Fetching data from json array and comparing - php

Question

Hello i have a json array which contains an array structure. I am trying to fetch the value against a particular key. Like getting a key with name lower and value 9226. I have implemented for each loop but i cannot get into it. There is some issue in my comparison statement.
{
"tax_structure": [
{
"tax_data": {
"lower": 0,
"upper": 9225,
"tax_rate": 10,
"amount": 0
}
},
{
"tax_data": {
"lower": 9226,
"upper": 37450,
"tax_rate": 15,
"amount": 922.50
}
}
]
}
Php file:
<?php
$expense=10000;
$str_data = file_get_contents("data.json");
$data = json_decode($str_data,true);
foreach ($data["tax_structure"] as $tax_data) {
foreach ($tax_data["tax_data"] as $key => $value) {
if($key=="lower" && $expense>$value) & ($key=="upper" &&$expense<$value)
{
//do something if expenses value falls between the lower and upper limit values of keys
}
}
}
?>

Answer 1

I believe you are looking for something like the following.
There is no need for the second for loop.
$expense = 10000;
$str_data = file_get_contents("data.json");
$data = json_decode($str_data,true);
foreach ($data["tax_structure"] as $tax_data_object) {
if($tax_data_object['tax_data']['lower'] < $expense && $tax_data_object['tax_data']['upper'] > $expense){
// Do stuff
}
}
EDIT
You should try print_r($data);. This will show the structure of your data array.
If you examine the structure of your data the above code should be obvious.
If it isn't, here are a few sources for further learning:
PHP: Arrays
JSON introduction

Answer 2

<?php
$expense = 10000;
$str_data = file_get_contents("data.json");
$data = json_decode($str_data, true);
foreach ($data["tax_structure"] as $tax_data) {
foreach ($tax_data["tax_data"] as $key => $value) {
if ($key == "lower" && $expense > $value) {
echo "Key is lower and the value is " . $value . "<br>";
}
if ($key == "upper" && $expense < $value) {
echo "Key is upper and the value is " . $value . "<br>";
}
}
}
?>
You cant do this if($key=="lower" && $expense>$value) & ($key=="upper" &&$expense<$value)