php - access complex string data returned by curl -

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i'm having trouble accessing data being returned via curl. data returned complex string. complex because uses curly braces , looks array.

i tried access data array, eg. $var['key'], gave me error: warning: illegal string offset

here returned via curl:

string(1422) "{"transactions": [{"transaction_id":143720,"currency_adjustment":20,"offer_id":null,"offer_name":null,"description":"cash out","timestamp":"11\/19\/14"}, {"transaction_id":143718,"currency_adjustment":-10,"offer_id":null,"offer_name":null,"description":"cash out","timestamp":"11\/19\/14"}, {"transaction_id":143716,"currency_adjustment":-10,"offer_id":null,"offer_name":null,"description":"cash out","timestamp":"11\/19\/14"}, {"transaction_id":143672,"currency_adjustment":0.1,"offer_id":null,"offer_name":null,"description":"referral earnings","timestamp":"11\/19\/14"}]}"

i want gain access of currency_adjustment.

i tried this:

$response['currency_adjustment'] & {$response['currency_adjustment']}

how can access data in string?

$result = (array)json_decode($response); $data  = $result["transactions"]; echo $data[0]["currency_adjustment"];

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