Php 类型3验证码错误

几天后，验证码图像不再显示

当我试图访问captcha.php时，该文件给了我一个错误：

致命错误：在第10行的/typo3conf/localconf.php中找不到类“t3lib_div”

查找localconf.php文件时，前20行如下所示：

<?php
$TYPO3_CONF_VARS['SYS']['sitename'] = 'New TYPO3 site';
    // Default password is "joh316" :
$TYPO3_CONF_VARS['BE']['installToolPassword'] = 'bacb98acf97e0b6112b1d1b650b84971';
$TYPO3_CONF_VARS['EXT']['extList'] = 'tsconfig_help,context_help,extra_page_cm_options,impexp,sys_note,tstemplate,tstemplate_ceditor,tstemplate_info,tstemplate_objbrowser,tstemplate_analyzer,func_wizards,wizard_crpages,wizard_sortpages,lowlevel,install,belog,beuser,aboutmodules,setup,taskcenter,info_pagetsconfig,viewpage,rtehtmlarea,css_styled_content,t3skin';
$typo_db_extTableDef_script = 'extTables.php';

// MAX FILE SIZE
$TYPO3_CONF_VARS['BE']['maxFileSize'] = '100000';
t3lib_div::loadTCA('tt_content');
// This changes the upload limit for image elements
$TCA['tt_content']['columns']['image']['config']['max_size'] = 100000;

// This changes the upload limit for media elements
$TCA['tt_content']['columns']['media']['config']['max_size'] = 100000;

// This changes the upload limit for multimedia elements
$TCA['tt_content']['columns']['multimedia']['config']['max_size'] = 100000;

---

最好将下面的设置放在扩展名为ext_tables.php的文件中

但如果没有任何特殊的ext，那么可以将其放入
typo3conf/extTables.php
文件中。之后，关于
t3lib_div
未找到的错误应消失

// MAX FILE SIZE
$TYPO3_CONF_VARS['BE']['maxFileSize'] = '100000';
t3lib_div::loadTCA('tt_content');
// This changes the upload limit for image elements
$TCA['tt_content']['columns']['image']['config']['max_size'] = 100000;

// This changes the upload limit for media elements
$TCA['tt_content']['columns']['media']['config']['max_size'] = 100000;

// This changes the upload limit for multimedia elements
$TCA['tt_content']['columns']['multimedia']['config']['max_size'] = 100000;

为什么在localconf.php中有TCA设置？