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 809
 810     <li class="md-nav__item">
 811       <a href="../../javascript/new-api_ui/" class="md-nav__link">
 812         User Interface
 813       </a>
 814     </li>
 815
 816
 817
 818         </ul>
 819       </nav>
 820     </li>
 821
 822
 823
 824
 825
 826
 827
 828     <li class="md-nav__item">
 829       <a href="../../javascript/legacy-api/" class="md-nav__link">
 830         Legacy API
 831       </a>
 832     </li>
 833
 834
 835
 836
 837
 838
 839
 840     <li class="md-nav__item">
 841       <a href="../../javascript/helper-functions/" class="md-nav__link">
 842         Helper Functions
 843       </a>
 844     </li>
 845
 846
 847
 848
 849
 850
 851
 852     <li class="md-nav__item">
 853       <a href="../../javascript/code-snippets/" class="md-nav__link">
 854         Code Snippets
 855       </a>
 856     </li>
 857
 858
 859
 860         </ul>
 861       </nav>
 862     </li>
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874     <li class="md-nav__item md-nav__item--nested">
 875
 876
 877         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_5" type="checkbox" id="__nav_5" >
 878
 879       <label class="md-nav__link" for="__nav_5">
 880         Package Components
 881         <span class="md-nav__icon md-icon"></span>
 882       </label>
 883       <nav class="md-nav" aria-label="Package Components" data-md-level="1">
 884         <label class="md-nav__title" for="__nav_5">
 885           <span class="md-nav__icon md-icon"></span>
 886           Package Components
 887         </label>
 888         <ul class="md-nav__list" data-md-scrollfix>
 889
 890
 891
 892
 893
 894     <li class="md-nav__item">
 895       <a href="../../package/package-xml/" class="md-nav__link">
 896         package.xml
 897       </a>
 898     </li>
 899
 900
 901
 902
 903
 904
 905
 906
 907     <li class="md-nav__item md-nav__item--nested">
 908
 909
 910         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_5_2" type="checkbox" id="__nav_5_2" >
 911
 912       <label class="md-nav__link" for="__nav_5_2">
 913         PIPs
 914         <span class="md-nav__icon md-icon"></span>
 915       </label>
 916       <nav class="md-nav" aria-label="PIPs" data-md-level="2">
 917         <label class="md-nav__title" for="__nav_5_2">
 918           <span class="md-nav__icon md-icon"></span>
 919           PIPs
 920         </label>
 921         <ul class="md-nav__list" data-md-scrollfix>
 922
 923
 924
 925
 926
 927     <li class="md-nav__item">
 928       <a href="../../package/pip/" class="md-nav__link">
 929         Overview
 930       </a>
 931     </li>
 932
 933
 934
 935
 936
 937
 938
 939     <li class="md-nav__item">
 940       <a href="../../package/pip/acl-option/" class="md-nav__link">
 941         aclOption
 942       </a>
 943     </li>
 944
 945
 946
 947
 948
 949
 950
 951     <li class="md-nav__item">
 952       <a href="../../package/pip/acp-menu/" class="md-nav__link">
 953         acpMenu
 954       </a>
 955     </li>
 956
 957
 958
 959
 960
 961
 962
 963     <li class="md-nav__item">
 964       <a href="../../package/pip/acp-search-provider/" class="md-nav__link">
 965         acpSearchProvider
 966       </a>
 967     </li>
 968
 969
 970
 971
 972
 973
 974
 975     <li class="md-nav__item">
 976       <a href="../../package/pip/acp-template/" class="md-nav__link">
 977         acpTemplate
 978       </a>
 979     </li>
 980
 981
 982
 983
 984
 985
 986
 987     <li class="md-nav__item">
 988       <a href="../../package/pip/bbcode/" class="md-nav__link">
 989         bbcode
 990       </a>
 991     </li>
 992
 993
 994
 995
 996
 997
 998
 999     <li class="md-nav__item">
1000       <a href="../../package/pip/box/" class="md-nav__link">
1001         box
1002       </a>
1003     </li>
1004
1005
1006
1007
1008
1009
1010
1011     <li class="md-nav__item">
1012       <a href="../../package/pip/clipboard-action/" class="md-nav__link">
1013         clipboardAction
1014       </a>
1015     </li>
1016
1017
1018
1019
1020
1021
1022
1023     <li class="md-nav__item">
1024       <a href="../../package/pip/core-object/" class="md-nav__link">
1025         coreObject
1026       </a>
1027     </li>
1028
1029
1030
1031
1032
1033
1034
1035     <li class="md-nav__item">
1036       <a href="../../package/pip/cronjob/" class="md-nav__link">
1037         cronjob
1038       </a>
1039     </li>
1040
1041
1042
1043
1044
1045
1046
1047     <li class="md-nav__item">
1048       <a href="../../package/pip/event-listener/" class="md-nav__link">
1049         eventListener
1050       </a>
1051     </li>
1052
1053
1054
1055
1056
1057
1058
1059     <li class="md-nav__item">
1060       <a href="../../package/pip/file/" class="md-nav__link">
1061         file
1062       </a>
1063     </li>
1064
1065
1066
1067
1068
1069
1070
1071     <li class="md-nav__item">
1072       <a href="../../package/pip/language/" class="md-nav__link">
1073         language
1074       </a>
1075     </li>
1076
1077
1078
1079
1080
1081
1082
1083     <li class="md-nav__item">
1084       <a href="../../package/pip/media-provider/" class="md-nav__link">
1085         mediaProvider
1086       </a>
1087     </li>
1088
1089
1090
1091
1092
1093
1094
1095     <li class="md-nav__item">
1096       <a href="../../package/pip/menu/" class="md-nav__link">
1097         menu
1098       </a>
1099     </li>
1100
1101
1102
1103
1104
1105
1106
1107     <li class="md-nav__item">
1108       <a href="../../package/pip/menu-item/" class="md-nav__link">
1109         menuItem
1110       </a>
1111     </li>
1112
1113
1114
1115
1116
1117
1118
1119     <li class="md-nav__item">
1120       <a href="../../package/pip/object-type/" class="md-nav__link">
1121         objectType
1122       </a>
1123     </li>
1124
1125
1126
1127
1128
1129
1130
1131     <li class="md-nav__item">
1132       <a href="../../package/pip/object-type-definition/" class="md-nav__link">
1133         objectTypeDefinition
1134       </a>
1135     </li>
1136
1137
1138
1139
1140
1141
1142
1143     <li class="md-nav__item">
1144       <a href="../../package/pip/option/" class="md-nav__link">
1145         option
1146       </a>
1147     </li>
1148
1149
1150
1151
1152
1153
1154
1155     <li class="md-nav__item">
1156       <a href="../../package/pip/page/" class="md-nav__link">
1157         page
1158       </a>
1159     </li>
1160
1161
1162
1163
1164
1165
1166
1167     <li class="md-nav__item">
1168       <a href="../../package/pip/pip/" class="md-nav__link">
1169         pip
1170       </a>
1171     </li>
1172
1173
1174
1175
1176
1177
1178
1179     <li class="md-nav__item">
1180       <a href="../../package/pip/script/" class="md-nav__link">
1181         script
1182       </a>
1183     </li>
1184
1185
1186
1187
1188
1189
1190
1191     <li class="md-nav__item">
1192       <a href="../../package/pip/smiley/" class="md-nav__link">
1193         smiley
1194       </a>
1195     </li>
1196
1197
1198
1199
1200
1201
1202
1203     <li class="md-nav__item">
1204       <a href="../../package/pip/sql/" class="md-nav__link">
1205         sql
1206       </a>
1207     </li>
1208
1209
1210
1211
1212
1213
1214
1215     <li class="md-nav__item">
1216       <a href="../../package/pip/style/" class="md-nav__link">
1217         style
1218       </a>
1219     </li>
1220
1221
1222
1223
1224
1225
1226
1227     <li class="md-nav__item">
1228       <a href="../../package/pip/template/" class="md-nav__link">
1229         template
1230       </a>
1231     </li>
1232
1233
1234
1235
1236
1237
1238
1239     <li class="md-nav__item">
1240       <a href="../../package/pip/template-listener/" class="md-nav__link">
1241         templateListener
1242       </a>
1243     </li>
1244
1245
1246
1247
1248
1249
1250
1251     <li class="md-nav__item">
1252       <a href="../../package/pip/user-group-option/" class="md-nav__link">
1253         userGroupOption
1254       </a>
1255     </li>
1256
1257
1258
1259
1260
1261
1262
1263     <li class="md-nav__item">
1264       <a href="../../package/pip/user-menu/" class="md-nav__link">
1265         userMenu
1266       </a>
1267     </li>
1268
1269
1270
1271
1272
1273
1274
1275     <li class="md-nav__item">
1276       <a href="../../package/pip/user-notification-event/" class="md-nav__link">
1277         userNotificationEvent
1278       </a>
1279     </li>
1280
1281
1282
1283
1284
1285
1286
1287     <li class="md-nav__item">
1288       <a href="../../package/pip/user-option/" class="md-nav__link">
1289         userOption
1290       </a>
1291     </li>
1292
1293
1294
1295
1296
1297
1298
1299     <li class="md-nav__item">
1300       <a href="../../package/pip/user-profile-menu/" class="md-nav__link">
1301         userProfileMenu
1302       </a>
1303     </li>
1304
1305
1306
1307         </ul>
1308       </nav>
1309     </li>
1310
1311
1312
1313
1314
1315
1316
1317     <li class="md-nav__item">
1318       <a href="../../package/database-php-api/" class="md-nav__link">
1319         Database PHP API
1320       </a>
1321     </li>
1322
1323
1324
1325         </ul>
1326       </nav>
1327     </li>
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339     <li class="md-nav__item md-nav__item--nested">
1340
1341
1342         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_6" type="checkbox" id="__nav_6" >
1343
1344       <label class="md-nav__link" for="__nav_6">
1345         Migration
1346         <span class="md-nav__icon md-icon"></span>
1347       </label>
1348       <nav class="md-nav" aria-label="Migration" data-md-level="1">
1349         <label class="md-nav__title" for="__nav_6">
1350           <span class="md-nav__icon md-icon"></span>
1351           Migration
1352         </label>
1353         <ul class="md-nav__list" data-md-scrollfix>
1354
1355
1356
1357
1358
1359
1360     <li class="md-nav__item md-nav__item--nested">
1361
1362
1363         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_6_1" type="checkbox" id="__nav_6_1" >
1364
1365       <label class="md-nav__link" for="__nav_6_1">
1366         Migrating from WSC 5.3
1367         <span class="md-nav__icon md-icon"></span>
1368       </label>
1369       <nav class="md-nav" aria-label="Migrating from WSC 5.3" data-md-level="2">
1370         <label class="md-nav__title" for="__nav_6_1">
1371           <span class="md-nav__icon md-icon"></span>
1372           Migrating from WSC 5.3
1373         </label>
1374         <ul class="md-nav__list" data-md-scrollfix>
1375
1376
1377
1378
1379
1380     <li class="md-nav__item">
1381       <a href="../../migration/wsc53/php/" class="md-nav__link">
1382         PHP API
1383       </a>
1384     </li>
1385
1386
1387
1388
1389
1390
1391
1392     <li class="md-nav__item">
1393       <a href="../../migration/wsc53/session/" class="md-nav__link">
1394         Session Handling and Authentication
1395       </a>
1396     </li>
1397
1398
1399
1400
1401
1402
1403
1404     <li class="md-nav__item">
1405       <a href="../../migration/wsc53/javascript/" class="md-nav__link">
1406         JavaScript
1407       </a>
1408     </li>
1409
1410
1411
1412
1413
1414
1415
1416     <li class="md-nav__item">
1417       <a href="../../migration/wsc53/templates/" class="md-nav__link">
1418         Templates
1419       </a>
1420     </li>
1421
1422
1423
1424
1425
1426
1427
1428     <li class="md-nav__item">
1429       <a href="../../migration/wsc53/libraries/" class="md-nav__link">
1430         Third Party Libraries
1431       </a>
1432     </li>
1433
1434
1435
1436         </ul>
1437       </nav>
1438     </li>
1439
1440
1441
1442
1443
1444
1445
1446
1447     <li class="md-nav__item md-nav__item--nested">
1448
1449
1450         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_6_2" type="checkbox" id="__nav_6_2" >
1451
1452       <label class="md-nav__link" for="__nav_6_2">
1453         Migrating from WSC 5.2
1454         <span class="md-nav__icon md-icon"></span>
1455       </label>
1456       <nav class="md-nav" aria-label="Migrating from WSC 5.2" data-md-level="2">
1457         <label class="md-nav__title" for="__nav_6_2">
1458           <span class="md-nav__icon md-icon"></span>
1459           Migrating from WSC 5.2
1460         </label>
1461         <ul class="md-nav__list" data-md-scrollfix>
1462
1463
1464
1465
1466
1467     <li class="md-nav__item">
1468       <a href="../../migration/wsc52/php/" class="md-nav__link">
1469         PHP API
1470       </a>
1471     </li>
1472
1473
1474
1475
1476
1477
1478
1479     <li class="md-nav__item">
1480       <a href="../../migration/wsc52/templates/" class="md-nav__link">
1481         Templates and Languages
1482       </a>
1483     </li>
1484
1485
1486
1487
1488
1489
1490
1491     <li class="md-nav__item">
1492       <a href="../../migration/wsc52/libraries/" class="md-nav__link">
1493         Third Party Libraries
1494       </a>
1495     </li>
1496
1497
1498
1499         </ul>
1500       </nav>
1501     </li>
1502
1503
1504
1505
1506
1507
1508
1509
1510     <li class="md-nav__item md-nav__item--nested">
1511
1512
1513         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_6_3" type="checkbox" id="__nav_6_3" >
1514
1515       <label class="md-nav__link" for="__nav_6_3">
1516         Migrating from WSC 3.1
1517         <span class="md-nav__icon md-icon"></span>
1518       </label>
1519       <nav class="md-nav" aria-label="Migrating from WSC 3.1" data-md-level="2">
1520         <label class="md-nav__title" for="__nav_6_3">
1521           <span class="md-nav__icon md-icon"></span>
1522           Migrating from WSC 3.1
1523         </label>
1524         <ul class="md-nav__list" data-md-scrollfix>
1525
1526
1527
1528
1529
1530     <li class="md-nav__item">
1531       <a href="../../migration/wsc31/php/" class="md-nav__link">
1532         PHP API
1533       </a>
1534     </li>
1535
1536
1537
1538         </ul>
1539       </nav>
1540     </li>
1541
1542
1543
1544
1545
1546
1547
1548
1549     <li class="md-nav__item md-nav__item--nested">
1550
1551
1552         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_6_4" type="checkbox" id="__nav_6_4" >
1553
1554       <label class="md-nav__link" for="__nav_6_4">
1555         Migrating from WSC 3.0
1556         <span class="md-nav__icon md-icon"></span>
1557       </label>
1558       <nav class="md-nav" aria-label="Migrating from WSC 3.0" data-md-level="2">
1559         <label class="md-nav__title" for="__nav_6_4">
1560           <span class="md-nav__icon md-icon"></span>
1561           Migrating from WSC 3.0
1562         </label>
1563         <ul class="md-nav__list" data-md-scrollfix>
1564
1565
1566
1567
1568
1569     <li class="md-nav__item">
1570       <a href="../../migration/wsc30/php/" class="md-nav__link">
1571         PHP API
1572       </a>
1573     </li>
1574
1575
1576
1577
1578
1579
1580
1581     <li class="md-nav__item">
1582       <a href="../../migration/wsc30/javascript/" class="md-nav__link">
1583         JavaScript API
1584       </a>
1585     </li>
1586
1587
1588
1589
1590
1591
1592
1593     <li class="md-nav__item">
1594       <a href="../../migration/wsc30/templates/" class="md-nav__link">
1595         Templates
1596       </a>
1597     </li>
1598
1599
1600
1601
1602
1603
1604
1605     <li class="md-nav__item">
1606       <a href="../../migration/wsc30/css/" class="md-nav__link">
1607         CSS
1608       </a>
1609     </li>
1610
1611
1612
1613
1614
1615
1616
1617     <li class="md-nav__item">
1618       <a href="../../migration/wsc30/package/" class="md-nav__link">
1619         Package Components
1620       </a>
1621     </li>
1622
1623
1624
1625         </ul>
1626       </nav>
1627     </li>
1628
1629
1630
1631
1632
1633
1634
1635
1636     <li class="md-nav__item md-nav__item--nested">
1637
1638
1639         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_6_5" type="checkbox" id="__nav_6_5" >
1640
1641       <label class="md-nav__link" for="__nav_6_5">
1642         Migrating from WCF 2.1
1643         <span class="md-nav__icon md-icon"></span>
1644       </label>
1645       <nav class="md-nav" aria-label="Migrating from WCF 2.1" data-md-level="2">
1646         <label class="md-nav__title" for="__nav_6_5">
1647           <span class="md-nav__icon md-icon"></span>
1648           Migrating from WCF 2.1
1649         </label>
1650         <ul class="md-nav__list" data-md-scrollfix>
1651
1652
1653
1654
1655
1656     <li class="md-nav__item">
1657       <a href="../../migration/wcf21/php/" class="md-nav__link">
1658         PHP API
1659       </a>
1660     </li>
1661
1662
1663
1664
1665
1666
1667
1668     <li class="md-nav__item">
1669       <a href="../../migration/wcf21/templates/" class="md-nav__link">
1670         Templates
1671       </a>
1672     </li>
1673
1674
1675
1676
1677
1678
1679
1680     <li class="md-nav__item">
1681       <a href="../../migration/wcf21/css/" class="md-nav__link">
1682         CSS
1683       </a>
1684     </li>
1685
1686
1687
1688
1689
1690
1691
1692     <li class="md-nav__item">
1693       <a href="../../migration/wcf21/package/" class="md-nav__link">
1694         Package Components
1695       </a>
1696     </li>
1697
1698
1699
1700         </ul>
1701       </nav>
1702     </li>
1703
1704
1705
1706         </ul>
1707       </nav>
1708     </li>
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720     <li class="md-nav__item md-nav__item--nested">
1721
1722
1723         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_7" type="checkbox" id="__nav_7" >
1724
1725       <label class="md-nav__link" for="__nav_7">
1726         Tutorials
1727         <span class="md-nav__icon md-icon"></span>
1728       </label>
1729       <nav class="md-nav" aria-label="Tutorials" data-md-level="1">
1730         <label class="md-nav__title" for="__nav_7">
1731           <span class="md-nav__icon md-icon"></span>
1732           Tutorials
1733         </label>
1734         <ul class="md-nav__list" data-md-scrollfix>
1735
1736
1737
1738
1739
1740
1741     <li class="md-nav__item md-nav__item--nested">
1742
1743
1744         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_7_1" type="checkbox" id="__nav_7_1" >
1745
1746       <label class="md-nav__link" for="__nav_7_1">
1747         Tutorial Series
1748         <span class="md-nav__icon md-icon"></span>
1749       </label>
1750       <nav class="md-nav" aria-label="Tutorial Series" data-md-level="2">
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1843     SPL Exceptions
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1849   <a href="#custom-exceptions" class="md-nav__link">
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1872                 <h1 id="exceptions">Exceptions<a class="headerlink" href="#exceptions" title="Permanent link">#</a></h1>
1873 <h2 id="spl-exceptions">SPL Exceptions<a class="headerlink" href="#spl-exceptions" title="Permanent link">#</a></h2>
1874 <p>The <a href="https://secure.php.net/manual/en/book.spl.php">Standard PHP Library (SPL)</a> provides some <a href="https://secure.php.net/manual/en/spl.exceptions.php">exceptions</a> that should be used whenever possible.</p>
1875 <h2 id="custom-exceptions">Custom Exceptions<a class="headerlink" href="#custom-exceptions" title="Permanent link">#</a></h2>
1876 <div class="admonition warning">
1877 <p class="admonition-title">Do not use <code>wcf\system\exception\SystemException</code> anymore, use specific exception classes!</p>
1878 </div>
1879 <p>The following table contains a list of custom exceptions that are commonly used.
1880 All of the exceptions are found in the <code>wcf\system\exception</code> namespace.</p>
1881 <table>
1882 <thead>
1883 <tr>
1884 <th>Class name</th>
1885 <th>(examples) when to use</th>
1886 </tr>
1887 </thead>
1888 <tbody>
1889 <tr>
1890 <td><code>IllegalLinkException</code></td>
1891 <td>access to a page that belongs to a non-existing object, executing actions on specific non-existing objects (is shown as http 404 error to the user)</td>
1892 </tr>
1893 <tr>
1894 <td><code>ImplementationException</code></td>
1895 <td>a class does not implement an expected interface</td>
1896 </tr>
1897 <tr>
1898 <td><code>InvalidObjectArgument</code></td>
1899 <td><span class="label label-info">5.4+</span> API method support generic objects but specific implementation requires objects of specific (sub)class and different object is given</td>
1900 </tr>
1901 <tr>
1902 <td><code>InvalidObjectTypeException</code></td>
1903 <td>object type is not of an expected object type definition</td>
1904 </tr>
1905 <tr>
1906 <td><code>InvalidSecurityTokenException</code></td>
1907 <td>given security token does not match the security token of the active user's session</td>
1908 </tr>
1909 <tr>
1910 <td><code>ParentClassException</code></td>
1911 <td>a class does not extend an expected (parent) class</td>
1912 </tr>
1913 <tr>
1914 <td><code>PermissionDeniedException</code></td>
1915 <td>page access without permission, action execution without permission (is shown as http 403 error to the user)</td>
1916 </tr>
1917 <tr>
1918 <td><code>UserInputException</code></td>
1919 <td>user input does not pass validation</td>
1920 </tr>
1921 </tbody>
1922 </table>
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