PHILADELPHIA — Pennsylvania’s eleven casinos pulled in more than $233.1 million in gross slot machine revenue last month, setting an all-time monthly high since the state’s first casino opened in November 2006 and showing further evidence of its growing gambling market.

The slots totals released today include revenue from two test nights and one day of operations at the state’s 11th casino, Valley Forge Casino Resort, which opened on Saturday. Overall, the figures broke the previous monthly record of $218.3 million set in July, and they represent an 8.5 percent increase over March 2011.

When slots and table game revenues are combined, Pennsylvania has surpassed New Jersey and grown into the second-largest casino market in the country behind Nevada, said Joe Weinert, senior vice president of Spectrum Gaming Group, a New Jersey casino consulting firm, who called the state the “envy of the casino industry.”