<?php
$credentials = "Authorization: OAuth oauth_consumer_key=g3PdEVqZnBgaecDGpQjODcSLm, oauth_nonce=3346472044-54KLfYYlu9P1eAXN3Le3P8hgtzt4creTd41tfJRg3PdEVqZnBgaecDGpQjODcSLm1444413587932, oauth_signature=FHnxlpBl9h3ckb8GQLfw+D3FCaU=, oauth_signature_method=HMAC-SHA1, oauth_timestamp=1444413587, oauth_token=3346472044-54KLfYYlu9P1eAXN3Le3P8hgtzt4creTd41tfJR, oauth_version=1.0";
$arrayCredentials = explode(',',$credentials);
dump($arrayCredentials);
$needle = 'oauth_signature';
$ret = array_keys(array_filter($arrayCredentials, function($var) use ($needle){
return strpos($var, $needle) !== false;
}));
echo($ret);
preferences:
37.22 ms | 402 KiB | 5 Q