Index: sapi/cli/php_cli.c
===================================================================
--- sapi/cli/php_cli.c	(revision 312931)
+++ sapi/cli/php_cli.c	(working copy)
@@ -128,7 +128,11 @@
 	"max_execution_time=0\n"
 	"max_input_time=-1\n\0";
 
+const char STRICT_INI[] =
+	"display_errors=1\n"
+	"error_reporting=-1\n\0";
 
+
 const opt_struct OPTIONS[] = {
 	{'a', 0, "interactive"},
 	{'B', 1, "process-begin"},
@@ -153,6 +157,7 @@
 	{'S', 1, "server"},
 	{'t', 1, "docroot"},
 	{'w', 0, "strip"},
+	{'W', 0, "strict"},
 	{'?', 0, "usage"},/* help alias (both '?' and 'usage') */
 	{'v', 0, "version"},
 	{'z', 1, "zend-extension"},
@@ -526,6 +531,7 @@
 				"  -s               Output HTML syntax highlighted source.\n"
 				"  -v               Version number\n"
 				"  -w               Output source with stripped comments and whitespace.\n"
+				"  -W               Enable all error reporting levels.\n"
 				"  -z <file>        Load Zend extension <file>.\n"
 				"\n"
 				"  args...          Arguments passed to script. Use -- args when first argument\n"
@@ -1288,6 +1294,12 @@
 				}
 				break;
 			}
+			case 'W':
+				ini_entries = realloc(ini_entries, ini_entries_len + sizeof(STRICT_INI));
+				memcpy(ini_entries + ini_entries_len, STRICT_INI, sizeof(STRICT_INI));
+				ini_entries_len += sizeof(STRICT_INI);
+
+				break;
 #ifndef PHP_CLI_WIN32_NO_CONSOLE
 			case 'S':
 				sapi_module = &cli_server_sapi_module;
Index: sapi/cli/tests/023.phpt
===================================================================
--- sapi/cli/tests/023.phpt	(revision 0)
+++ sapi/cli/tests/023.phpt	(revision 0)
@@ -0,0 +1,20 @@
+--TEST--
+-W option
+--SKIPIF--
+<?php 
+include "skipif.inc"; 
+?>
+--FILE--
+<?php
+
+$php = getenv('TEST_PHP_EXECUTABLE');
+
+echo `$php -n -W -r "var_dump(ini_get('display_errors'));"`;
+echo `$php -n -W -r "var_dump(ini_get('error_reporting'));"`;
+
+echo "Done\n";
+?>
+--EXPECT--	
+string(1) "1"
+string(2) "-1"
+Done