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我使用paypal api进行重复计费.我想用paypal api更新计划价格.为此,我正在使用

$curl = curl_init();

curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_URL, 'https://api-3t.sandbox.paypal.com/nvp');
curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query(array(
    'USER' => 'ddsds_da_api',
    'PWD' => '123412432134',
    'SIGNATURE' => 'sgdsdshds',

    'METHOD' => 'UpdateRecurringPaymentsProfile',
    'VERSION' => '108',
    'PROFILEID' => 'I-FYYMDB55ADSH',

    'NOTE' => 'Uma nota opcional, explicando o motivo da mudança',
    'AMT' => 120,
    'CURRENCYCODE' => 'BRL'
)));

$response =    curl_exec($curl);

curl_close($curl);

$nvp = array();

if (preg_match_all('/(?<name>[^\=]+)\=(?<value>[^&]+)&?/', $response, $matches)) {
    foreach ($matches['name'] as $offset => $name) {
        $nvp[$name] = urldecode($matches['value'][$offset]);
    }
} …