zend_ini: mark zend_ini_string{_ex} as returning a const char*

Author: Girgias

UPGRADING.INTERNALS

@@ -70,6 +70,8 @@ PHP 8.6 INTERNALS UPGRADE NOTES
     performed on the result.
   . The zend_dval_to_lval_cap() function no longer takes a second
     zend_string* parameter.
+  . The zend_ini_string{_ex} functions (and thus INI_STR() and INI_ORIG_STR()
+    macros) now return a const char* instead of a char*.
 
 ========================
 2. Build system changes

Zend/zend_ini.c

@@ -491,15 +491,15 @@ ZEND_API double zend_ini_double(const char *name, size_t name_length, int orig)
 }
 /* }}} */
 
-ZEND_API char *zend_ini_string_ex(const char *name, size_t name_length, int orig, bool *exists) /* {{{ */
+ZEND_API const char *zend_ini_string_ex(const char *name, size_t name_length, int orig, bool *exists) /* {{{ */
 {
 	zend_string *str = zend_ini_str_ex(name, name_length, orig, exists);
 
 	return str ? ZSTR_VAL(str) : NULL;
 }
 /* }}} */
 
-ZEND_API char *zend_ini_string(const char *name, size_t name_length, int orig) /* {{{ */
+ZEND_API const char *zend_ini_string(const char *name, size_t name_length, int orig) /* {{{ */
 {
 	zend_string *str = zend_ini_str(name, name_length, orig);
 

Zend/zend_ini.h

@@ -88,8 +88,8 @@ ZEND_API void display_ini_entries(zend_module_entry *module);
 
 ZEND_API zend_long zend_ini_long(const char *name, size_t name_length, int orig);
 ZEND_API double zend_ini_double(const char *name, size_t name_length, int orig);
-ZEND_API char *zend_ini_string(const char *name, size_t name_length, int orig);
-ZEND_API char *zend_ini_string_ex(const char *name, size_t name_length, int orig, bool *exists);
+ZEND_API const char *zend_ini_string(const char *name, size_t name_length, int orig);
+ZEND_API const char *zend_ini_string_ex(const char *name, size_t name_length, int orig, bool *exists);
 ZEND_API zend_string *zend_ini_str(const char *name, size_t name_length, bool orig);
 ZEND_API zend_string *zend_ini_str_ex(const char *name, size_t name_length, bool orig, bool *exists);
 ZEND_API zend_string *zend_ini_get_value(zend_string *name);