我正在使用filethingie将文件上传到我的网站。当我上传文件时，它会出现以下错误。
[07-Feb-2013 08:52:28 UTC] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so: cannot open shared object file: No such file or directory in Unknown on line 0
[07-Feb-2013 08:55:00 UTC] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so: cannot open shared object file: No such file or directory in Unknown on line 0
[07-Feb-2013 08:55:01 UTC] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so: cannot open shared object file: No such file or directory in Unknown on line 0
[07-Feb-2013 08:57:16 UTC] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so: cannot open shared object file: No such file or directory in Unknown on line 0
[07-Feb-2013 08:57:16 UTC] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so: cannot open shared object file: No such file or directory in Unknown on line 0
[07-Feb-2013 08:58:19 UTC] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so: cannot open shared object file: No such file or directory in Unknown on line 0
[07-Feb-2013 08:58:19 UTC] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so: cannot open shared object file: No such file or directory in Unknown on line 0
[07-Feb-2013 08:58:28 UTC] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so: cannot open shared object file: No such file or directory in Unknown on line 0
[07-Feb-2013 08:58:29 UTC] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so: cannot open shared object file: No such file or directory in Unknown on line 0
[07-Feb-2013 08:58:52 UTC] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so: cannot open shared object file: No such file or directory in Unknown on line 0
[07-Feb-2013 08:58:55 UTC] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so: cannot open shared object file: No such file or directory in Unknown on line 0
[07-Feb-2013 09:02:19 UTC] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so: cannot open shared object file: No such file or directory in Unknown on line 0
[07-Feb-2013 09:02:25 UTC] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so: cannot open shared object file: No such file or directory in Unknown on line 0
[07-Feb-2013 09:02:29 UTC] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so: cannot open shared object file: No such file or directory in Unknown on line 0
[07-Feb-2013 09:02:54 UTC] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so: cannot open shared object file: No such file or directory in Unknown on line 0
[07-Feb-2013 09:02:59 UTC] PHP Warning: preg_match() [<a href='function.preg-match'>function.preg-match</a>]: Unknown modifier ''' in /home/softlogi/public_html/Softlogic_Research/ft-admin.php on line 113
[07-Feb-2013 09:03:06 UTC] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20090626/pdf.so: cannot open shared object file: No such file or directory in Unknown on line 0
并显示
name.pdf未上传。不允许的文件类型
为什么会出现这个问题，我该如何解决？
看起来您在php.ini中添加了"pdf.so"，而没有实际安装扩展。
PHP Startup: Unable to load dynamic library
看起来pdf扩展插件安装不正确。您可以阅读插件的安装部分来修复此错误。然后阅读关于如何使用插件。只要按照指示做，你就会没事的。