functions that were checked for are present since PHP 5.4, supported is >=/

* so the check from older days is really not necessary anymore
* resolves #10923

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>

apps/user_ldap/lib/Access.php

@@ -1855,15 +1855,15 @@ class Access extends LDAPUtility implements IUserTools {
 
 	/**
 	 * resets a running Paged Search operation
+	 *
+	 * @throws ServerNotAvailableException
 	 */
 	private function abandonPagedSearch() {
-		if($this->connection->hasPagedResultSupport) {
-			$cr = $this->connection->getConnectionResource();
-			$this->invokeLDAPMethod('controlPagedResult', $cr, 0, false, $this->lastCookie);
-			$this->getPagedSearchResultState();
-			$this->lastCookie = '';
-			$this->cookies = array();
-		}
+		$cr = $this->connection->getConnectionResource();
+		$this->invokeLDAPMethod('controlPagedResult', $cr, 0, false, $this->lastCookie);
+		$this->getPagedSearchResultState();
+		$this->lastCookie = '';
+		$this->cookies = [];
 	}
 
 	/**
@@ -1902,10 +1902,6 @@ class Access extends LDAPUtility implements IUserTools {
 	 * @return bool
 	 */
 	public function hasMoreResults() {
-		if(!$this->connection->hasPagedResultSupport) {
-			return false;
-		}
-
 		if(empty($this->lastCookie) && $this->lastCookie !== '0') {
 			// as in RFC 2696, when all results are returned, the cookie will
 			// be empty.
@@ -1954,7 +1950,7 @@ class Access extends LDAPUtility implements IUserTools {
 	 */
 	private function initPagedSearch($filter, $bases, $attr, $limit, $offset) {
 		$pagedSearchOK = false;
-		if($this->connection->hasPagedResultSupport && ($limit !== 0)) {
+		if ($limit !== 0) {
 			$offset = (int)$offset; //can be null
 			\OCP\Util::writeLog('user_ldap',
 				'initializing paged search for  Filter '.$filter.' base '.print_r($bases, true)
@@ -2000,7 +1996,7 @@ class Access extends LDAPUtility implements IUserTools {
 		 * So we added "&& !empty($this->lastCookie)" to this test to ignore pagination
 		 * if we don't have a previous paged search.
 		 */
-		} else if($this->connection->hasPagedResultSupport && $limit === 0 && !empty($this->lastCookie)) {
+		} else if ($limit === 0 && !empty($this->lastCookie)) {
 			// a search without limit was requested. However, if we do use
 			// Paged Search once, we always must do it. This requires us to
 			// initialize it with the configured page size.

apps/user_ldap/lib/Configuration.php

@@ -95,7 +95,6 @@ class Configuration {
 		'ldapAttributesForGroupSearch' => null,
 		'ldapExperiencedAdmin' => false,
 		'homeFolderNamingRule' => null,
-		'hasPagedResultSupport' => false,
 		'hasMemberOfFilterSupport' => false,
 		'useMemberOfToDetectMembership' => true,
 		'ldapExpertUsernameAttr' => null,
@@ -278,7 +277,6 @@ class Configuration {
 					break;
 				//following options are not stored but detected, skip them
 				case 'ldapIgnoreNamingRules':
-				case 'hasPagedResultSupport':
 				case 'ldapUuidUserAttribute':
 				case 'ldapUuidGroupAttribute':
 					continue 2;

apps/user_ldap/lib/Connection.php

@@ -50,7 +50,6 @@ use OCP\ILogger;
  * @property string ldapUserDisplayName2
  * @property string ldapUserAvatarRule
  * @property boolean turnOnPasswordChange
- * @property boolean hasPagedResultSupport
  * @property string[] ldapBaseUsers
  * @property int|null ldapPagingSize holds an integer
  * @property bool|mixed|void ldapGroupMemberAssocAttr
@@ -67,7 +66,6 @@ class Connection extends LDAPUtility {
 	private $configPrefix;
 	private $configID;
 	private $configured = false;
-	private $hasPagedResultSupport = true;
 	//whether connection should be kept on __destruct
 	private $dontDestruct = false;
 
@@ -112,9 +110,6 @@ class Connection extends LDAPUtility {
 		$helper = new Helper(\OC::$server->getConfig());
 		$this->doNotValidate = !in_array($this->configPrefix,
 			$helper->getServerConfigurationPrefixes());
-		$this->hasPagedResultSupport =
-			(int)$this->configuration->ldapPagingSize !== 0
-			|| $this->ldap->hasPagedResultSupport();
 	}
 
 	public function __destruct() {
@@ -146,10 +141,6 @@ class Connection extends LDAPUtility {
 			$this->readConfiguration();
 		}
 
-		if($name === 'hasPagedResultSupport') {
-			return $this->hasPagedResultSupport;
-		}
-
 		return $this->configuration->$name;
 	}
 

apps/user_ldap/lib/Controller/ConfigAPIController.php

@@ -260,7 +260,6 @@ class ConfigAPIController extends OCSController {
 	 *     <ldapAttributesForGroupSearch></ldapAttributesForGroupSearch>
 	 *     <ldapExperiencedAdmin>0</ldapExperiencedAdmin>
 	 *     <homeFolderNamingRule></homeFolderNamingRule>
-	 *     <hasPagedResultSupport></hasPagedResultSupport>
 	 *     <hasMemberOfFilterSupport></hasMemberOfFilterSupport>
 	 *     <useMemberOfToDetectMembership>1</useMemberOfToDetectMembership>
 	 *     <ldapExpertUsernameAttr>uid</ldapExpertUsernameAttr>

apps/user_ldap/lib/Group_LDAP.php

@@ -1007,7 +1007,7 @@ class Group_LDAP extends BackendUtility implements \OCP\GroupInterface, IGroupLD
 		}
 		$search = $this->access->escapeFilterPart($search, true);
 		$pagingSize = (int)$this->access->connection->ldapPagingSize;
-		if (!$this->access->connection->hasPagedResultSupport || $pagingSize <= 0) {
+		if ($pagingSize <= 0) {
 			return $this->getGroupsChunk($search, $limit, $offset);
 		}
 		$maxGroups = 100000; // limit max results (just for safety reasons)

apps/user_ldap/lib/ILDAPWrapper.php

@@ -206,12 +206,6 @@ interface ILDAPWrapper {
 	 * */
 	public function areLDAPFunctionsAvailable();
 
-	/**
-	 * Checks whether PHP supports LDAP Paged Results
-	 * @return bool true if it the case, false otherwise
-	 * */
-	public function hasPagedResultSupport();
-
 	/**
 	 * Checks whether the submitted parameter is a resource
 	 * @param resource $resource the resource variable to check

apps/user_ldap/lib/LDAP.php

@@ -238,16 +238,6 @@ class LDAP implements ILDAPWrapper {
 		return function_exists('ldap_connect');
 	}
 
-	/**
-	 * Checks whether PHP supports LDAP Paged Results
-	 * @return boolean if it the case, false otherwise
-	 * */
-	public function hasPagedResultSupport() {
-		$hasSupport = function_exists('ldap_control_paged_result')
-			&& function_exists('ldap_control_paged_result_response');
-		return $hasSupport;
-	}
-
 	/**
 	 * Checks whether the submitted parameter is a resource
 	 * @param Resource $resource the resource variable to check