diff --git a/Zend/tests/006.phpt b/Zend/tests/006.phpt
index ee6b56704020d..54eb6fb5209b8 100644
--- a/Zend/tests/006.phpt
+++ b/Zend/tests/006.phpt
@@ -24,6 +24,6 @@ int(0)
 int(-3)
 int(0)
 int(0)
-int(2)
+int(1)
 int(0)
 int(0)
diff --git a/Zend/zend_operators.c b/Zend/zend_operators.c
index 8a0cc8131be44..a35edc01501c0 100644
--- a/Zend/zend_operators.c
+++ b/Zend/zend_operators.c
@@ -2956,7 +2956,7 @@ ZEND_API int ZEND_FASTCALL zend_binary_strcmp(const char *s1, size_t len1, const
 	}
 	retval = memcmp(s1, s2, MIN(len1, len2));
 	if (!retval) {
-		return (int)(len1 - len2);
+		return ZEND_THREEWAY_COMPARE(len1, len2);
 	} else {
 		return retval;
 	}
@@ -2972,7 +2972,7 @@ ZEND_API int ZEND_FASTCALL zend_binary_strncmp(const char *s1, size_t len1, cons
 	}
 	retval = memcmp(s1, s2, MIN(length, MIN(len1, len2)));
 	if (!retval) {
-		return (int)(MIN(length, len1) - MIN(length, len2));
+		return ZEND_THREEWAY_COMPARE(MIN(length, len1), MIN(length, len2));
 	} else {
 		return retval;
 	}
@@ -2997,7 +2997,7 @@ ZEND_API int ZEND_FASTCALL zend_binary_strcasecmp(const char *s1, size_t len1, c
 		}
 	}
 
-	return (int)(len1 - len2);
+	return ZEND_THREEWAY_COMPARE(len1, len2);
 }
 /* }}} */
 
@@ -3018,7 +3018,7 @@ ZEND_API int ZEND_FASTCALL zend_binary_strncasecmp(const char *s1, size_t len1,
 		}
 	}
 
-	return (int)(MIN(length, len1) - MIN(length, len2));
+	return ZEND_THREEWAY_COMPARE(MIN(length, len1), MIN(length, len2));
 }
 /* }}} */
 
@@ -3040,7 +3040,7 @@ ZEND_API int ZEND_FASTCALL zend_binary_strcasecmp_l(const char *s1, size_t len1,
 		}
 	}
 
-	return (int)(len1 - len2);
+	return ZEND_THREEWAY_COMPARE(len1, len2);
 }
 /* }}} */
 
@@ -3061,7 +3061,7 @@ ZEND_API int ZEND_FASTCALL zend_binary_strncasecmp_l(const char *s1, size_t len1
 		}
 	}
 
-	return (int)(MIN(length, len1) - MIN(length, len2));
+	return ZEND_THREEWAY_COMPARE(MIN(length, len1), MIN(length, len2));
 }
 /* }}} */
 
diff --git a/Zend/zend_portability.h b/Zend/zend_portability.h
index 6ad9f1b1db2f9..328a53defb827 100644
--- a/Zend/zend_portability.h
+++ b/Zend/zend_portability.h
@@ -457,6 +457,12 @@ extern "C++" {
 #define ZEND_TRUTH(x)		((x) ? 1 : 0)
 #define ZEND_LOG_XOR(a, b)		(ZEND_TRUTH(a) ^ ZEND_TRUTH(b))
 
+/**
+ * Do a three-way comparison of two integers and returns -1, 0 or 1
+ * depending on whether #a is smaller, equal or larger than #b.
+ */
+#define ZEND_THREEWAY_COMPARE(a, b) ((a) == (b) ? 0 : ((a) < (b) ? -1 : 1))
+
 #define ZEND_MAX_RESERVED_RESOURCES	6
 
 /* excpt.h on Digital Unix 4.0 defines function_table */
diff --git a/ext/standard/tests/strings/bug40754.phpt b/ext/standard/tests/strings/bug40754.phpt
index c2a563a7fd97a..c5bdeec2d0c73 100644
--- a/ext/standard/tests/strings/bug40754.phpt
+++ b/ext/standard/tests/strings/bug40754.phpt
@@ -90,6 +90,6 @@ stripos(): Argument #3 ($offset) must be contained in argument #1 ($haystack)
 strrpos(): Argument #3 ($offset) must be contained in argument #1 ($haystack)
 strripos(): Argument #3 ($offset) must be contained in argument #1 ($haystack)
 strripos(): Argument #3 ($offset) must be contained in argument #1 ($haystack)
-int(2)
+int(1)
 string(8) "abcdeabc"
 string(0) ""
diff --git a/ext/standard/tests/strings/bug54454.phpt b/ext/standard/tests/strings/bug54454.phpt
index 88835c983bbee..783fe43c42fcd 100644
--- a/ext/standard/tests/strings/bug54454.phpt
+++ b/ext/standard/tests/strings/bug54454.phpt
@@ -5,4 +5,4 @@ Bug #54454 (substr_compare incorrectly reports equality in some cases)
 var_dump(substr_compare('/', '/asd', 0, 4));
 ?>
 --EXPECT--
-int(-3)
+int(-1)
diff --git a/ext/standard/tests/strings/strncasecmp_variation7.phpt b/ext/standard/tests/strings/strncasecmp_variation7.phpt
index ed9a89e25a360..bb6be7c2e2269 100644
--- a/ext/standard/tests/strings/strncasecmp_variation7.phpt
+++ b/ext/standard/tests/strings/strncasecmp_variation7.phpt
@@ -17,6 +17,6 @@ echo "*** Done ***\n";
 ?>
 --EXPECT--
 *** Test strncasecmp() function: with null terminated strings and binary inputs ***
-int(5)
+int(1)
 int(-119)
 *** Done ***
diff --git a/ext/standard/tests/strings/strncasecmp_variation9.phpt b/ext/standard/tests/strings/strncasecmp_variation9.phpt
index 72e8e1e443fdb..7b0c19d20bcc8 100644
--- a/ext/standard/tests/strings/strncasecmp_variation9.phpt
+++ b/ext/standard/tests/strings/strncasecmp_variation9.phpt
@@ -71,9 +71,9 @@ echo "*** Done ***\n";
 --EXPECT--
 *** Test strncasecmp() function: with here-doc strings ***
 int(0)
-int(63)
+int(1)
 int(0)
-int(83)
+int(1)
 int(0)
 int(-1)
 int(0)
diff --git a/ext/standard/tests/strings/strncmp_variation7.phpt b/ext/standard/tests/strings/strncmp_variation7.phpt
index 0bdc2c4a58b17..f7232613ab7da 100644
--- a/ext/standard/tests/strings/strncmp_variation7.phpt
+++ b/ext/standard/tests/strings/strncmp_variation7.phpt
@@ -15,5 +15,5 @@ echo "*** Done ***\n";
 ?>
 --EXPECT--
 *** Test strncmp() function: Checking with the null terminated strings ***
-int(5)
+int(1)
 *** Done ***