当我致电var_dump(function_exists('mysqli_connect'))时，它返回bool(false)而我的mysqli_connect功能无效eventhough I checked mysqli in the cpanel。这是否意味着mysqli仍未安装在主机上？我的主人来自a2hosting。
答案 0 :(得分：4)
当你打印出PHP信息时，它对MySQL的说法是什么？
rem renaming the setup.exe because it will be treated separately
ren setup.exe setup._
rem removing the .DEPLOY extension, getting back the original one
for /r %%x in (*.deploy) do ren "%%x" *.
rem signing all files with my certificate
for /r %%x in (*.exe *.dll) do signtool.exe sign /fd sha1 /as /sha1 <MY_CERTIFICATE> "%%x"
for /r %%x in (*.exe *.dll) do signtool.exe sign /fd sha256 /as /sha1 <MY_CERTIFICATE> "%%x"
rem updating the manifest with the new signatures
for /r %%x in (*.manifest) do mage.exe -update "%%x"
rem signing the manifest file
for /r %%x in (*.manifest) do mage.exe -sign "%%x" -ch <MY_CERTIFICATE>
rem putting the .DEPLOY extension in all files renamed previously
for /r %%x in (*.exe *.dll *.config *.cer *.ttf *.ico *.xml *.p7b) do ren "%%x" *.*.deploy
rem getting back setup.exe
ren setup._ setup.exe
rem signing setup.exe file
signtool.exe sign /fd sha1 /as /sha1 <MY_CERTIFICATE> setup.exe
signtool.exe sign /fd sha256 /as /sha1 <MY_CERTIFICATE> setup.exe
rem updating MyApp.Application file
for /r %%x in (*.manifest) do mage.exe -update MyApp.Application -appm "%%x"
rem signing MyApp.Application file
mage.exe -sign MyApp.Application -ch <MY_CERTIFICATE>
rem updating the new signed file to the destiny folder
for /r %%x in (*.application) do xcopy MyApp.Application "%%x" /y
尝试将其关闭再打开。也可以在不同的PHP版本上试用它。否则，这可以在cPanel的范围内尝试，与您的主机联系。 ：）