New cURL tests. Tested on Windows, Linux and Linux 64 bit

ext/curl/tests/curl_version_error.phpt

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+--TEST--
+Test curl_version() function : error conditions
+--SKIPIF--
+<?php 
+if (!extension_loaded("curl") || false === getenv('PHP_CURL_HTTP_REMOTE_SERVER')) {
+	die('skip - curl extension not available in this build'); 
+}
+?>
+--FILE--
+<?php
+
+/* Prototype  : array curl_version  ([ int $age  ] )
+ * Description: Returns information about the cURL version.
+ * Source code: ext/curl/interface.c
+*/
+
+echo "*** Testing curl_version() : error conditions ***\n";
+
+echo "\n-- Testing curl_version() function with more than expected no. of arguments --\n";
+$extra_arg = 10;
+var_dump( curl_version(1, $extra_arg) );
+
+?>
+===Done===
+--EXPECTF--
+*** Testing curl_version() : error conditions ***
+
+-- Testing curl_version() function with more than expected no. of arguments --
+
+Warning: curl_version() expects at most 1 parameter, 2 given in %s on line %d
+NULL
+===Done===

ext/curl/tests/curl_version_variation1.phpt

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+--TEST--
+Test curl_version() function : usage variations - test values for $ascii argument
+--SKIPIF--
+<?php 
+if (!extension_loaded("curl") || false === getenv('PHP_CURL_HTTP_REMOTE_SERVER')) {
+	die('skip - curl extension not available in this build'); 
+}
+?>
+--FILE--
+<?php
+
+/* Prototype  : array curl_version  ([ int $age  ] )
+ * Description: Returns information about the cURL version.
+ * Source code: ext/curl/interface.c
+*/
+
+echo "*** Testing curl_version() function: with unexpected inputs for 'age' argument ***\n";
+
+//get an unset variable
+$unset_var = 'string_val';
+unset($unset_var);
+
+//defining a class
+class sample  {
+  public function __toString() {
+    return "sample object";
+  } 
+}
+
+//getting the resource
+$file_handle = fopen(__FILE__, "r");
+
+// array with different values for $input
+$inputs =  array (
+
+  // integer values
+  0,
+  1,
+  255,
+  256,
+  PHP_INT_MAX,
+  -PHP_INT_MAX,
+
+  // float values
+  10.5,
+  -20.5,
+  10.1234567e10,
+
+  // array values
+  array(),
+  array(0),
+  array(1, 2),
+  
+  //string values
+  "ABC",
+  'abc',
+  "2abc",
+
+  // boolean values
+  true,
+  false,
+  TRUE,
+  FALSE,
+
+  // null values
+  NULL,
+  null,
+
+  // objects
+  new sample(),
+
+  // resource
+  $file_handle,
+
+  // undefined variable
+  @$undefined_var,
+
+  // unset variable
+  @$unset_var
+);
+
+// loop through with each element of the $inputs array to test curl_version() function
+$count = 1;
+foreach($inputs as $input) {
+  echo "-- Iteration $count --\n";
+  var_dump( is_array(curl_version($input)) );
+  $count ++;
+}
+
+fclose($file_handle);  //closing the file handle
+
+?>
+===Done===
+--EXPECTF--
+*** Testing curl_version() function: with unexpected inputs for 'age' argument ***
+-- Iteration 1 --
+bool(true)
+-- Iteration 2 --
+bool(true)
+-- Iteration 3 --
+bool(true)
+-- Iteration 4 --
+bool(true)
+-- Iteration 5 --
+bool(true)
+-- Iteration 6 --
+bool(true)
+-- Iteration 7 --
+bool(true)
+-- Iteration 8 --
+bool(true)
+-- Iteration 9 --
+bool(true)
+-- Iteration 10 --
+
+Warning: curl_version() expects parameter 1 to be long, array given in %s on line %d
+bool(false)
+-- Iteration 11 --
+
+Warning: curl_version() expects parameter 1 to be long, array given in %s on line %d
+bool(false)
+-- Iteration 12 --
+
+Warning: curl_version() expects parameter 1 to be long, array given in %s on line %d
+bool(false)
+-- Iteration 13 --
+
+Warning: curl_version() expects parameter 1 to be long, string given in %s on line %d
+bool(false)
+-- Iteration 14 --
+
+Warning: curl_version() expects parameter 1 to be long, string given in %s on line %d
+bool(false)
+-- Iteration 15 --
+
+Notice: A non well formed numeric value encountered in %s on line %d
+bool(true)
+-- Iteration 16 --
+bool(true)
+-- Iteration 17 --
+bool(true)
+-- Iteration 18 --
+bool(true)
+-- Iteration 19 --
+bool(true)
+-- Iteration 20 --
+bool(true)
+-- Iteration 21 --
+bool(true)
+-- Iteration 22 --
+
+Warning: curl_version() expects parameter 1 to be long, object given in %s on line %d
+bool(false)
+-- Iteration 23 --
+
+Warning: curl_version() expects parameter 1 to be long, resource given in %s on line %d
+bool(false)
+-- Iteration 24 --
+bool(true)
+-- Iteration 25 --
+bool(true)
+===Done===