Link with pcre2 library explicitly. Otherwise, the following error is shown at runtime.
dlopen failed: cannot locate symbol "pcre2_match_8" referenced by "$PREFIX/lib/php/pgsql.so"

--- a/ext/pgsql/config.m4
+++ b/ext/pgsql/config.m4
@@ -7,6 +7,8 @@
     the libpq paths.])])
 
 if test "$PHP_PGSQL" != "no"; then
+  PGSQL_SHARED_LIBADD=-lpcre2-8
+  PHP_SUBST(PGSQL_SHARED_LIBADD)
   PHP_SETUP_PGSQL([PGSQL_SHARED_LIBADD],,, [$PHP_PGSQL])
   PHP_SUBST([PGSQL_SHARED_LIBADD])