As bishop, he was a consistent ally of Count Theobald IV of Champagne, in whose county his diocese lay.
[2] Sometime between 1210 and 1215, Philip assisted at the ceremony where the abbot of Coulombs swore an oath to the bishop upon taking over the spiritual direction of the church of Saint-Germain-en-Laye.
In 1227, Philip succeeded Ernaud de Cuverville as dean of the chapter at Notre Dame, although he was not formally invested for at least year.
In a third round of voting, the leading candidates were initially Barthélémy, canon of Orléans, and Robert de Thorotte, brother of the bishop of Verdun.
His election has been credited to the influence of his aged father and of Queen Blanche of Castile, then regent of the kingdom for her son, Louis IX.
Philip threatened Alice with excommunication, but in November 1234 he affixed his seal to the act of cession and indemnity that settled the dispute.
[2] In 1237, Philip sat on a three-bishop panel that determined the form of the homage to be performed by Joan, Countess of Flanders.