Fix phpGH-19021: deprecation for tidyOptIsReadOnly

The tidyOptGetCategory function (added in libtidy 5.4.0) if only useable if TidyInternalCategory (added in libtidy 5.6.0) is also present, so check for the latter instead.

close phpGH-19053

Author: arjendekorte

NEWS

@@ -17,6 +17,11 @@ PHP                                                                        NEWS
 - Standard:
   . Fixed bug GH-16649 (UAF during array_splice). (alexandre-daubois)
 
+- Tidy:
+  . Fixed GH-19021 build issue with libtidy in regard of tidyOptIsReadonly
+    deprecation and TidyInternalCategory being available later than
+    tidyOptGetCategory. (arjendekorte)
+
 28 Aug 2025, PHP 8.3.25
 
 - Core:

ext/tidy/config.m4

@@ -62,7 +62,9 @@ if test "$PHP_TIDY" != "no"; then
     AC_DEFINE(HAVE_TIDYRELEASEDATE,1,[ ])
   ], [], [])
 
-  PHP_CHECK_LIBRARY($TIDY_LIB_NAME,tidyOptGetCategory,
+  dnl The tidyOptGetCategory function (added in libtidy 5.4.0) if only useable
+  dnl if TidyInternalCategory (added in libtidy 5.6.0) is also present.
+  PHP_CHECK_LIBRARY($TIDY_LIB_NAME,TidyInternalCategory,
   [
     AC_DEFINE(HAVE_TIDYOPTGETCATEGORY,1,[ ])
   ], [], [])