You are looking at the HTML representation of the PHP format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information.
a:1:{s:5:"query";a:1:{s:10:"namespaces";a:36:{i:-2;a:4:{s:2:"id";i:-2;s:4:"case";s:12:"first-letter";s:1:"*";s:5:"Media";s:9:"canonical";s:5:"Media";}i:-1;a:4:{s:2:"id";i:-1;s:4:"case";s:12:"first-letter";s:1:"*";s:7:"Special";s:9:"canonical";s:7:"Special";}i:0;a:4:{s:2:"id";i:0;s:4:"case";s:12:"first-letter";s:1:"*";s:0:"";s:7:"content";s:0:"";}i:1;a:5:{s:2:"id";i:1;s:4:"case";s:12:"first-letter";s:1:"*";s:4:"Talk";s:8:"subpages";s:0:"";s:9:"canonical";s:4:"Talk";}i:2;a:5:{s:2:"id";i:2;s:4:"case";s:12:"first-letter";s:1:"*";s:4:"User";s:8:"subpages";s:0:"";s:9:"canonical";s:4:"User";}i:3;a:5:{s:2:"id";i:3;s:4:"case";s:12:"first-letter";s:1:"*";s:9:"User talk";s:8:"subpages";s:0:"";s:9:"canonical";s:9:"User talk";}i:4;a:4:{s:2:"id";i:4;s:4:"case";s:12:"first-letter";s:1:"*";s:10:"Navigators";s:9:"canonical";s:7:"Project";}i:5;a:5:{s:2:"id";i:5;s:4:"case";s:12:"first-letter";s:1:"*";s:14:"NavigatorsTalk";s:8:"subpages";s:0:"";s:9:"canonical";s:12:"Project talk";}i:6;a:4:{s:2:"id";i:6;s:4:"case";s:12:"first-letter";s:1:"*";s:4:"File";s:9:"canonical";s:4:"File";}i:7;a:5:{s:2:"id";i:7;s:4:"case";s:12:"first-letter";s:1:"*";s:9:"File talk";s:8:"subpages";s:0:"";s:9:"canonical";s:9:"File talk";}i:8;a:5:{s:2:"id";i:8;s:4:"case";s:12:"first-letter";s:1:"*";s:9:"MediaWiki";s:8:"subpages";s:0:"";s:9:"canonical";s:9:"MediaWiki";}i:9;a:5:{s:2:"id";i:9;s:4:"case";s:12:"first-letter";s:1:"*";s:14:"MediaWiki talk";s:8:"subpages";s:0:"";s:9:"canonical";s:14:"MediaWiki talk";}i:10;a:4:{s:2:"id";i:10;s:4:"case";s:12:"first-letter";s:1:"*";s:8:"Template";s:9:"canonical";s:8:"Template";}i:11;a:5:{s:2:"id";i:11;s:4:"case";s:12:"first-letter";s:1:"*";s:13:"Template talk";s:8:"subpages";s:0:"";s:9:"canonical";s:13:"Template talk";}i:12;a:4:{s:2:"id";i:12;s:4:"case";s:12:"first-letter";s:1:"*";s:4:"Help";s:9:"canonical";s:4:"Help";}i:13;a:5:{s:2:"id";i:13;s:4:"case";s:12:"first-letter";s:1:"*";s:9:"Help talk";s:8:"subpages";s:0:"";s:9:"canonical";s:9:"Help talk";}i:14;a:4:{s:2:"id";i:14;s:4:"case";s:12:"first-letter";s:1:"*";s:8:"Category";s:9:"canonical";s:8:"Category";}i:15;a:5:{s:2:"id";i:15;s:4:"case";s:12:"first-letter";s:1:"*";s:13:"Category talk";s:8:"subpages";s:0:"";s:9:"canonical";s:13:"Category talk";}i:100;a:4:{s:2:"id";i:100;s:4:"case";s:12:"first-letter";s:1:"*";s:11:"Publication";s:9:"canonical";s:11:"Publication";}i:101;a:4:{s:2:"id";i:101;s:4:"case";s:12:"first-letter";s:1:"*";s:15:"PublicationTalk";s:9:"canonical";s:15:"PublicationTalk";}i:120;a:4:{s:2:"id";i:120;s:4:"case";s:12:"first-letter";s:1:"*";s:7:"Project";s:9:"canonical";s:7:"Project";}i:121;a:4:{s:2:"id";i:121;s:4:"case";s:12:"first-letter";s:1:"*";s:11:"ProjectTalk";s:9:"canonical";s:11:"ProjectTalk";}i:140;a:4:{s:2:"id";i:140;s:4:"case";s:12:"first-letter";s:1:"*";s:6:"Person";s:9:"canonical";s:6:"Person";}i:141;a:4:{s:2:"id";i:141;s:4:"case";s:12:"first-letter";s:1:"*";s:10:"PersonTalk";s:9:"canonical";s:10:"PersonTalk";}i:150;a:4:{s:2:"id";i:150;s:4:"case";s:12:"first-letter";s:1:"*";s:12:"ResearchLine";s:9:"canonical";s:12:"ResearchLine";}i:151;a:4:{s:2:"id";i:151;s:4:"case";s:12:"first-letter";s:1:"*";s:16:"ResearchLineTalk";s:9:"canonical";s:16:"ResearchLineTalk";}i:200;a:4:{s:2:"id";i:200;s:4:"case";s:12:"first-letter";s:1:"*";s:7:"Private";s:9:"canonical";s:7:"Private";}i:201;a:4:{s:2:"id";i:201;s:4:"case";s:12:"first-letter";s:1:"*";s:11:"PrivateTalk";s:9:"canonical";s:11:"PrivateTalk";}i:250;a:5:{s:2:"id";i:250;s:4:"case";s:12:"first-letter";s:1:"*";s:9:"Candidate";s:9:"canonical";s:9:"Candidate";s:7:"content";s:0:"";}i:251;a:4:{s:2:"id";i:251;s:4:"case";s:12:"first-letter";s:1:"*";s:13:"CandidateTalk";s:9:"canonical";s:13:"CandidateTalk";}i:302;a:4:{s:2:"id";i:302;s:4:"case";s:12:"first-letter";s:1:"*";s:8:"Property";s:9:"canonical";s:8:"Property";}i:303;a:5:{s:2:"id";i:303;s:4:"case";s:12:"first-letter";s:1:"*";s:13:"Property talk";s:8:"subpages";s:0:"";s:9:"canonical";s:13:"Property talk";}i:306;a:4:{s:2:"id";i:306;s:4:"case";s:12:"first-letter";s:1:"*";s:4:"Form";s:9:"canonical";s:4:"Form";}i:307;a:5:{s:2:"id";i:307;s:4:"case";s:12:"first-letter";s:1:"*";s:9:"Form talk";s:8:"subpages";s:0:"";s:9:"canonical";s:9:"Form talk";}i:308;a:4:{s:2:"id";i:308;s:4:"case";s:12:"first-letter";s:1:"*";s:7:"Concept";s:9:"canonical";s:7:"Concept";}i:309;a:4:{s:2:"id";i:309;s:4:"case";s:12:"first-letter";s:1:"*";s:12:"Concept talk";s:9:"canonical";s:12:"Concept talk";}}}}