PHP - make query to JSON file with AND condition

I’m trying to query some data from a JSON file with PHP, i want to get objects based on string and number.

Here’s my JSON:

[
    {
        "id": "5V28tqJ1",
        "string": "john doe",
        "number": 1,
        "aArray": [
            "cc",
            "kk",
            "lo",
            "mm"
        ],
        "bool": false,
        "createdAt": "2020-01-02T15:16:11",
        "updatedAt": "2020-01-05T19:37:02"
    },
    {
        "id": "PMuKM818",
        "string": "sarah doe",
        "number": 2,
        "aArray": [
            "bb",
            "cc"
        ],
        "bool": true,
        "createdAt": "2020-01-02T16:16:23",
        "updatedAt": "2020-01-05T19:37:14"
    },
    {
        "id": "m8HSbEQe",
        "string": "bob smith",
        "number": 3,
        "aArray": [
            "dd",
            "ee",
            "ff"
        ],
        "bool": false,
        "createdAt": "2020-01-02T17:16:36",
        "updatedAt": "2020-01-05T19:37:32"
    }
]

Here’s my query-user.php script:

<?php include 'header.php';
$string = $_GET['string'];
$aArray = $_GET['aArray'];
$number = $_GET['number'];
$bool = $_GET['bool'];

$data = file_get_contents($className. '.json');
$data = json_decode($data);
	
$results = array();

for ($i=0; $i<count($data); $i++) {
	
	// check value in string
	if(isset($string)){
		if (strpos($data[$i]->string, $string) !== false) {
			array_push($results, $data[$i]);
		}
	}
	
	// check element in array
	if(isset($aArray)){
		if (in_array($aArray, $data[$i]->aArray)) {
			array_push($results, $data[$i]);
		} 
	}
	
	// check value in number
	if(isset($number)){
		if (strpos($data[$i]->number, $number) !== false) {
			array_push($results, $data[$i]);
		} 
	}
	
	// check value in bool
	if(isset($bool)){
		if ($data[$i]->bool == $bool) {
			array_push($results, $data[$i]);
		}
	}
	
}// ./ for

echo json_encode($results, JSON_PRETTY_PRINT);
?>

On my browser, I call the following url:

http://example.com/users/query-user.php?string=doe&number=2

Here’s what I get as result:

[ 
{ "id": "5V28tqJ1", "string": "john doe", "number": 1, "aArray": [ "cc", "kk", "lo", "mm" ], "bool": false, "createdAt": "2020-01-02T15:16:11", "updatedAt": "2020-01-05T19:37:02" }, 
{ "id": "PMuKM818", "string": "sarah doe", "number": 2, "aArray": [ "bb", "cc" ], "bool": true, "createdAt": "2020-01-02T16:16:23", "updatedAt": "2020-01-05T19:37:14" },
{ "id": "PMuKM818", "string": "sarah doe", "number": 2, "aArray": [ "bb", "cc" ], "bool": true, "createdAt": "2020-01-02T16:16:23", "updatedAt": "2020-01-05T19:37:14" }
 ]

As you can see, I get the object with ID PMuKM818 twice, while I should get it once, together with the first object.

What am I doing wrong in my php code?

For quick answer you just need to use: https://www.php.net/manual/en/function.array-column

What is fastest way to process json objects.

UPDATE:

for full your code correct please use: https://www.php.net/manual/en/function.array-search

combinate with array_column, what way you will search more faster then one by one.

The object with the ID PMuKM818 corresponds to both of your query parameters: it contains Doe and also has the number 2.

If you want to prevent that, either set an order of precedence for your filters using if else statements instead of simple if, or add a check for existing ids in the resulting array before adding the element.

ADDITIONAL EDIT

Not the most elegant solution but it does what you need:

foreach ($data as $details) {

    // check value in string
    if(isset($string)){
        if (strpos($details->string, $string) !== false) {
            $results[$details->id] = $details;
        }
    }

    // check element in array
    if(isset($aArray)){
        if (in_array($aArray, $details->aArray)) {
            $results[$details->id] = $details;
        } 
    }

    // check value in number
    if(isset($number)){
        if (strpos($details->number, $number) !== false) {
            $results[$details->id] = $details;
        } 
    }

    // check value in bool
    if(isset($bool)){
        if ($details->bool == $bool) {
            $results[$details->id] = $details;
        }
    }

}// ./ for

echo json_encode(array_values($results), JSON_PRETTY_PRINT);

I've also replaced the for loop with a foreach, but that should not impact on the result