How to Create a Google Chart Using PHP, MySQL, and JSON: A Comprehensive Example

PHP MySQL Google Chart JSON: A Comprehensive Example

Question:

This question-and-answer section presents a detailed example of generating a Google Chart using data retrieved from a MySQL table. The main focus is on combining PHP and MySQL to achieve this task. Variations in implementation using different PHP database interfaces like PDO and MySQLi are also discussed.

Usage:

Installation and Requirements:

• Create a MySQL database named "chart"

• Within this database, create a table called "googlechart" with the following column structure:

  • weekly_task (VARCHAR)
  • percentage (INT)

Data Example:

Insert sample data into the "googlechart" table, with "percentage" values representing numerical values only:

PHP-MySQL-JSON-Google Chart Example (without Ajax):

This example uses vanilla PHP and MySQL and includes code with and without the short tag, which can lead to syntax errors if not supported by the environment.

The PHP code establishes a connection to the MySQL database, executes a query to retrieve data from the googlechart table, and populates a data table with the weekly_task and percentage values using the JSON format.

PHP-PDO-JSON-MySQL-Google Chart Example:

PDO is another PHP database interface that provides a more object-oriented approach. The example demonstrated encompasses connection establishment, data retrieval, and generation of JSON data.

PHP-MySQLi-JSON-Google Chart Example:

MySQLi offers slightly different functionality than PDO and is utilized for database connectivity, data retrieval, and JSON data preparation.

Google Chart Visualization:

A Google Charts-specific JavaScript file in the HTML page is responsible for creating a PieChart using the JSON data provided by the PHP script.

Short Tag Support:

Some environments may require replacing short tags with the alternative syntax due to potential syntax errors. It is recommended to use the alternative approach if issues arise with short tags.

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