This HTML5 document contains 4 embedded RDF statements represented using HTML+Microdata notation.

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PrefixNamespace IRI
isaphttp://webisa.webdatacommons.org/prov/
isahttp://webisa.webdatacommons.org/
n5dreamincode.
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
provhttp://www.w3.org/ns/prov#
xsdhhttp://www.w3.org/2001/XMLSchema#
Subject Item
isa:411886450
rdf:type
prov:Entity
prov:value
The objects you reference in your post are not PHP things, but HTML. Sure, PHP can create HTML, and especially process the data contained in those on submit, but the objects themselves?
prov:wasQuotedFrom
n5:net
Subject Item
isap:201665032
prov:wasDerivedFrom
isa:411886450