From 537ae4f990d35ff6d54d7af31b1d2cfa064c021c Mon Sep 17 00:00:00 2001
From: Saki Takamachi <34942839+SakiTakamachi@users.noreply.github.com>
Date: Tue, 24 Jun 2025 20:40:09 +0900
Subject: [PATCH] removed `ZEND_IS_XDIGIT()` (#18926)

---
 UPGRADING.INTERNALS   | 2 ++
 Zend/zend_operators.h | 1 -
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/UPGRADING.INTERNALS b/UPGRADING.INTERNALS
index f421242dba6..acc9612b72e 100644
--- a/UPGRADING.INTERNALS
+++ b/UPGRADING.INTERNALS
@@ -43,6 +43,8 @@ PHP 8.5 INTERNALS UPGRADE NOTES
   . Added the zend_update_exception_properties() function for instantiating
     Exception child classes. It updates the $message, $code, and $previous
     properties.
+  . ZEND_IS_XDIGIT() macro was removed because it was unused and its name
+    did not match its actual behavior.
 
 ========================
 2. Build system changes
diff --git a/Zend/zend_operators.h b/Zend/zend_operators.h
index db86345b699..a7537d1b3ef 100644
--- a/Zend/zend_operators.h
+++ b/Zend/zend_operators.h
@@ -156,7 +156,6 @@ static zend_always_inline zend_long zend_dval_to_lval_safe(double d)
 }
 
 #define ZEND_IS_DIGIT(c) ((c) >= '0' && (c) <= '9')
-#define ZEND_IS_XDIGIT(c) (((c) >= 'A' && (c) <= 'F') || ((c) >= 'a' && (c) <= 'f'))
 
 static zend_always_inline uint8_t is_numeric_string_ex(const char *str, size_t length, zend_long *lval,
 	double *dval, bool allow_errors, int *oflow_info, bool *trailing_data)