diff --git a/generated/datetime.php b/generated/datetime.php
index 0d997d4a..9927f06c 100644
--- a/generated/datetime.php
+++ b/generated/datetime.php
@@ -235,7 +235,17 @@ function date_sun_info(int $time, float $latitude, float $longitude): array
 function date_sunrise(int $timestamp, int $format = SUNFUNCS_RET_STRING, float $latitude = null, float $longitude = null, float $zenith = null, float $gmt_offset = 0)
 {
     error_clear_last();
-    $result = \date_sunrise($timestamp, $format, $latitude, $longitude, $zenith, $gmt_offset);
+    if ($gmt_offset !== 0) {
+        $result = \date_sunrise($timestamp, $format, $latitude, $longitude, $zenith, $gmt_offset);
+    } elseif ($zenith !== null) {
+        $result = \date_sunrise($timestamp, $format, $latitude, $longitude, $zenith);
+    } elseif ($longitude !== null) {
+        $result = \date_sunrise($timestamp, $format, $latitude, $longitude);
+    } elseif ($latitude !== null) {
+        $result = \date_sunrise($timestamp, $format, $latitude);
+    } else {
+        $result = \date_sunrise($timestamp, $format);
+    }
     if ($result === false) {
         throw DatetimeException::createFromPhpError();
     }
@@ -328,7 +338,17 @@ function date_sunrise(int $timestamp, int $format = SUNFUNCS_RET_STRING, float $
 function date_sunset(int $timestamp, int $format = SUNFUNCS_RET_STRING, float $latitude = null, float $longitude = null, float $zenith = null, float $gmt_offset = 0)
 {
     error_clear_last();
-    $result = \date_sunset($timestamp, $format, $latitude, $longitude, $zenith, $gmt_offset);
+    if ($gmt_offset !== 0) {
+        $result = \date_sunset($timestamp, $format, $latitude, $longitude, $zenith, $gmt_offset);
+    } elseif ($zenith !== null) {
+        $result = \date_sunset($timestamp, $format, $latitude, $longitude, $zenith);
+    } elseif ($longitude !== null) {
+        $result = \date_sunset($timestamp, $format, $latitude, $longitude);
+    } elseif ($latitude !== null) {
+        $result = \date_sunset($timestamp, $format, $latitude);
+    } else {
+        $result = \date_sunset($timestamp, $format);
+    }
     if ($result === false) {
         throw DatetimeException::createFromPhpError();
     }
@@ -380,7 +400,21 @@ function date_sunset(int $timestamp, int $format = SUNFUNCS_RET_STRING, float $l
 function mktime(int $hour = null, int $minute = null, int $second = null, int $month = null, int $day = null, int $year = null): int
 {
     error_clear_last();
-    $result = \mktime($hour, $minute, $second, $month, $day, $year);
+    if ($year !== null) {
+        $result = \mktime($hour, $minute, $second, $month, $day, $year);
+    } elseif ($day !== null) {
+        $result = \mktime($hour, $minute, $second, $month, $day);
+    } elseif ($month !== null) {
+        $result = \mktime($hour, $minute, $second, $month);
+    } elseif ($second !== null) {
+        $result = \mktime($hour, $minute, $second);
+    } elseif ($minute !== null) {
+        $result = \mktime($hour, $minute);
+    } elseif ($hour !== null) {
+        $result = \mktime($hour);
+    } else {
+        $result = \mktime();
+    }
     if ($result === false) {
         throw DatetimeException::createFromPhpError();
     }
@@ -489,7 +523,11 @@ function strptime(string $date, string $format): array
 function strtotime(string $time, int $now = null): int
 {
     error_clear_last();
-    $result = \strtotime($time, $now);
+    if ($now !== null) {
+        $result = \strtotime($time, $now);
+    } else {
+        $result = \strtotime($time);
+    }
     if ($result === false) {
         throw DatetimeException::createFromPhpError();
     }
diff --git a/generated/filesystem.php b/generated/filesystem.php
index d93af778..1250afde 100644
--- a/generated/filesystem.php
+++ b/generated/filesystem.php
@@ -1346,8 +1346,10 @@ function touch(string $filename, int $time = null, int $atime = null): void
     error_clear_last();
     if ($atime !== null) {
         $result = \touch($filename, $time, $atime);
-    } else {
+    } elseif ($time !== null) {
         $result = \touch($filename, $time);
+    } else {
+        $result = \touch($filename);
     }
     if ($result === false) {
         throw FilesystemException::createFromPhpError();
diff --git a/generated/functionsList.php b/generated/functionsList.php
index d5624bb2..1a19ca79 100644
--- a/generated/functionsList.php
+++ b/generated/functionsList.php
@@ -860,6 +860,7 @@
     'pspell_config_repl',
     'pspell_config_runtogether',
     'pspell_config_save_repl',
+    'pspell_new_config',
     'pspell_new',
     'pspell_save_wordlist',
     'pspell_store_replacement',
diff --git a/generated/ldap.php b/generated/ldap.php
index 9b641994..38adffb9 100644
--- a/generated/ldap.php
+++ b/generated/ldap.php
@@ -800,7 +800,21 @@ function ldap_get_values($link_identifier, $result_entry_identifier, string $att
 function ldap_list($link_identifier, string $base_dn, string $filter, array $attributes = null, int $attrsonly = 0, int $sizelimit = -1, int $timelimit = -1, int $deref = LDAP_DEREF_NEVER, array $serverctrls = null)
 {
     error_clear_last();
-    $result = \ldap_list($link_identifier, $base_dn, $filter, $attributes, $attrsonly, $sizelimit, $timelimit, $deref, $serverctrls);
+    if ($serverctrls !== null) {
+        $result = \ldap_list($link_identifier, $base_dn, $filter, $attributes, $attrsonly, $sizelimit, $timelimit, $deref, $serverctrls);
+    } elseif ($deref !== LDAP_DEREF_NEVER) {
+        $result = \ldap_list($link_identifier, $base_dn, $filter, $attributes, $attrsonly, $sizelimit, $timelimit, $deref);
+    } elseif ($timelimit !== -1) {
+        $result = \ldap_list($link_identifier, $base_dn, $filter, $attributes, $attrsonly, $sizelimit, $timelimit);
+    } elseif ($sizelimit !== -1) {
+        $result = \ldap_list($link_identifier, $base_dn, $filter, $attributes, $attrsonly, $sizelimit);
+    } elseif ($attrsonly !== 0) {
+        $result = \ldap_list($link_identifier, $base_dn, $filter, $attributes, $attrsonly);
+    } elseif ($attributes !== null) {
+        $result = \ldap_list($link_identifier, $base_dn, $filter, $attributes);
+    } else {
+        $result = \ldap_list($link_identifier, $base_dn, $filter);
+    }
     if ($result === false) {
         throw LdapException::createFromPhpError();
     }
@@ -1181,7 +1195,21 @@ function ldap_parse_result($link, $result, int &$errcode, string &$matcheddn = n
 function ldap_read($link_identifier, string $base_dn, string $filter, array $attributes = null, int $attrsonly = 0, int $sizelimit = -1, int $timelimit = -1, int $deref = LDAP_DEREF_NEVER, array $serverctrls = null)
 {
     error_clear_last();
-    $result = \ldap_read($link_identifier, $base_dn, $filter, $attributes, $attrsonly, $sizelimit, $timelimit, $deref, $serverctrls);
+    if ($serverctrls !== null) {
+        $result = \ldap_read($link_identifier, $base_dn, $filter, $attributes, $attrsonly, $sizelimit, $timelimit, $deref, $serverctrls);
+    } elseif ($deref !== LDAP_DEREF_NEVER) {
+        $result = \ldap_read($link_identifier, $base_dn, $filter, $attributes, $attrsonly, $sizelimit, $timelimit, $deref);
+    } elseif ($timelimit !== -1) {
+        $result = \ldap_read($link_identifier, $base_dn, $filter, $attributes, $attrsonly, $sizelimit, $timelimit);
+    } elseif ($sizelimit !== -1) {
+        $result = \ldap_read($link_identifier, $base_dn, $filter, $attributes, $attrsonly, $sizelimit);
+    } elseif ($attrsonly !== 0) {
+        $result = \ldap_read($link_identifier, $base_dn, $filter, $attributes, $attrsonly);
+    } elseif ($attributes !== null) {
+        $result = \ldap_read($link_identifier, $base_dn, $filter, $attributes);
+    } else {
+        $result = \ldap_read($link_identifier, $base_dn, $filter);
+    }
     if ($result === false) {
         throw LdapException::createFromPhpError();
     }
@@ -1349,7 +1377,21 @@ function ldap_sasl_bind($link, string $binddn = null, string $password = null, s
 function ldap_search($link_identifier, string $base_dn, string $filter, array $attributes = null, int $attrsonly = 0, int $sizelimit = -1, int $timelimit = -1, int $deref = LDAP_DEREF_NEVER, array $serverctrls = null)
 {
     error_clear_last();
-    $result = \ldap_search($link_identifier, $base_dn, $filter, $attributes, $attrsonly, $sizelimit, $timelimit, $deref, $serverctrls);
+    if ($serverctrls !== null) {
+        $result = \ldap_search($link_identifier, $base_dn, $filter, $attributes, $attrsonly, $sizelimit, $timelimit, $deref, $serverctrls);
+    } elseif ($deref !== LDAP_DEREF_NEVER) {
+        $result = \ldap_search($link_identifier, $base_dn, $filter, $attributes, $attrsonly, $sizelimit, $timelimit, $deref);
+    } elseif ($timelimit !== -1) {
+        $result = \ldap_search($link_identifier, $base_dn, $filter, $attributes, $attrsonly, $sizelimit, $timelimit);
+    } elseif ($sizelimit !== -1) {
+        $result = \ldap_search($link_identifier, $base_dn, $filter, $attributes, $attrsonly, $sizelimit);
+    } elseif ($attrsonly !== 0) {
+        $result = \ldap_search($link_identifier, $base_dn, $filter, $attributes, $attrsonly);
+    } elseif ($attributes !== null) {
+        $result = \ldap_search($link_identifier, $base_dn, $filter, $attributes);
+    } else {
+        $result = \ldap_search($link_identifier, $base_dn, $filter);
+    }
     if ($result === false) {
         throw LdapException::createFromPhpError();
     }
diff --git a/generated/mbstring.php b/generated/mbstring.php
index 0a66fe93..4530b070 100644
--- a/generated/mbstring.php
+++ b/generated/mbstring.php
@@ -17,7 +17,11 @@
 function mb_check_encoding(string $var = null, string $encoding = null): void
 {
     error_clear_last();
-    $result = \mb_check_encoding($var, $encoding);
+    if ($encoding !== null) {
+        $result = \mb_check_encoding($var, $encoding);
+    } else {
+        $result = \mb_check_encoding($var);
+    }
     if ($result === false) {
         throw MbstringException::createFromPhpError();
     }
@@ -80,7 +84,11 @@ function mb_chr(int $cp, string $encoding = null): string
 function mb_detect_order($encoding_list = null)
 {
     error_clear_last();
-    $result = \mb_detect_order($encoding_list);
+    if ($encoding_list !== null) {
+        $result = \mb_detect_order($encoding_list);
+    } else {
+        $result = \mb_detect_order();
+    }
     if ($result === false) {
         throw MbstringException::createFromPhpError();
     }
@@ -309,7 +317,11 @@ function mb_eregi_replace(string $pattern, string $replace, string $string, stri
 function mb_http_output(string $encoding = null)
 {
     error_clear_last();
-    $result = \mb_http_output($encoding);
+    if ($encoding !== null) {
+        $result = \mb_http_output($encoding);
+    } else {
+        $result = \mb_http_output();
+    }
     if ($result === false) {
         throw MbstringException::createFromPhpError();
     }
@@ -336,7 +348,11 @@ function mb_http_output(string $encoding = null)
 function mb_internal_encoding(string $encoding = null)
 {
     error_clear_last();
-    $result = \mb_internal_encoding($encoding);
+    if ($encoding !== null) {
+        $result = \mb_internal_encoding($encoding);
+    } else {
+        $result = \mb_internal_encoding();
+    }
     if ($result === false) {
         throw MbstringException::createFromPhpError();
     }
@@ -404,7 +420,11 @@ function mb_parse_str(string $encoded_string, array &$result = null): void
 function mb_regex_encoding(string $encoding = null)
 {
     error_clear_last();
-    $result = \mb_regex_encoding($encoding);
+    if ($encoding !== null) {
+        $result = \mb_regex_encoding($encoding);
+    } else {
+        $result = \mb_regex_encoding();
+    }
     if ($result === false) {
         throw MbstringException::createFromPhpError();
     }
diff --git a/generated/mysql.php b/generated/mysql.php
index eda4d388..c73ab4ee 100644
--- a/generated/mysql.php
+++ b/generated/mysql.php
@@ -76,7 +76,19 @@ function mysql_close($link_identifier = null): void
 function mysql_connect(string $server = null, string $username = null, string $password = null, bool $new_link = false, int $client_flags = 0)
 {
     error_clear_last();
-    $result = \mysql_connect($server, $username, $password, $new_link, $client_flags);
+    if ($client_flags !== 0) {
+        $result = \mysql_connect($server, $username, $password, $new_link, $client_flags);
+    } elseif ($new_link !== false) {
+        $result = \mysql_connect($server, $username, $password, $new_link);
+    } elseif ($password !== null) {
+        $result = \mysql_connect($server, $username, $password);
+    } elseif ($username !== null) {
+        $result = \mysql_connect($server, $username);
+    } elseif ($server !== null) {
+        $result = \mysql_connect($server);
+    } else {
+        $result = \mysql_connect();
+    }
     if ($result === false) {
         throw MysqlException::createFromPhpError();
     }
diff --git a/generated/network.php b/generated/network.php
index 95356800..8da5fdff 100644
--- a/generated/network.php
+++ b/generated/network.php
@@ -304,7 +304,11 @@ function dns_get_record(string $hostname, int $type = DNS_ANY, array &$authns =
 function fsockopen(string $hostname, int $port = -1, int &$errno = null, string &$errstr = null, float $timeout = null)
 {
     error_clear_last();
-    $result = \fsockopen($hostname, $port, $errno, $errstr, $timeout);
+    if ($timeout !== null) {
+        $result = \fsockopen($hostname, $port, $errno, $errstr, $timeout);
+    } else {
+        $result = \fsockopen($hostname, $port, $errno, $errstr);
+    }
     if ($result === false) {
         throw NetworkException::createFromPhpError();
     }
diff --git a/generated/pcntl.php b/generated/pcntl.php
index 0bac61b4..784ab6f9 100644
--- a/generated/pcntl.php
+++ b/generated/pcntl.php
@@ -54,7 +54,13 @@ function pcntl_exec(string $path, array $args = null, array $envs = null): void
 function pcntl_getpriority(int $pid = null, int $process_identifier = PRIO_PROCESS): int
 {
     error_clear_last();
-    $result = \pcntl_getpriority($pid, $process_identifier);
+    if ($process_identifier !== PRIO_PROCESS) {
+        $result = \pcntl_getpriority($pid, $process_identifier);
+    } elseif ($pid !== null) {
+        $result = \pcntl_getpriority($pid);
+    } else {
+        $result = \pcntl_getpriority();
+    }
     if ($result === false) {
         throw PcntlException::createFromPhpError();
     }
@@ -81,7 +87,13 @@ function pcntl_getpriority(int $pid = null, int $process_identifier = PRIO_PROCE
 function pcntl_setpriority(int $priority, int $pid = null, int $process_identifier = PRIO_PROCESS): void
 {
     error_clear_last();
-    $result = \pcntl_setpriority($priority, $pid, $process_identifier);
+    if ($process_identifier !== PRIO_PROCESS) {
+        $result = \pcntl_setpriority($priority, $pid, $process_identifier);
+    } elseif ($pid !== null) {
+        $result = \pcntl_setpriority($priority, $pid);
+    } else {
+        $result = \pcntl_setpriority($priority);
+    }
     if ($result === false) {
         throw PcntlException::createFromPhpError();
     }
diff --git a/generated/pspell.php b/generated/pspell.php
index ae6f028b..76b1add7 100644
--- a/generated/pspell.php
+++ b/generated/pspell.php
@@ -310,6 +310,26 @@ function pspell_config_save_repl(int $dictionary_link, bool $flag): void
 }
 
 
+/**
+ *
+ *
+ * @param int $config The config parameter is the one returned by
+ * pspell_config_create when the config was created.
+ * @return int Returns a dictionary link identifier on success,  .
+ * @throws PspellException
+ *
+ */
+function pspell_new_config(int $config): int
+{
+    error_clear_last();
+    $result = \pspell_new_config($config);
+    if ($result === false) {
+        throw PspellException::createFromPhpError();
+    }
+    return $result;
+}
+
+
 /**
  * pspell_new opens up a new dictionary and
  * returns the dictionary link identifier for use in other pspell
diff --git a/generated/stream.php b/generated/stream.php
index 4d044104..eea73b9d 100644
--- a/generated/stream.php
+++ b/generated/stream.php
@@ -334,7 +334,13 @@ function stream_set_timeout($stream, int $seconds, int $microseconds = 0): void
 function stream_socket_accept($server_socket, float $timeout = null, string &$peername = null)
 {
     error_clear_last();
-    $result = \stream_socket_accept($server_socket, $timeout, $peername);
+    if ($peername !== null) {
+        $result = \stream_socket_accept($server_socket, $timeout, $peername);
+    } elseif ($timeout !== null) {
+        $result = \stream_socket_accept($server_socket, $timeout);
+    } else {
+        $result = \stream_socket_accept($server_socket);
+    }
     if ($result === false) {
         throw StreamException::createFromPhpError();
     }
@@ -396,8 +402,12 @@ function stream_socket_client(string $remote_socket, int &$errno = null, string
     error_clear_last();
     if ($context !== null) {
         $result = \stream_socket_client($remote_socket, $errno, $errstr, $timeout, $flags, $context);
-    } else {
+    } elseif ($flags !== STREAM_CLIENT_CONNECT) {
         $result = \stream_socket_client($remote_socket, $errno, $errstr, $timeout, $flags);
+    } elseif ($timeout !== null) {
+        $result = \stream_socket_client($remote_socket, $errno, $errstr, $timeout);
+    } else {
+        $result = \stream_socket_client($remote_socket, $errno, $errstr);
     }
     if ($result === false) {
         throw StreamException::createFromPhpError();
diff --git a/generator/src/Parameter.php b/generator/src/Parameter.php
index 171eb8de..06095b4e 100644
--- a/generator/src/Parameter.php
+++ b/generator/src/Parameter.php
@@ -76,7 +76,19 @@ public function isByReference(): bool
      */
     public function isOptionalWithNoDefault(): bool
     {
-        return ((string)$this->parameter['choice']) === 'opt' && !$this->hasDefaultValue();
+        if (((string)$this->parameter['choice']) !== 'opt') {
+            return false;
+        }
+        if (!$this->hasDefaultValue()) {
+            return true;
+        }
+
+        $initializer = $this->getInitializer();
+        // Some default value have weird values. For instance, first parameter of "mb_internal_encoding" has default value "mb_internal_encoding()"
+        if ($initializer !== 'array()' && strpos($initializer, '(') !== false) {
+            return true;
+        }
+        return false;
     }
 
     public function isVariadic(): bool
diff --git a/generator/tests/GeneratedFilesTest.php b/generator/tests/GeneratedFilesTest.php
index 7dcdbc9f..5c85d1f7 100644
--- a/generator/tests/GeneratedFilesTest.php
+++ b/generator/tests/GeneratedFilesTest.php
@@ -88,4 +88,18 @@ public function testPregSplit()
         $keywords = preg_split("/[\s,]+/", "hypertext language, programming", null);
         $this->assertSame(['hypertext', 'language', 'programming'], $keywords);
     }
+
+
+    /**
+     * Tests that parameters with "time()" default value are correctly handled.
+     */
+    public function testStrtotime()
+    {
+        require_once __DIR__.'/../../generated/datetime.php';
+        require_once __DIR__.'/../../lib/Exceptions/SafeExceptionInterface.php';
+        require_once __DIR__.'/../../lib/Exceptions/AbstractSafeException.php';
+        require_once __DIR__.'/../../generated/Exceptions/DatetimeException.php';
+
+        $this->assertSame(\strtotime('+1 day'), strtotime('+1 day'));
+    }
 }
diff --git a/rector-migrate.yml b/rector-migrate.yml
index c9834200..05c62fb5 100644
--- a/rector-migrate.yml
+++ b/rector-migrate.yml
@@ -861,6 +861,7 @@ services:
       pspell_config_repl: 'Safe\pspell_config_repl'
       pspell_config_runtogether: 'Safe\pspell_config_runtogether'
       pspell_config_save_repl: 'Safe\pspell_config_save_repl'
+      pspell_new_config: 'Safe\pspell_new_config'
       pspell_new: 'Safe\pspell_new'
       pspell_save_wordlist: 'Safe\pspell_save_wordlist'
       pspell_store_replacement: 'Safe\pspell_store_replacement'