fix(ldapselectfield): compatibility with PHP 8

Signed-off-by: Thierry Bugier <tbugier@teclib.com>

Author: btry

inc/field/ldapselectfield.class.php

@@ -144,8 +144,25 @@ public function getAvailableValues() {
          $id = 0;
          do {
             if (AuthLDAP::isLdapPageSizeAvailable($config_ldap)) {
-               // phpcs:ignore Generic.PHP.DeprecatedFunctions
-               ldap_control_paged_result($ds, $config_ldap->fields['pagesize'], true, $cookie);
+               if (version_compare(PHP_VERSION, '7.3') < 0) {
+                  // phpcs:ignore Generic.PHP.DeprecatedFunctions
+                  ldap_control_paged_result($ds, $config_ldap->fields['pagesize'], true, $cookie);
+                  $result = ldap_search($ds, $config_ldap->fields['basedn'], $ldap_values->ldap_filter, $attribute);
+               } else {
+                  $controls = [
+                     [
+                        'oid'       =>LDAP_CONTROL_PAGEDRESULTS,
+                        'iscritical' => true,
+                        'value'     => [
+                           'size'   => $config_ldap->fields['pagesize'],
+                           'cookie' => $cookie
+                        ]
+                     ]
+                  ];
+                  $result = ldap_search($ds, $config_ldap->fields['basedn'], $ldap_values->ldap_filter, $attribute, 0, -1, -1, LDAP_DEREF_NEVER, $controls);
+                  ldap_parse_result($ds, $result, $errcode, $matcheddn, $errmsg, $referrals, $controls);
+                  $cookie = $controls[LDAP_CONTROL_PAGEDRESULTS]['value']['cookie'] ?? '';
+               }
             }
 
             $result  = ldap_search($ds, $config_ldap->fields['basedn'], $ldap_values->ldap_filter, $attribute);
@@ -160,7 +177,7 @@ public function getAvailableValues() {
                $id++;
             }
 
-            if (AuthLDAP::isLdapPageSizeAvailable($config_ldap)) {
+            if (AuthLDAP::isLdapPageSizeAvailable($config_ldap) && version_compare(PHP_VERSION, '7.3') < 0) {
                // phpcs:ignore Generic.PHP.DeprecatedFunctions
                ldap_control_paged_result_response($ds, $result, $cookie);
             }
@@ -235,11 +252,29 @@ public function prepareQuestionInputForSave($input) {
       set_error_handler('plugin_formcreator_ldap_warning_handler', E_WARNING);
 
       try {
-         $ds            = $config_ldap->connect();
+         $cookie = '';
+         $ds     = $config_ldap->connect();
          ldap_set_option($ds, LDAP_OPT_PROTOCOL_VERSION, 3);
-         // phpcs:ignore Generic.PHP.DeprecatedFunctions
-         ldap_control_paged_result($ds, 1);
-         $sn            = ldap_search($ds, $config_ldap->fields['basedn'], $input['ldap_filter'], $attribute);
+         if (version_compare(PHP_VERSION, '7.3') < 0) {
+            // phpcs:ignore Generic.PHP.DeprecatedFunctions
+            ldap_control_paged_result($ds, 1);
+            $sn            = ldap_search($ds, $config_ldap->fields['basedn'], $input['ldap_filter'], $attribute);
+         } else {
+            //since PHP 7.3, send serverctrls to ldap_search
+            $controls = [
+               [
+                  'oid'       =>LDAP_CONTROL_PAGEDRESULTS,
+                  'iscritical' => true,
+                  'value'     => [
+                     'size'   => $config_ldap->fields['pagesize'],
+                     'cookie' => $cookie
+                  ]
+               ]
+            ];
+            $sn = @ldap_search($ds, $config_ldap->fields['basedn'], $input['ldap_filter'], $attribute);
+            ldap_parse_result($ds, $sn, $errcode, $matcheddn, $errmsg, $referrals, $controls);
+            $cookie = $controls[LDAP_CONTROL_PAGEDRESULTS]['value']['cookie'] ?? '';
+         }
          ldap_get_entries($ds, $sn);
       } catch (Exception $e) {
          Session::addMessageAfterRedirect(__('Cannot recover LDAP informations!', 'formcreator'), false, ERROR);