The striker, who spent the past three years at AZ Alkmaar, has moved for 5 million euros, according to media reports.
Rotterdam-born El Hamdaoui was top scorer in the Dutch league in 2008/09 with 23 goals.
He started his career at Excelsior Rotterdam before joining Tottenham Hotspur in 2005. But he failed to start a game for Spurs and left for Willem II Tilburg.
El Hamdaoui's goals helped AZ win the Dutch title in 2009.
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