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 727       <nav class="md-nav" aria-label="New API" data-md-level="2">
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 763       <a href="../../../javascript/new-api_core/" class="md-nav__link">
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 775       <a href="../../../javascript/new-api_dom/" class="md-nav__link">
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 787       <a href="../../../javascript/new-api_events/" class="md-nav__link">
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 791
 792
 793
 794
 795
 796
 797
 798     <li class="md-nav__item">
 799       <a href="../../../javascript/new-api_ajax/" class="md-nav__link">
 800         Ajax
 801       </a>
 802     </li>
 803
 804
 805
 806
 807
 808
 809
 810     <li class="md-nav__item">
 811       <a href="../../../javascript/new-api_dialogs/" class="md-nav__link">
 812         Dialogs
 813       </a>
 814     </li>
 815
 816
 817
 818
 819
 820
 821
 822     <li class="md-nav__item">
 823       <a href="../../../javascript/new-api_browser/" class="md-nav__link">
 824         Browser and Screen Sizes
 825       </a>
 826     </li>
 827
 828
 829
 830
 831
 832
 833
 834     <li class="md-nav__item">
 835       <a href="../../../javascript/new-api_ui/" class="md-nav__link">
 836         User Interface
 837       </a>
 838     </li>
 839
 840
 841
 842         </ul>
 843       </nav>
 844     </li>
 845
 846
 847
 848
 849
 850
 851
 852     <li class="md-nav__item">
 853       <a href="../../../javascript/legacy-api/" class="md-nav__link">
 854         Legacy API
 855       </a>
 856     </li>
 857
 858
 859
 860
 861
 862
 863
 864     <li class="md-nav__item">
 865       <a href="../../../javascript/helper-functions/" class="md-nav__link">
 866         Helper Functions
 867       </a>
 868     </li>
 869
 870
 871
 872
 873
 874
 875
 876     <li class="md-nav__item">
 877       <a href="../../../javascript/code-snippets/" class="md-nav__link">
 878         Code Snippets
 879       </a>
 880     </li>
 881
 882
 883
 884         </ul>
 885       </nav>
 886     </li>
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898     <li class="md-nav__item md-nav__item--nested">
 899
 900
 901         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_5" type="checkbox" id="__nav_5" >
 902
 903       <label class="md-nav__link" for="__nav_5">
 904         Package Components
 905         <span class="md-nav__icon md-icon"></span>
 906       </label>
 907       <nav class="md-nav" aria-label="Package Components" data-md-level="1">
 908         <label class="md-nav__title" for="__nav_5">
 909           <span class="md-nav__icon md-icon"></span>
 910           Package Components
 911         </label>
 912         <ul class="md-nav__list" data-md-scrollfix>
 913
 914
 915
 916
 917
 918     <li class="md-nav__item">
 919       <a href="../../../package/package-xml/" class="md-nav__link">
 920         package.xml
 921       </a>
 922     </li>
 923
 924
 925
 926
 927
 928
 929
 930
 931     <li class="md-nav__item md-nav__item--nested">
 932
 933
 934         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_5_2" type="checkbox" id="__nav_5_2" >
 935
 936       <label class="md-nav__link" for="__nav_5_2">
 937         PIPs
 938         <span class="md-nav__icon md-icon"></span>
 939       </label>
 940       <nav class="md-nav" aria-label="PIPs" data-md-level="2">
 941         <label class="md-nav__title" for="__nav_5_2">
 942           <span class="md-nav__icon md-icon"></span>
 943           PIPs
 944         </label>
 945         <ul class="md-nav__list" data-md-scrollfix>
 946
 947
 948
 949
 950
 951     <li class="md-nav__item">
 952       <a href="../../../package/pip/" class="md-nav__link">
 953         Overview
 954       </a>
 955     </li>
 956
 957
 958
 959
 960
 961
 962
 963     <li class="md-nav__item">
 964       <a href="../../../package/pip/acl-option/" class="md-nav__link">
 965         aclOption
 966       </a>
 967     </li>
 968
 969
 970
 971
 972
 973
 974
 975     <li class="md-nav__item">
 976       <a href="../../../package/pip/acp-menu/" class="md-nav__link">
 977         acpMenu
 978       </a>
 979     </li>
 980
 981
 982
 983
 984
 985
 986
 987     <li class="md-nav__item">
 988       <a href="../../../package/pip/acp-search-provider/" class="md-nav__link">
 989         acpSearchProvider
 990       </a>
 991     </li>
 992
 993
 994
 995
 996
 997
 998
 999     <li class="md-nav__item">
1000       <a href="../../../package/pip/acp-template/" class="md-nav__link">
1001         acpTemplate
1002       </a>
1003     </li>
1004
1005
1006
1007
1008
1009
1010
1011     <li class="md-nav__item">
1012       <a href="../../../package/pip/bbcode/" class="md-nav__link">
1013         bbcode
1014       </a>
1015     </li>
1016
1017
1018
1019
1020
1021
1022
1023     <li class="md-nav__item">
1024       <a href="../../../package/pip/box/" class="md-nav__link">
1025         box
1026       </a>
1027     </li>
1028
1029
1030
1031
1032
1033
1034
1035     <li class="md-nav__item">
1036       <a href="../../../package/pip/clipboard-action/" class="md-nav__link">
1037         clipboardAction
1038       </a>
1039     </li>
1040
1041
1042
1043
1044
1045
1046
1047     <li class="md-nav__item">
1048       <a href="../../../package/pip/core-object/" class="md-nav__link">
1049         coreObject
1050       </a>
1051     </li>
1052
1053
1054
1055
1056
1057
1058
1059     <li class="md-nav__item">
1060       <a href="../../../package/pip/cronjob/" class="md-nav__link">
1061         cronjob
1062       </a>
1063     </li>
1064
1065
1066
1067
1068
1069
1070
1071     <li class="md-nav__item">
1072       <a href="../../../package/pip/database/" class="md-nav__link">
1073         database
1074       </a>
1075     </li>
1076
1077
1078
1079
1080
1081
1082
1083     <li class="md-nav__item">
1084       <a href="../../../package/pip/event-listener/" class="md-nav__link">
1085         eventListener
1086       </a>
1087     </li>
1088
1089
1090
1091
1092
1093
1094
1095     <li class="md-nav__item">
1096       <a href="../../../package/pip/file/" class="md-nav__link">
1097         file
1098       </a>
1099     </li>
1100
1101
1102
1103
1104
1105
1106
1107     <li class="md-nav__item">
1108       <a href="../../../package/pip/language/" class="md-nav__link">
1109         language
1110       </a>
1111     </li>
1112
1113
1114
1115
1116
1117
1118
1119     <li class="md-nav__item">
1120       <a href="../../../package/pip/media-provider/" class="md-nav__link">
1121         mediaProvider
1122       </a>
1123     </li>
1124
1125
1126
1127
1128
1129
1130
1131     <li class="md-nav__item">
1132       <a href="../../../package/pip/menu/" class="md-nav__link">
1133         menu
1134       </a>
1135     </li>
1136
1137
1138
1139
1140
1141
1142
1143     <li class="md-nav__item">
1144       <a href="../../../package/pip/menu-item/" class="md-nav__link">
1145         menuItem
1146       </a>
1147     </li>
1148
1149
1150
1151
1152
1153
1154
1155     <li class="md-nav__item">
1156       <a href="../../../package/pip/object-type/" class="md-nav__link">
1157         objectType
1158       </a>
1159     </li>
1160
1161
1162
1163
1164
1165
1166
1167     <li class="md-nav__item">
1168       <a href="../../../package/pip/object-type-definition/" class="md-nav__link">
1169         objectTypeDefinition
1170       </a>
1171     </li>
1172
1173
1174
1175
1176
1177
1178
1179     <li class="md-nav__item">
1180       <a href="../../../package/pip/option/" class="md-nav__link">
1181         option
1182       </a>
1183     </li>
1184
1185
1186
1187
1188
1189
1190
1191     <li class="md-nav__item">
1192       <a href="../../../package/pip/page/" class="md-nav__link">
1193         page
1194       </a>
1195     </li>
1196
1197
1198
1199
1200
1201
1202
1203     <li class="md-nav__item">
1204       <a href="../../../package/pip/pip/" class="md-nav__link">
1205         pip
1206       </a>
1207     </li>
1208
1209
1210
1211
1212
1213
1214
1215     <li class="md-nav__item">
1216       <a href="../../../package/pip/script/" class="md-nav__link">
1217         script
1218       </a>
1219     </li>
1220
1221
1222
1223
1224
1225
1226
1227     <li class="md-nav__item">
1228       <a href="../../../package/pip/smiley/" class="md-nav__link">
1229         smiley
1230       </a>
1231     </li>
1232
1233
1234
1235
1236
1237
1238
1239     <li class="md-nav__item">
1240       <a href="../../../package/pip/sql/" class="md-nav__link">
1241         sql
1242       </a>
1243     </li>
1244
1245
1246
1247
1248
1249
1250
1251     <li class="md-nav__item">
1252       <a href="../../../package/pip/style/" class="md-nav__link">
1253         style
1254       </a>
1255     </li>
1256
1257
1258
1259
1260
1261
1262
1263     <li class="md-nav__item">
1264       <a href="../../../package/pip/template/" class="md-nav__link">
1265         template
1266       </a>
1267     </li>
1268
1269
1270
1271
1272
1273
1274
1275     <li class="md-nav__item">
1276       <a href="../../../package/pip/template-listener/" class="md-nav__link">
1277         templateListener
1278       </a>
1279     </li>
1280
1281
1282
1283
1284
1285
1286
1287     <li class="md-nav__item">
1288       <a href="../../../package/pip/user-group-option/" class="md-nav__link">
1289         userGroupOption
1290       </a>
1291     </li>
1292
1293
1294
1295
1296
1297
1298
1299     <li class="md-nav__item">
1300       <a href="../../../package/pip/user-menu/" class="md-nav__link">
1301         userMenu
1302       </a>
1303     </li>
1304
1305
1306
1307
1308
1309
1310
1311     <li class="md-nav__item">
1312       <a href="../../../package/pip/user-notification-event/" class="md-nav__link">
1313         userNotificationEvent
1314       </a>
1315     </li>
1316
1317
1318
1319
1320
1321
1322
1323     <li class="md-nav__item">
1324       <a href="../../../package/pip/user-option/" class="md-nav__link">
1325         userOption
1326       </a>
1327     </li>
1328
1329
1330
1331
1332
1333
1334
1335     <li class="md-nav__item">
1336       <a href="../../../package/pip/user-profile-menu/" class="md-nav__link">
1337         userProfileMenu
1338       </a>
1339     </li>
1340
1341
1342
1343         </ul>
1344       </nav>
1345     </li>
1346
1347
1348
1349
1350
1351
1352
1353     <li class="md-nav__item">
1354       <a href="../../../package/database-php-api/" class="md-nav__link">
1355         Database PHP API
1356       </a>
1357     </li>
1358
1359
1360
1361         </ul>
1362       </nav>
1363     </li>
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377     <li class="md-nav__item md-nav__item--active md-nav__item--nested">
1378
1379
1380         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_6" type="checkbox" id="__nav_6" checked>
1381
1382       <label class="md-nav__link" for="__nav_6">
1383         Migration
1384         <span class="md-nav__icon md-icon"></span>
1385       </label>
1386       <nav class="md-nav" aria-label="Migration" data-md-level="1">
1387         <label class="md-nav__title" for="__nav_6">
1388           <span class="md-nav__icon md-icon"></span>
1389           Migration
1390         </label>
1391         <ul class="md-nav__list" data-md-scrollfix>
1392
1393
1394
1395
1396
1397
1398
1399
1400     <li class="md-nav__item md-nav__item--active md-nav__item--nested">
1401
1402
1403         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_6_1" type="checkbox" id="__nav_6_1" checked>
1404
1405       <label class="md-nav__link" for="__nav_6_1">
1406         Migrating from WSC 5.3
1407         <span class="md-nav__icon md-icon"></span>
1408       </label>
1409       <nav class="md-nav" aria-label="Migrating from WSC 5.3" data-md-level="2">
1410         <label class="md-nav__title" for="__nav_6_1">
1411           <span class="md-nav__icon md-icon"></span>
1412           Migrating from WSC 5.3
1413         </label>
1414         <ul class="md-nav__list" data-md-scrollfix>
1415
1416
1417
1418
1419
1420
1421
1422     <li class="md-nav__item md-nav__item--active">
1423
1424       <input class="md-nav__toggle md-toggle" data-md-toggle="toc" type="checkbox" id="__toc">
1425
1426
1427
1428
1429         <label class="md-nav__link md-nav__link--active" for="__toc">
1430           PHP API
1431           <span class="md-nav__icon md-icon"></span>
1432         </label>
1433
1434       <a href="./" class="md-nav__link md-nav__link--active">
1435         PHP API
1436       </a>
1437
1438
1439 <nav class="md-nav md-nav--secondary" aria-label="Table of contents">
1440
1441
1442
1443
1444
1445     <label class="md-nav__title" for="__toc">
1446       <span class="md-nav__icon md-icon"></span>
1447       Table of contents
1448     </label>
1449     <ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
1450
1451         <li class="md-nav__item">
1452   <a href="#minimum-requirements" class="md-nav__link">
1453     Minimum requirements
1454   </a>
1455
1456 </li>
1457
1458         <li class="md-nav__item">
1459   <a href="#flood-control" class="md-nav__link">
1460     Flood Control
1461   </a>
1462
1463 </li>
1464
1465         <li class="md-nav__item">
1466   <a href="#databasepackageinstallationplugin" class="md-nav__link">
1467     DatabasePackageInstallationPlugin
1468   </a>
1469
1470 </li>
1471
1472         <li class="md-nav__item">
1473   <a href="#php-database-api" class="md-nav__link">
1474     PHP Database API
1475   </a>
1476
1477 </li>
1478
1479         <li class="md-nav__item">
1480   <a href="#captcha" class="md-nav__link">
1481     Captcha
1482   </a>
1483
1484 </li>
1485
1486         <li class="md-nav__item">
1487   <a href="#search" class="md-nav__link">
1488     Search
1489   </a>
1490
1491 </li>
1492
1493         <li class="md-nav__item">
1494   <a href="#styles" class="md-nav__link">
1495     Styles
1496   </a>
1497
1498 </li>
1499
1500         <li class="md-nav__item">
1501   <a href="#tags" class="md-nav__link">
1502     Tags
1503   </a>
1504
1505 </li>
1506
1507         <li class="md-nav__item">
1508   <a href="#avatars" class="md-nav__link">
1509     Avatars
1510   </a>
1511
1512 </li>
1513
1514         <li class="md-nav__item">
1515   <a href="#linebreakseparatedtext-option-type" class="md-nav__link">
1516     lineBreakSeparatedText Option Type
1517   </a>
1518
1519 </li>
1520
1521     </ul>
1522
1523 </nav>
1524
1525     </li>
1526
1527
1528
1529
1530
1531
1532
1533     <li class="md-nav__item">
1534       <a href="../session/" class="md-nav__link">
1535         Session Handling and Authentication
1536       </a>
1537     </li>
1538
1539
1540
1541
1542
1543
1544
1545     <li class="md-nav__item">
1546       <a href="../javascript/" class="md-nav__link">
1547         TypeScript and JavaScript
1548       </a>
1549     </li>
1550
1551
1552
1553
1554
1555
1556
1557     <li class="md-nav__item">
1558       <a href="../templates/" class="md-nav__link">
1559         Templates
1560       </a>
1561     </li>
1562
1563
1564
1565
1566
1567
1568
1569     <li class="md-nav__item">
1570       <a href="../libraries/" class="md-nav__link">
1571         Third Party Libraries
1572       </a>
1573     </li>
1574
1575
1576
1577         </ul>
1578       </nav>
1579     </li>
1580
1581
1582
1583
1584
1585
1586
1587
1588     <li class="md-nav__item md-nav__item--nested">
1589
1590
1591         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_6_2" type="checkbox" id="__nav_6_2" >
1592
1593       <label class="md-nav__link" for="__nav_6_2">
1594         Migrating from WSC 5.2
1595         <span class="md-nav__icon md-icon"></span>
1596       </label>
1597       <nav class="md-nav" aria-label="Migrating from WSC 5.2" data-md-level="2">
1598         <label class="md-nav__title" for="__nav_6_2">
1599           <span class="md-nav__icon md-icon"></span>
1600           Migrating from WSC 5.2
1601         </label>
1602         <ul class="md-nav__list" data-md-scrollfix>
1603
1604
1605
1606
1607
1608     <li class="md-nav__item">
1609       <a href="../../wsc52/php/" class="md-nav__link">
1610         PHP API
1611       </a>
1612     </li>
1613
1614
1615
1616
1617
1618
1619
1620     <li class="md-nav__item">
1621       <a href="../../wsc52/templates/" class="md-nav__link">
1622         Templates and Languages
1623       </a>
1624     </li>
1625
1626
1627
1628
1629
1630
1631
1632     <li class="md-nav__item">
1633       <a href="../../wsc52/libraries/" class="md-nav__link">
1634         Third Party Libraries
1635       </a>
1636     </li>
1637
1638
1639
1640         </ul>
1641       </nav>
1642     </li>
1643
1644
1645
1646
1647
1648
1649
1650
1651     <li class="md-nav__item md-nav__item--nested">
1652
1653
1654         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_6_3" type="checkbox" id="__nav_6_3" >
1655
1656       <label class="md-nav__link" for="__nav_6_3">
1657         Migrating from WSC 3.1
1658         <span class="md-nav__icon md-icon"></span>
1659       </label>
1660       <nav class="md-nav" aria-label="Migrating from WSC 3.1" data-md-level="2">
1661         <label class="md-nav__title" for="__nav_6_3">
1662           <span class="md-nav__icon md-icon"></span>
1663           Migrating from WSC 3.1
1664         </label>
1665         <ul class="md-nav__list" data-md-scrollfix>
1666
1667
1668
1669
1670
1671     <li class="md-nav__item">
1672       <a href="../../wsc31/php/" class="md-nav__link">
1673         PHP API
1674       </a>
1675     </li>
1676
1677
1678
1679         </ul>
1680       </nav>
1681     </li>
1682
1683
1684
1685
1686
1687
1688
1689
1690     <li class="md-nav__item md-nav__item--nested">
1691
1692
1693         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_6_4" type="checkbox" id="__nav_6_4" >
1694
1695       <label class="md-nav__link" for="__nav_6_4">
1696         Migrating from WSC 3.0
1697         <span class="md-nav__icon md-icon"></span>
1698       </label>
1699       <nav class="md-nav" aria-label="Migrating from WSC 3.0" data-md-level="2">
1700         <label class="md-nav__title" for="__nav_6_4">
1701           <span class="md-nav__icon md-icon"></span>
1702           Migrating from WSC 3.0
1703         </label>
1704         <ul class="md-nav__list" data-md-scrollfix>
1705
1706
1707
1708
1709
1710     <li class="md-nav__item">
1711       <a href="../../wsc30/php/" class="md-nav__link">
1712         PHP API
1713       </a>
1714     </li>
1715
1716
1717
1718
1719
1720
1721
1722     <li class="md-nav__item">
1723       <a href="../../wsc30/javascript/" class="md-nav__link">
1724         JavaScript API
1725       </a>
1726     </li>
1727
1728
1729
1730
1731
1732
1733
1734     <li class="md-nav__item">
1735       <a href="../../wsc30/templates/" class="md-nav__link">
1736         Templates
1737       </a>
1738     </li>
1739
1740
1741
1742
1743
1744
1745
1746     <li class="md-nav__item">
1747       <a href="../../wsc30/css/" class="md-nav__link">
1748         CSS
1749       </a>
1750     </li>
1751
1752
1753
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1982         <li class="md-nav__item">
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1984     Minimum requirements
1985   </a>
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1989         <li class="md-nav__item">
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1991     Flood Control
1992   </a>
1993
1994 </li>
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1998     DatabasePackageInstallationPlugin
1999   </a>
2000
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2069                 <h1 id="migrating-from-wsc-53-php">Migrating from WSC 5.3 - PHP<a class="headerlink" href="#migrating-from-wsc-53-php" title="Permanent link">#</a></h1>
2070 <h2 id="minimum-requirements">Minimum requirements<a class="headerlink" href="#minimum-requirements" title="Permanent link">#</a></h2>
2071 <p>The minimum requirements have been increased to the following:</p>
2072 <ul>
2073 <li><strong>PHP:</strong> 7.2.24</li>
2074 <li><strong>MySQL:</strong> 5.7.31 or 8.0.19</li>
2075 <li><strong>MariaDB:</strong> 10.1.44</li>
2076 </ul>
2077 <p>Most notably PHP 7.2 contains usable support for scalar types by the addition of nullable types in PHP 7.1 and parameter type widening in PHP 7.2.</p>
2078 <p>It is recommended to make use of scalar types and other newly introduced features whereever possible.
2079 Please refer to the PHP documentation for details.</p>
2080 <h2 id="flood-control">Flood Control<a class="headerlink" href="#flood-control" title="Permanent link">#</a></h2>
2081 <p>To prevent users from creating massive amounts of contents in short periods of time, i.e., spam, existing systems already use flood control mechanisms to limit the amount of contents created within a certain period of time.
2082 With WoltLab Suite 5.4, we have added a general API that manages such rate limiting.
2083 Leveraging this API is easily done.</p>
2084 <ol>
2085 <li>Register an object type for the definition <code>com.woltlab.wcf.floodControl</code>: <code>com.example.foo.myContent</code>.</li>
2086 <li>Whenever the active user creates content of this type, call
2087     <div class="highlight"><pre><span></span><code><span class="nx">FloodControl</span><span class="o">::</span><span class="na">getInstance</span><span class="p">()</span><span class="o">-&gt;</span><span class="na">registerContent</span><span class="p">(</span><span class="s1">&#39;com.example.foo.myContent&#39;</span><span class="p">);</span>
2088 </code></pre></div>
2089     You should only call this method if the user creates the content themselves.
2090     If the content is automatically created by the system, for example when copying / duplicating existing content, no activity should be registered.</li>
2091 <li>
2092 <p>To check the last time when the active user created content of the relevant type, use
2093     <div class="highlight"><pre><span></span><code><span class="nx">FloodControl</span><span class="o">::</span><span class="na">getInstance</span><span class="p">()</span><span class="o">-&gt;</span><span class="na">getLastTime</span><span class="p">(</span><span class="s1">&#39;com.example.foo.myContent&#39;</span><span class="p">);</span>
2094 </code></pre></div>
2095     If you want to limit the number of content items created within a certain period of time, for example within one day, use
2096     <div class="highlight"><pre><span></span><code><span class="nv">$data</span> <span class="o">=</span> <span class="nx">FloodControl</span><span class="o">::</span><span class="na">getInstance</span><span class="p">()</span><span class="o">-&gt;</span><span class="na">countContent</span><span class="p">(</span><span class="s1">&#39;com.example.foo.myContent&#39;</span><span class="p">,</span> <span class="k">new</span> <span class="nx">\DateInterval</span><span class="p">(</span><span class="s1">&#39;P1D&#39;</span><span class="p">));</span>
2097 <span class="c1">// number of content items created within the last day</span>
2098 <span class="nv">$count</span> <span class="o">=</span> <span class="nv">$data</span><span class="p">[</span><span class="s1">&#39;count&#39;</span><span class="p">];</span>
2099 <span class="c1">// timestamp when the earliest content item was created within the last day</span>
2100 <span class="nv">$earliestTime</span> <span class="o">=</span> <span class="nv">$data</span><span class="p">[</span><span class="s1">&#39;earliestTime&#39;</span><span class="p">];</span>
2101 </code></pre></div>
2102     The method also returns <code>earliestTime</code> so that you can tell the user in the error message when they are able again to create new content of the relevant type.</p>
2103 <div class="admonition info">
2104 <p class="admonition-title">Flood control entries are only stored for 31 days and older entries are cleaned up daily.</p>
2105 </div>
2106 </li>
2107 </ol>
2108 <p>The previously mentioned methods of <code>FloodControl</code> use the active user and the current timestamp as reference point.
2109 <code>FloodControl</code> also provides methods to register content or check flood control for other registered users or for guests via their IP address.
2110 For further details on these methods, please refer to the <a href="https://github.com/WoltLab/WCF/blob/master/wcfsetup/install/files/lib/system/flood/FloodControl.class.php">documentation in the FloodControl class</a>.</p>
2111 <div class="admonition warning">
2112 <p class="admonition-title">Do not interact directly with the flood control database table but only via the <code>FloodControl</code> class!</p>
2113 </div>
2114 <h2 id="databasepackageinstallationplugin">DatabasePackageInstallationPlugin<a class="headerlink" href="#databasepackageinstallationplugin" title="Permanent link">#</a></h2>
2115 <p><code>DatabasePackageInstallationPlugin</code> is a new idempotent package installation plugin (thus it is available in the sync function in the devtools) to update the database schema using the PHP-based database API.
2116 <code>DatabasePackageInstallationPlugin</code> is similar to <code>ScriptPackageInstallationPlugin</code> by requiring a PHP script that is included during the execution of the script.
2117 The script is expected to return an array of <code>DatabaseTable</code> objects representing the schema changes so that in contrast to using <code>ScriptPackageInstallationPlugin</code>, no <code>DatabaseTableChangeProcessor</code> object has to be created.
2118 The PHP file must be located in the <code>acp/database/</code> directory for the devtools sync function to recognize the file.</p>
2119 <h2 id="php-database-api">PHP Database API<a class="headerlink" href="#php-database-api" title="Permanent link">#</a></h2>
2120 <p>The PHP API to add and change database tables during package installations and updates in the <code>wcf\system\database\table</code> namespace now also supports renaming existing table columns with the new <code>IDatabaseTableColumn::renameTo()</code> method:</p>
2121 <div class="highlight"><pre><span></span><code><span class="nx">PartialDatabaseTable</span><span class="o">::</span><span class="na">create</span><span class="p">(</span><span class="s1">&#39;wcf1_test&#39;</span><span class="p">)</span>
2122         <span class="o">-&gt;</span><span class="na">columns</span><span class="p">([</span>
2123                 <span class="nx">NotNullInt10DatabaseTableColumn</span><span class="o">::</span><span class="na">create</span><span class="p">(</span><span class="s1">&#39;oldName&#39;</span><span class="p">)</span>
2124                         <span class="o">-&gt;</span><span class="na">renameTo</span><span class="p">(</span><span class="s1">&#39;newName&#39;</span><span class="p">)</span>
2125         <span class="p">]);</span>
2126 </code></pre></div>
2127 <div class="admonition info">
2128 <p class="admonition-title">Like with every change to existing database tables, packages can only rename columns that they installed.</p>
2129 </div>
2130 <h2 id="captcha">Captcha<a class="headerlink" href="#captcha" title="Permanent link">#</a></h2>
2131 <p>The reCAPTCHA v1 implementation was completely removed.
2132 This includes the <code>\wcf\system\recaptcha\RecaptchaHandler</code> class (not to be confused with the one in the <code>captcha</code> namespace).</p>
2133 <p>The reCAPTCHA v1 endpoints have already been turned off by Google and always return a HTTP 404.
2134 Thus the implementation was completely non-functional even before this change.</p>
2135 <p>See <a href="https://github.com/WoltLab/WCF/pull/3781">WoltLab/WCF#3781</a> for details.</p>
2136 <h2 id="search">Search<a class="headerlink" href="#search" title="Permanent link">#</a></h2>
2137 <p>The generic implementation in the <code>AbstractSearchEngine::parseSearchQuery()</code> method was dangerous, because it did not have knowledge about the search engine’s specifics.
2138 The implementation was completely removed: <code>AbstractSearchEngine::parseSearchQuery()</code> now always throws a <code>\BadMethodCallException</code>.</p>
2139 <p>If you implemented a custom search engine and relied on this method, you can inline the previous implementation to preserve existing behavior.
2140 You should take the time to verify the rewritten queries against the manual of the search engine to make sure it cannot generate malformed queries or security issues.</p>
2141 <p>See <a href="https://github.com/WoltLab/WCF/issues/3815">WoltLab/WCF#3815</a> for details.</p>
2142 <h2 id="styles">Styles<a class="headerlink" href="#styles" title="Permanent link">#</a></h2>
2143 <p>The <code>StyleCompiler</code> class is marked <code>final</code> now.
2144 The internal SCSS compiler object being stored in the <code>$compiler</code> property was a design issue that leaked compiler state across multiple compiled styles, possibly causing misgenerated stylesheets.
2145 As the removal of the <code>$compiler</code> property effectively broke compatibility within the <code>StyleCompiler</code> and as the <code>StyleCompiler</code> never was meant to be extended, it was marked final.</p>
2146 <p>See <a href="https://github.com/WoltLab/WCF/pull/3929">WoltLab/WCF#3929</a> for details.</p>
2147 <h2 id="tags">Tags<a class="headerlink" href="#tags" title="Permanent link">#</a></h2>
2148 <p>Use of the <code>wcf1_tag_to_object.languageID</code> column is deprecated.
2149 The <code>languageID</code> column is redundant, because its value can be derived from the <code>tagID</code>.
2150 With WoltLab Suite 5.4, it will no longer be part of any indices, allowing more efficient index usage in the general case.</p>
2151 <p>If you need to filter the contents of <code>wcf1_tag_to_object</code> by language, you should perform an <code>INNER JOIN wcf1_tag tag ON tag.tagID = tag_to_object.tagID</code> and filter on <code>wcf1_tag.languageID</code>.</p>
2152 <p>See <a href="https://github.com/WoltLab/WCF/pull/3904">WoltLab/WCF#3904</a> for details.</p>
2153 <h2 id="avatars">Avatars<a class="headerlink" href="#avatars" title="Permanent link">#</a></h2>
2154 <p>The <code>ISafeFormatAvatar</code> interface was added to properly support fallback image types for use in emails.
2155 If your custom <code>IUserAvatar</code> implementation supports image types without broad support (i.e. anything other than PNG, JPEG, and GIF), then you should implement the <code>ISafeFormatAvatar</code> interface to return a fallback PNG, JPEG, or GIF image.</p>
2156 <p>See <a href="https://github.com/WoltLab/WCF/pull/4001">WoltLab/WCF#4001</a> for details.</p>
2157 <h2 id="linebreakseparatedtext-option-type"><code>lineBreakSeparatedText</code> Option Type<a class="headerlink" href="#linebreakseparatedtext-option-type" title="Permanent link">#</a></h2>
2158 <p>Currently, several of the (user group) options installed by our packages use the <code>textarea</code> option type and split its value by linebreaks to get a list of items, for example for allowed file extensions.
2159 To improve the user interface when setting up the value of such options, we have added the <code>lineBreakSeparatedText</code> option type as a drop-in replacement where the individual items are explicitly represented as distinct items in the user interface.</p>
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