@cladking don’t know how to read either hieroglyphs, nor hieratic, which were used during the time of Old Kingdom period (from dynasty 3 to dynasty 6).
There are only few hieroglyphic inscriptions in the 3 large pyramids of Giza. The only hieroglyphs of worth that was composed in the time of Khufu (the 2nd king in the 4th dynasty), relating to the largest pyramid, was discovered in 2013, a bunch of papyri about 130 km from Giza, in one of the harbour towns on the Red Sea coast.
These papyri are known as Merer's Logbook or Merer's Diary, because they contained diary entries of shipping supplies from the harbour to Giza, which included stones for the construction of Khufu's pyramid.
These are the oldest surviving papyri in Egypt, because papyri don't usually last from the Old Kingdom period. Most writings that do survive are usually written on walls and columns.
The hieroglyphs that are known as the Pyramid Texts, have nothing to do with the pyramids of Giza. The Pyramid Texts, in which cladking quoted are from either end of the 5th dynasty (pyramid of King Unas) or mostly from the 6th dynasty. These hieroglyphs were inscribed on the walls of pyramid chambers. The Pyramid Texts are only found in pyramids at Saqqara, not at Giza, and at different dynasties.
cladking don't know how to read the Pyramid Texts, and he obviously use translations by translators. That's he is claiming to know more about what the hieroglyphs than the people who actually translated, just sounded arrogant and deluded in his own ability to decipher what he cannot read.