Whoever has hacked this function into ext/mysql, here's a "test" for it.

diff --git a/ext/mysql/tests/mysql_set_charset.phpt b/ext/mysql/tests/mysql_set_charset.phpt
new file mode 100644 (file)
index 0000000..8ccdbab
--- /dev/null
+++ b/ext/mysql/tests/mysql_set_charset.phpt
@@ -0,0 +1,58 @@
+--TEST--
+mysql_set_charset() - STUB, function usage not recommended
+--SKIPIF--
+<?php
+require_once('skipif.inc');
+if (!function_exists('mysql_set_charset'))
+       die("skip Function not available");
+?>
+--FILE--
+<?php
+include_once "connect.inc";
+
+$tmp    = NULL;
+$link   = NULL;
+
+if (!is_null($tmp = @mysql_set_charset()))
+       printf("[001] Expecting NULL got %s/%s\n", $tmp, gettype($tmp));
+
+if (false !== ($tmp = @mysql_set_charset($link)))
+       printf("[002] Expecting boolean/false got %s/%s\n", $tmp, gettype($tmp));
+
+if (false !== ($tmp = @mysql_set_charset(-1)))
+       printf("[003] Expecting boolean/false got %s/%s\n", $tmp, gettype($tmp));
+
+if (!is_null($tmp = @mysql_set_charset('somecharset', $link)))
+       printf("[004] Expecting NULL got %s/%s\n", $tmp, gettype($tmp));
+
+if (!$link = my_mysql_connect($host, $user, $passwd, $db, $port, $socket))
+       printf("[005] Cannot connect to the server using host=%s, user=%s, passwd=***, dbname=%s, port=%s, socket=%s\n",
+               $host, $user, $db, $port, $socket);
+
+/* unicode mode should throw a warning */
+$tmp = mysql_set_charset('uFt8', $link);
+
+if (ini_get('unicode.semantics'))
+       $expect = false;
+else
+       $expect = true;
+
+$charsets = array('latin1', 'latin2');
+foreach ($charsets as $k => $charset) {
+       if (!($res = mysql_query(sprintf('SHOW CHARACTER SET LIKE "%s"', $charset), $link)))
+               continue;
+       mysql_free_result($res);
+       if ($expect !== ($tmp = @mysql_set_charset($charset, $link)))
+               printf("[006] Expecting %s/%s got %s/%s\n",
+                       gettype($expect), $expect,
+                       gettype($tmp), $tmp);
+}
+
+mysql_close($link);
+print "done!";
+?>
+--EXPECTF--
+done!
+--UEXPECTF--
+Warning: mysql_set_charset(): Character set %s is not supported when running PHP with unicode.semantics=On. in %s on line %d
+done!
\ No newline at end of file