How do I get the string (3h) from this JSON object only using "rain" with php (json_decode)?
{
"rain": {
"3h": 3.5
}
}
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3 Answers
$struct = json_decode('{
"rain": {
"3h": 3.5
}
}', true); // get as associative array
array_keys($struct["rain"])[0]; // "3h"
Or if you're not on PHP5.4
$keys = array_keys($struct["rain"]);
$keys[0]; // "3h";
Comments
There are a few options for getting at the properties of that rain object, which is, in essence, what you want to do:
$json = '{
"rain": {
"3h": 3.5
}
}';
$obj = json_decode($json);
$rain = $obj->rain;
$rain_properties = get_object_vars($rain);
// you now have an associative array that lists all keys and values for properties of the object
// you can look at the keys using
$rain_keys = array_keys($rain_properties);
echo $rain_keys[0]; // would give '3h' in this example
// or, you can iterate through the properties
foreach($rain_properties as $key => $value) {
echo $key; // would give '3h' on first iteration in this example
echo $value; // would give 3.5 in this example
}
Comments
$arr = json_decode('{ "rain": { "3h": 3.5 } }', true);
$arr2 = $arr['rain'];
$arr3 = array_keys($arr2);
var_dump($arr3[0]); // string(2) "3h"
