PHP Decode

<?php declare(strict_types=1);return[base64_decode('dW5zb3J0ZWQgbnVtZXJpYyBhcnJheSBzdGlsbCBmaW5kcyBtYXRjaCB3aXRoIHR5cGUgMT8=')=>[2,2,[2,0,4,3],1,],base64_decode('dW5zb3J0ZWQgYXJyYXkgc3RpbGwgZmluZHMgbWF0Y2ggd2l0aCB0eXBlIDE/')=>[6,base64_decode('QW1wbGl0dWRl'),[base64_decode('QWFyZHZhcms='),base64_decode('QXBwbGU='),base64_decode('QX4qZQ=='),base64_decode('QSpl'),base64_decode('QVtzb2x2ZQ=='),base64_decode('QW1wbGl0dWRl'),base64_decode('QWR2ZXJzZQ=='),base64_decode('QXBhcnRtZW50')],1,],[1,2,[2,3,4,3],0,],[base64_decode('I04vQQ=='),2,[1,0,4,3],0,],[1,2,[2,0,0,3],0,],[2,0,[2,0,0,3],0,],[1,2,[2,3,4,3],1,],[3,2,[2,0,0,3],1,],[4,4,[2,0,0,3],1,],[1,2,[2,0,0,3],-1,],[4,2,[3,3,4,5],-1,],[1,5,[8,4,3,2],-1,],[base64_decode('I04vQQ=='),6,[3,5,6,8],-1,],[1,6,[8,5,4,2],-1,],[3,4,[5,8,4,2],-1,],[2,4,[8,8,3,2],-1,],[4,4,[2,0,0,3],null,],[3,4,[1,null,4,null,8],1,],[3,5,[1,null,4,null,null],1,],base64_decode('MCBkb2VzIG5vdCBtYXRjaCB4')=>[3,base64_decode('eA=='),[0,0,base64_decode('eA=='),base64_decode('eA=='),base64_decode('eA==')],0,],[2,base64_decode('YQ=='),[false,base64_decode('YQ=='),1],-1,],[base64_decode('I04vQQ=='),0,[base64_decode('eA=='),true,false],-1,],[base64_decode('I04vQQ=='),true,[base64_decode('YQ=='),base64_decode('Yg=='),base64_decode('Yw==')],-1,],[base64_decode('I04vQQ=='),true,[0,1,2],-1,],[base64_decode('I04vQQ=='),true,[0,1,2],0,],[base64_decode('I04vQQ=='),true,[0,1,2],1,],[1,true,[true,true,true],-1,],[1,true,[true,true,true],0,],[3,true,[true,true,true],1,],[5,6,[true,false,base64_decode('YQ=='),base64_decode('eg=='),222222,2,99999999],-1,],[4,4.6,[1,2,3,4,5],1,],[4,4,[1,2,3,3.8,5],1,],[base64_decode('I04vQQ=='),6,[true,false,base64_decode('YQ=='),base64_decode('eg=='),2,888],-1,],base64_decode('bnVtYmVyIGNvbXBhcmVkIHRvIHN0cmluZyB0eXBlIC0x')=>[base64_decode('I04vQQ=='),6,[base64_decode('Ng==')],-1,],base64_decode('bnVtYmVyIGNvbXBhcmVkIHRvIHN0cmluZyB0eXBlIDA=')=>[base64_decode('I04vQQ=='),6,[base64_decode('Ng==')],0,],base64_decode('bnVtYmVyIGNvbXBhcmVkIHRvIHN0cmluZyB0eXBlIDE=')=>[base64_decode('I04vQQ=='),6,[base64_decode('Ng==')],1,],base64_decode('c3RyaW5nIGNvbXBhcmVkIHRvIG51bWJlciB0eXBlIC0x')=>[base64_decode('I04vQQ=='),base64_decode('Ng=='),[6],-1,],base64_decode('c3RyaW5nIGNvbXBhcmVkIHRvIG51bWJlciB0eXBlIDA=')=>[base64_decode('I04vQQ=='),base64_decode('Ng=='),[6],0,],base64_decode('c3RyaW5nIGNvbXBhcmVkIHRvIG51bWJlciB0eXBlIDE=')=>[base64_decode('I04vQQ=='),base64_decode('Ng=='),[6],1,],[2,base64_decode('YT9i'),[base64_decode('YQ=='),base64_decode('YWJi'),base64_decode('YXhj')],0,],[1,base64_decode('YSo='),[base64_decode('YUFBQUFBQUE='),base64_decode('YXM='),base64_decode('YXo=')],0,],[3,base64_decode('MSoxMSox'),[base64_decode('YWJj'),base64_decode('ZWZo'),base64_decode('MWExMWIx')],0,],[3,base64_decode('MSoxMSox'),[base64_decode('YWJj'),base64_decode('ZWZo'),base64_decode('MWExMWIx')],0,],[2,base64_decode('YSp+KmM='),[base64_decode('YUFBQUFB'),base64_decode('YTEyMzQ1Nipj'),base64_decode('YXo='),base64_decode('YWxlbWJpYw==')],0,],[3,base64_decode('YSoxMjMqYg=='),[base64_decode('YUFBQUFB'),base64_decode('YTEyMzQ1Nipj'),base64_decode('YTk5OTk5MTIzYg==')],0,],[1,base64_decode('Kg=='),[base64_decode('YUFBQUFB'),base64_decode('YTExMTEyMzQ1Nipj'),base64_decode('cXE=')],0,],[2,base64_decode('Pw=='),[base64_decode('YUFBQUFB'),base64_decode('YQ=='),base64_decode('YTk5OTk5MTIzYg==')],0,],[base64_decode('I04vQQ=='),base64_decode('Pw=='),[1,22,333],0,],[3,base64_decode('Pz8/'),[1,22,base64_decode('YWFh')],0,],[3,base64_decode('Kg=='),[1,22,base64_decode('YWFh')],0,],[base64_decode('I04vQQ=='),base64_decode('YWJj'),[1,22,base64_decode('YWFh')],0,],[base64_decode('I04vQQ=='),new 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