mysqli_fetch_array() expects parameter 1 to be mysqli_result, boolean it is OK on the local side, but such an error occurs after ubuntu my local side and ubuntu both install php7 . The difference is that it is possible that I am 7.2.2 ubuntu is 7, but ...
want to check the hypothesis. I want the counterparty to access my database via php curl what can I do this? Is there a template you can refer to? this is due to the fact that the host is in parallel with mysql and all the mysql data are managed cent...
$con = new mysqli($servername, $username, $password, $mysqldb); $fineLog = $con->query( "SELECT * FROM `error_report` " ); while ($row = mysqli_fetch_array($fineLog)) { echo $row[ errno ]; } I don t know why this error occurred my...
my mysql database has two pieces of data when I print_r, it looks like this: [{"errno":"1","errstr":"2","errfile":"3","errline":"4"},{"errno":"12",...
the api I am talking to now is a request from others. is to use curl to catch the opposite party http. I give it to the opposite party json , and then the opposite party gives back to me json, and then I show it (using mongodb, nodejs) ). it s just t...
$selectTip = $pdo->query("SELECT * FROM `tips_rate` WHERE `tip_id` = ".$row[ id ]." " ); $selecttotal = mysqli_num_rows($selectTip); $rate = $pdo->query("SELEC...
even in front-end asymmetric encryption, there must be a public key or private key exposed to the client. So asymmetric encryption can only prevent content from being intercepted and read in the transport layer (but others can use the same data request f...
Why look at other people s source code and find that other people s class supports this way of writing? ...
nginx manages static pages, and then forwards requests for data pages to nodejs, why you can only get index.html? how should the page data request be forwarded to the nodejs--8080 port? there should be no need for a firewall to open it worker_proce...
in practice, we encountered the use of vector < string > as a local variable to temporarily store a large number of string, and found that a large amount of memory was not released after running. After taking a look at the related problems, it is general...
< IfModule mpm_prefork_module > StartServers 5 MinSpareServers 5 MaxSpareServers 10 MaxClients 30 MaxRequestsPerChild 0 < IfModule > I don t know why cpu usage is always high. After stopping nginx, cpu drops imme...