How to parse json object

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PHP

JSON

i am new in json i have get the following json string from my app now i want to parse it in php but this syntax (logjson=) in json file is confused me that now how i can the display it?

logjson='[{"Ct":"aaa","Er":"1","Ve":"1","Ie":"12","Date":"15-7-22","We":"15-7-21"},{"Ct":"a2a","Er":"21","Ve":"21","Ie":"212","Date":"25-7-22","We":"95-7-21"}]'

What I have tried:

if(isset($_POST['logjson']))
 {$someArray = json_decode(file_get_contents('php://input'), true);
file_put_contents('test.txt',$someArray[logjson]["Count"]);

}

it show me only empty text file .