mysqli - Display MySql database errors in php -

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this question exact duplicate of:

how can mysql database errors 'trying insert duplicate record' captured , displayed in php?

get error when inserting -- warning: mysqli_error() expects parameter 1 mysqli, boolean.

in case know i'm getting because i'm trying insert duplicate record. php/mysql not give specific errors? display on screen end user understand .

function querydb($sql){          $con=mysqli_connect("localhost","my_user","my_password","my_db");              // check connection             if (mysqli_connect_errno()) {               echo "failed connect  database: " . mysqli_connect_error();               return 0;             }              $result = mysqli_query($con,$sql)  or die("error in query.." . mysqli_error($result));             $con->close();              return $result; }

first turn on error reporting. add on top of file:

error_reporting(e_all);

then if log doesn't make sense you, try writing sql , pasting phpmyadmin, it'll show different error (if it's being caused sql).


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