Use correct order of operations. Second of many fixes for bug #52550

ext/standard/string.c

@@ -1873,7 +1873,7 @@ PHP_FUNCTION(strrpos)
 		p = haystack + offset;
 		e = haystack + haystack_len - needle_len;
 	} else {
-		if (-offset > haystack_len || offset < -INT_MAX) {
+		if (offset < -INT_MAX || -offset > haystack_len) {
 			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Offset is greater than the length of haystack string");
 			RETURN_FALSE;
 		}
@@ -1951,7 +1951,7 @@ PHP_FUNCTION(strripos)
 			e = haystack + haystack_len - 1;
 		} else {
 			p = haystack;
-			if (-offset > haystack_len || offset < -INT_MAX) {
+			if (offset < -INT_MAX || -offset > haystack_len) {
 				php_error_docref(NULL TSRMLS_CC, E_WARNING, "Offset is greater than the length of haystack string");
 				RETURN_FALSE;
 			}
@@ -1983,7 +1983,7 @@ PHP_FUNCTION(strripos)
 		p = haystack_dup + offset;
 		e = haystack_dup + haystack_len - needle_len;
 	} else {
-		if (-offset > haystack_len || offset < -INT_MAX) {
+		if (offset < -INT_MAX || -offset > haystack_len) {
 			efree(needle_dup);
 			efree(haystack_dup);
 			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Offset is greater than the length of haystack string");