Description:
------------
In PHP 5.6, if a boolean value is compared with an int, it's cast to int, so true == 1 and false == 0. In PHP 7.0 and 7.1, the comparison true == 1 returns false.

The script below works as expected on PHP 5.6 but doesn't on PHP 7.

Unlike https://bugs.php.net/bug.php?id=74703, this behavior doesn't depend on whether Opcache is enabled or not.

Test script:
---------------
$dsn = 'HOSTNAME=localhost;UID=db2inst1;PWD=Passw0rd;DATABASE=test';
$conn = db2_connect($dsn, null, null);

if (!$conn) {
    echo db2_conn_errormsg(), PHP_EOL;
    exit(1);
}

$stmt = db2_prepare($conn, 'SELECT 1 FROM SYSIBM.SYSDUMMY1 WHERE 1 = ?');

db2_execute($stmt, [true]);
var_dump(db2_fetch_array($stmt));

db2_execute($stmt, [1]);
var_dump(db2_fetch_array($stmt));

Expected result:
----------------
array(1) {
  [0]=>
  int(1)
}
array(1) {
  [0]=>
  int(1)
}


Actual result:
--------------
bool(false)
array(1) {
  [0]=>
  int(1)
}