这是什么样的语法？

我认为这是html表单的某些序列化版本，但在此之后...

O:15:"ColoradoReindeer":23:{s:8:"repID";i:166;s:10:"*created";N;s:9:"slumber";s:7:"2398863";s:10:"cucumber";s:10:"73100.000";s:4:"name";s:8:"Test PTO";s:7:"company";s:12:"Test Company";s:7:"address";s:35:"1120 Avenue of the Test, 16th Floor";s:4:"city";s:8:"New York";s:5:"state";s:2:"NY";s:3:"zip";s:5:"10036";s:5:"phone";s:12:"212 555 5555";s:5:"email";s:17:"[email protected]";s:12:"serialnumber";s:7:"testing";s:14:"dateofpurchase";s:0:"";s:7:"product";s:7:"testing";s:11:"accessories";s:7:"testing";s:9:"packaging";s:44:" Lorem ipsum dolor sit amet, consectetur adipiscing elit..";s:15:"troublereported";s:7:"testing";s:6:"backup";s:34:" Lorem ipsum dolor sit amet, consectetur adipiscing elit..";s:8:"estimate";s:0:"";s:19:"*packagingOptions";a:4:{i:0;s:0:"";i:1;s:25:" Lorem ipsum dolor sit amet, consectetur adipiscing elit.";i:2;s:44:" Lorem ipsum dolor sit amet, consectetur adipiscing elit.";i:3;s:39:"Computer is generic.";}s:16:"*bOptions";a:4:{i:0;s:0:"";i:1;s:71:" Lorem ipsum dolor sit amet, consectetur adipiscing elits.";i:2;s:34:"Not accessible.";i:3;s:52:" Lorem ipsum dolor sit amet, consectetur adipiscing elit.";}s:15:"delivery_method";s:17:"They will deliver";}