How to create a REST API using PHP code example

Example 1: rest api example php

CREATE TABLE `Transaction` (
  `id` int(11)  UNSIGNED AUTO_INCREMENT PRIMARY KEY, 
  `comment` text,
  `price` float,
  `quantity` float,
  `reason` enum('New Stock','Usable Return','Unusable Return'),
  `createdAt` datetime NOT NULL,
  `updatedAt` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `productid` int(11) NOT NULL
);

Example 2: rest api php mysql

<?php	include_once('config.php');	$task = isset($_GET['task']) ? mysqli_real_escape_string($conn, $_GET['task']) :  "";	$sql = "SELECT * FROM `my_to_do_db`.`my_to_do_tb` WHERE task='{$task}';";	$get_data_query = mysqli_query($conn, $sql) or die(mysqli_error($conn));		if(mysqli_num_rows($get_data_query)!=0){		$result = array();				while($r = mysqli_fetch_array($get_data_query)){			extract($r);			$result[] = array("Task" => $task, "Date" => $date, 'Priority' => $priority);		}		$json = array("status" => 1, "info" => $result);	}	else{		$json = array("status" => 0, "error" => "To-Do not found!");	}@mysqli_close($conn);// Set Content-type to JSONheader('Content-type: application/json');echo json_encode($json);