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Counting elements in arrays

The count( ) function returns the number of elements in the array var:

integer count(mixed var)

The following example prints 7 as expected:

$days = array("Mon", "Tue", "Wed", "Thu",
              "Fri", "Sat", "Sun");

echo count($days);  // 7

The count( ) function works on any variable type and returns 0 when either an empty array or a variable that isn't set is examined. If there is any doubt, isset( ) and is_array( ) should be used to check the variable being considered.

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