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<?php $str = "AWS-HMAC-SHA256 Credential=eyJhbGciOiJIUzI1NiIsIngtc3MiOjEy/20160911/cn/user-service/request,SignedHeaders=host;x-aws-date, Signature=d9ee2d43f2067e4b8857f15fa8fff27820051d95a4ec31e93be866f201e0797a"; var_export(sscanf($str, 'AWS-HMAC-SHA256 Credential=%[^,],SignedHeaders=%[^,], Signature=%[^,]'));
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array ( 0 => 'eyJhbGciOiJIUzI1NiIsIngtc3MiOjEy/20160911/cn/user-service/request', 1 => 'host;x-aws-date', 2 => 'd9ee2d43f2067e4b8857f15fa8fff27820051d95a4ec31e93be866f201e0797a', )

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