How to add query parameters in PHP code database output - php

Question

I have tasks.php file which shows all results of database.
I'm now looking to add query parameters in the URL that would result in "tasks.php/query=books" that would only show raw data showing data that contains "books" in columns Task_title or task_description from my SQL database.
Say if query="" then return all tasks and if query=somevalue then filter based on it.
I have tried creating a separate file for search query with success, but I need to include in this tasks.php for app dev and I'm not sure how to integrate.
Here is my tasks.php
<?php
// Create connection
$con=mysqli_connect("test","test","test","test");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
// Select all of our stocks from table 'stock_tracker'
$sql = "
SELECT * FROM `tasks` ORDER BY `tasks`.`date_added` DESC
";
$cValue=str_replace(array("'",",","."), array("&#039;","&#44;","&#46;"), $_POST['contractValue']);
// Confirm there are results
if ($result = mysqli_query($con, $sql))
{
// We have results, create an array to hold the results
// and an array to hold the data
$resultArray = array();
$tempArray = array();
// Loop through each result
while($row = $result->fetch_object())
{
// Add each result into the results array
$tempArray = $row;
array_push($resultArray, $tempArray);
}
// Encode the array to JSON and output the results
echo json_encode($resultArray, DEFINED('JSON_INVALID_UTF8_IGNORE') ? JSON_INVALID_UTF8_IGNORE : 0);
}
// Close connections
mysqli_close($con);
?>

Answer 1

Step 1.
In Url it should be - tasks.php?query=books instead of tasks.php/query=books
Step 2.
Get your query value form url
$search_key = $_GET['query'];
Step 3.
Change your select query.
SELECT * FROM `tasks` WHERE `Task_title` LIKE '%$search_key%' OR `task_description` LIKE '%$search_key%' ORDER BY `tasks`.`date_added` DESC