3v4l.org

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<?php var_dump(unserialize('a:2:{s:8:"provider";s:0:"";s:9:"meteoprog";a:3:{s:5:"login";s:0:"";s:8:"password";s:0:"";s:3:"url";s:0:"";}}'));
Output for 4.3.0 - 7.1.0
array(2) { ["provider"]=> string(0) "" ["meteoprog"]=> array(3) { ["login"]=> string(0) "" ["password"]=> string(0) "" ["url"]=> string(0) "" } }