Search for a value in JSON using php - php

Question

I have a JSON file in this format:
[
["name","purpose","description"],
["name2","purpose2","description2"],
["name3","purpose3","description3"]
]
Now, I have got the solutions for finding them by key. But, my JSON doesn't have keys. How can I search inside this JSON object to find second element by using "purpose2"? Also, I need to display the second element (i.e. "name2","purpose2","description2").
I used this function, but it's not helping me out.
function searchJson($obj, $value) {
foreach($obj as $item) {
foreach($item as $child) {
if(isset($child) && $child == $value) {
return $child;
}
}
}
return null;
}
Thanks in advance !

Answer 1

As the json data doesn't have string keys upon which to search you can branch the logic in the function to test for numeric indexes and then use in_array perhaps
$json = '[["name","purpose","description"],["name2","purpose2","description2"],["name3","purpose3","description3"]]';
function searchJson( $obj, $value ) {
foreach( $obj as $key => $item ) {
if( !is_nan( intval( $key ) ) && is_array( $item ) ){
if( in_array( $value, $item ) ) return $item;
} else {
foreach( $item as $child ) {
if(isset($child) && $child == $value) {
return $child;
}
}
}
}
return null;
}
$data = json_decode( $json );
$results = searchJson( $data , 'purpose2' );
print_r( $results );