Split tests/ibase_close_001.phpt into 3 tests

This patch splits `tests/ibase_close_001.phpt` into 3 tests so that we
can check for different error messages depending on which PHP version we
are running.

Author: Jon4t4n

tests/ibase_close_001.phpt

@@ -11,13 +11,9 @@ $x = ibase_connect($test_base);
 var_dump(ibase_close($x));
 var_dump(ibase_close($x));
 var_dump(ibase_close());
-var_dump(ibase_close('foo'));
 
 ?>
 --EXPECTF--
 bool(true)
 bool(true)
 bool(true)
-
-Warning: ibase_close() expects parameter 1 to be resource, string given in %s on line %d
-NULL

tests/ibase_close_002.phpt

@@ -0,0 +1,26 @@
+--TEST--
+ibase_close(): Make sure passing a string to the function emits a warning
+--SKIPIF--
+<?php
+include("skipif.inc");
+include("skipif-php8-or-newer.inc");
+?>
+--FILE--
+<?php
+
+require("interbase.inc");
+
+$x = ibase_connect($test_base);
+var_dump(ibase_close($x));
+var_dump(ibase_close($x));
+var_dump(ibase_close());
+var_dump(ibase_close('foo'));
+
+?>
+--EXPECTF--
+bool(true)
+bool(true)
+bool(true)
+
+Warning: ibase_close() expects parameter 1 to be resource, string given in %s on line %d
+NULL

tests/ibase_close_003.phpt

@@ -0,0 +1,25 @@
+--TEST--
+ibase_close(): Make sure passing a string to the function throws an error.
+--SKIPIF--
+<?php
+include("skipif.inc");
+include("skipif-php7-or-older.inc");
+?>
+--FILE--
+<?php
+
+require("interbase.inc");
+
+$x = ibase_connect($test_base);
+var_dump(ibase_close($x));
+var_dump(ibase_close($x));
+var_dump(ibase_close());
+var_dump(ibase_close('foo'));
+
+?>
+--EXPECTF--
+bool(true)
+bool(true)
+bool(true)
+
+Fatal error: Uncaught TypeError: ibase_close(): Argument #1 ($link_identifier) must be of type resource, string given in %a