Improve resource functions examples (#1435)

reference/var/functions/get-resource-id.xml

@@ -51,24 +51,23 @@
   &reftitle.examples;
   <para>
    <example>
-    <title><function>get_resource_id</function> example</title>
+    <title><function>get_resource_id</function> produces the same result as an <type>int</type> cast</title>
     <programlisting role="php">
 <![CDATA[
 <?php
-$handle = fopen('./storage/logs/lumen.log', 'rt');
+$handle = fopen("php://stdout", "w");
 
-echo (int) $handle . "\n\n";
+echo (int) $handle . "\n";
 
 echo get_resource_id($handle);
 
 ?>
 ]]>
     </programlisting>
-    &example.outputs;
+    &example.outputs.similar;
     <screen role="php">
 <![CDATA[
 698
-
 698
 ]]>
     </screen>

reference/var/functions/get-resource-type.xml

@@ -58,16 +58,22 @@
     <programlisting role="php">
 <![CDATA[
 <?php
-// prints: stream
 $fp = fopen("foo", "w");
 echo get_resource_type($fp) . "\n";
 
-// prints: curl
-$c = curl_init ();
-echo get_resource_type($c) . "\n"; // works prior to PHP 8.0.0 as since 8.0 curl_init returns a CurlHandle object
+// As of PHP 8.0.0, the following does not work anymore. The curl_init function returns a CurlHandle object now.
+$c = curl_init();
+echo get_resource_type($c) . "\n";
 ?>
 ]]>
     </programlisting>
+    &example.outputs.7;
+    <screen role="php">
+<![CDATA[
+stream
+curl
+]]>
+    </screen>
    </example>
   </para>
  </refsect1>

reference/var/functions/is-resource.xml

@@ -53,14 +53,20 @@
 <![CDATA[
 <?php
 
-$db_link = @mysql_connect('localhost', 'mysql_user', 'mysql_pass');
-if (!is_resource($db_link)) {
-    die('Can\'t connect : ' . mysql_error());
+$handle = fopen("php://stdout", "w");
+if (is_resource($handle)) {
+    echo '$handle is a resource';
 }
 
 ?>
 ]]>
     </programlisting>
+    &example.outputs;
+    <screen role="php">
+<![CDATA[
+$handle is a resource
+]]>
+    </screen>
    </example>
   </para>
  </refsect1>