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View error mysql php

mysqli_ connect_ errno( ) - Returns the error code from last connect call; mysqli_ connect_ error( ) - Returns a string. throw new Exception( " MySQL error $ mysqli- > error < br> Query: < br> $ query", $ msqli- > errno) ;. php $ con= mysqli_ connect( " localhost", " my_ user", " my_ password", " my_ db" ) ; / / Check connection if ( mysqli_ connect_ errno( ) ) { echo " Failed to connect to MySQL : ". mysqli_ connect_ error( ) ; } / / Perform a query, check for e this: mysqli_ query( $ this- > db_ link, $ query) or die( mysqli_ error( $ this- > db_ link ) ) ; # mysqli_ query( $ link, $ query) returns 0 if there' s an error. # mysqli_ error( $ link) returns a string with the last error message. You can also LECT, SHOW, DESCRIBE や EXPLAIN 文、 その他結果セットを返す文では、 mysql_ query( ) は成功した場合に resource を返します。 エラー時には FALSE を. MySQL に送られたクエリと返ってきたエラーをそのまま表示します。 デバッグに便利 です。 if (! See also MySQL: choosing an API guide and related FAQ for more information. Note that this function only returns the error code from the most recently executed MySQL function ( not including mysql_ error( ) and mysql_ errno( ) ), so if you. この関数が返すのは、 直近に実行された MySQL 関数( mysql_ error( ) と mysql_ errno ( ) は除く) のエラー文字列だけであること. Most often, the output message from MySQL doesn' t let you see enough of the query in the error message to let you see. You need to set the error mode attribute PDO: : ATTR_ ERRMODE to PDO: : ERRMODE_ EXCEPTION. And since you expect the exception to be thrown by the prepare( ) method you should disable the. You can always debug using this at the top of your php page:. Have you tried $ q = $ conn- > query( $ sql) or die( $ conn- > error( ) ) ;?

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    View error mysql

    Crackers can gain a lot of insight by purposefully feeding bad input and reading the error. You do mysql_ error( ) immediately after the query, because it will show a message if the query was wrong,. After research it appeared that the problem has got nothing to do with PHP itself, but with mysql server configuration. Just simply add or die( mysqli_ error( $ db) ) ; at the end of your query, this will print the mysqli error. As a side note I' d say you are at risk of mysql injection, check here How can I prevent SQL injection in PHP?