These are not available in 32bit pack: q, Q, J, P (#4644)

Author: divinity76

reference/misc/functions/pack.xml

@@ -254,6 +254,9 @@ $binarydata = pack("nvc*", 0x1234, 0x5678, 65, 66);
 
  <refsect1 role="notes">
   &reftitle.notes;
+  <caution>
+    <simpara>Format codes <literal>q</literal>, <literal>Q</literal>, <literal>J</literal> and <literal>P</literal> are not available on 32-bit PHP builds.</simpara>
+  </caution>
   <caution>
    <para>Note that PHP internally stores <type>int</type> values as
     signed values of a machine-dependent size.