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$privilegeStrings = array_filter($privileges, function ($s) { return is_string($s); } );

Is there a better way to specify that I want just the string values in the given array?

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You could do:

$privilegeStrings = array_filter($privileges, 'is_string');

array_filter passes every value of the array to the specified function. So you can just specify the function name and everything will be taken care of.

Reference

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  • \$\begingroup\$ Ah.. didn't know you could pass the name of a function like that. Yuck! \$\endgroup\$ Mar 3 '11 at 20:58
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    \$\begingroup\$ @Billy ONeal - The name of a function is one acceptable form a callback may take. \$\endgroup\$ Mar 4 '11 at 3:19

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