string'), array('label' => 'Percentage', 'type' => 'number') ); foreach ($result as $r) { $temp = array(); $temp[] = array('v' => (string)$r['weekly_task']); $temp[] = array('v' => (int)$r['percentage']); $rows[] = array('c' => $temp); } $table['rows'] = $rows; $jsonTable = json_encode($table); // HTML ?> <html> <head> <script type="text/javascript" src="https://www.google.com/jsapi"></script> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script> <script type="text/javascript"> google.load('visualization', '1', {'packages':['corechart']}); google.setOnLoadCallback(drawChart); function drawChart() { var data = new google.visualization.DataTable(<?php echo $jsonTable; ?>); var options = { title: 'My Weekly Plan', is3D: 'true', width: 800, height: 600 }; var chart = new google.visualization.PieChart(document.getElementById('chart_div')); chart.draw(data, options); } </script> </head> <body> <div>
PHP-MySQLi-JSON-Google Chart Example
<?php // Database connection $DB_NAME = 'chart'; $DB_HOST = 'localhost'; $DB_USER = 'root'; $DB_PASS = '123456'; $mysqli = new mysqli($DB_HOST, $DB_USER, $DB_PASS, $DB_NAME); if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit(); } // Query $result = $mysqli->query('SELECT * FROM googlechart'); // Data preparation $rows = array(); $table['cols'] = array( array('label' => 'Weekly Task', 'type' => 'string'), array('label' => 'Percentage', 'type' => 'number') ); foreach ($result as $r) { $temp = array(); $temp[] = array('v' => (string)$r['weekly_task']); $temp[] = array('v' => (int)$r['percentage']); $rows[] = array('c' => $temp); } $table['rows'] = $rows; $jsonTable = json_encode($table); // HTML ?> <html> <head> <script type="text/javascript" src="https://www.google.com/jsapi"></script> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script> <script type="text/javascript"> google.load('visualization', '1', {'packages':['corechart']}); google.setOnLoadCallback(drawChart); function drawChart() { var data = new google.visualization.DataTable(<?php echo $jsonTable; ?>); var options = { title: 'My Weekly Plan', is3D: 'true', width: 800, height: 600 }; var chart = new google.visualization.PieChart(document.getElementById('chart_div')); chart.draw(data, options); } </script> </head> <body> <div>
Troubleshooting
If you encounter the following error:
syntax error var data = new google.visualization.DataTable(<?php echo $jsonTable; ?>);
This indicates that your environment does not support short tags. To resolve this issue, use this code instead:
<?php echo $jsonTable; ?>
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