Warning: mysqli_stmt::bind_param(): Number of variables doesn't match number of parameters in prepared statement [duplicate]

问题

I receive the following error:

Warning: mysqli_stmt::bind_param(): Number of variables doesn't match number of parameters in prepared statement

I am having trouble binding and executing the prepare statement. The connection to the database is succesfully established and it does manage to insert it into the database with the initial value of ?

Below is the code:

// Set up the query
$insert = "INSERT INTO record_user (ip,country,address,stack,skills,employment_type,city_selection,landing_time,submission_time,time_spent) 
VALUES ('?','?','?','?','?','?','?','?','?','?')";


// Prepare the statement
$insert = $con->prepare($insert);

// Bind the statement
$insert->bind_param("ssssssssss", $user_ip, $country, $location, $stack, $skills, $employment, $city, $landing_time, $submission_time, $time_spent);

// Execute the statement
$insert->execute();

// Close the statement connection
$insert->close();

// Close the database connection
$con->close();

回答1:

Lose the quotes around ? and use 10 params instead of 11

Instead of this:

$insert = "INSERT INTO record_user (ip,country,address,stack,skills,employment_type,city_selection,landing_time,submission_time,time_spent) 
VALUES ('?','?','?','?','?','?','?','?','?','?')";
$insert = $con->prepare($insert);
$insert->bind_param("ssssssssss", $user_ip, $country, $location, $stack, $skills, $employment, $city, $landing_time, $submission_time, $time_spent);

Try this:

$insert = "INSERT INTO record_user (ip,country,address,stack,skills,employment_type,city_selection,landing_time,submission_time,time_spent)
VALUES (?,?,?,?,?,?,?,?,?,?)";
$insert = $con->prepare($insert);
$insert->bind_param("ssssssssss", $user_ip, $country, $location, $stack, $skills, $employment, $city, $landing_time, $submission_time, $time_spent);

回答2:

Your prepared query doesn't have any placeholders. You are inserting 10 literal ? characters into your database.

You need to lose the quotes around the ?s:

$insert = "INSERT INTO record_user (ip,country,address,stack,skills,employment_type,city_selection,landing_time,submission_time,time_spent)
    VALUES (?,?,?,?,?,?,?,?,?,?)";

来源：https://stackoverflow.com/questions/32911663/warning-mysqli-stmtbind-param-number-of-variables-doesnt-match-number-of

标签

php

mysql

sql-server

mysqli