Split tests/ibase_num_fields_001.phpt into 4 tests

This patch splits `tests/ibase_num_fields_001.phpt` into 4 tests so that
we can check for different error messages depending on which PHP version
we are running.

Author: Jon4t4n

tests/ibase_num_fields_001.phpt

@@ -11,15 +11,6 @@ $x = ibase_connect($test_base);
 
 var_dump(ibase_num_fields(ibase_query('SELECT * FROM test1')));
 
-var_dump(ibase_num_fields(1));
-var_dump(ibase_num_fields());
-
 ?>
 --EXPECTF--
 int(2)
-
-Warning: ibase_num_fields() expects parameter 1 to be resource, int given in %s on line %d
-NULL
-
-Warning: ibase_num_fields() expects exactly 1 parameter, 0 given in %s on line %d
-NULL

tests/ibase_num_fields_002.phpt

@@ -0,0 +1,20 @@
+--TEST--
+ibase_num_fields(): Make sure passing an integer or zero args to the function emits a warning
+--SKIPIF--
+<?php
+include("skipif.inc");
+include("skipif-php8-or-newer.inc");
+?>
+--FILE--
+<?php
+
+var_dump(ibase_num_fields(1));
+var_dump(ibase_num_fields());
+
+?>
+--EXPECTF--
+Warning: ibase_num_fields() expects parameter 1 to be resource, int given in %s on line %d
+NULL
+
+Warning: ibase_num_fields() expects exactly 1 parameter, 0 given in %s on line %d
+NULL

tests/ibase_num_fields_003.phpt

@@ -0,0 +1,15 @@
+--TEST--
+ibase_num_fields(): Make sure passing an integer to the function throws an error.
+--SKIPIF--
+<?php
+include("skipif.inc");
+include("skipif-php7-or-older.inc");
+?>
+--FILE--
+<?php
+
+var_dump(ibase_num_fields(1));
+
+?>
+--EXPECTF--
+Fatal error: Uncaught TypeError: ibase_num_fields(): Argument #1 ($query_result) must be of type resource, int given in %a

tests/ibase_num_fields_004.phpt

@@ -0,0 +1,15 @@
+--TEST--
+ibase_num_fields(): Make sure passing zero arguments to the function throws an error
+--SKIPIF--
+<?php
+include("skipif.inc");
+include("skipif-php7-or-older.inc");
+?>
+--FILE--
+<?php
+
+var_dump(ibase_num_fields());
+
+?>
+--EXPECTF--
+Fatal error: Uncaught ArgumentCountError: ibase_num_fields() expects exactly 1 argument, 0 given in %a