Call to a member function fetchColumn() on a non-object

首套房定义2022-10-11  16

对非对象上的成员函数fetch column()调用对非对象上的成员函数fetch column()简介:connect MySQL $ RS = $ conn-> by PDO;查询( quotselect count(*)from id = 0 quot;); $ RES = $ conn- gt;查询( quot硒
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