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12 years ago
A freed statement is not "empty()", it's still a resource:

<?php
$con=oci_connect(/*connect*/);
$q=oci_parse($con,"SELECT sysdate FROM dual");
var_dump($q); // resource(5) of type (oci8 statement)
var_dump(empty($q)); // bool(false)
var_dump(oci_statement_type($q)); // string(6) "SELECT"
echo "------\n";
oci_execute($q);
var_dump($q); // same as above
var_dump(empty($q));
var_dump(oci_statement_type($q));
echo "------\n";
oci_free_statement($q);
var_dump($q); // resource(5) of type (Unknown)
var_dump(empty($q)); // bool(false)
var_dump(oci_statement_type($q)); // generates warning and returns false
oci_close($con);
?>

So far I can not think of a way to determine if a statement is freed without using an additional flag...
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