Get `Warning: mysqli_real_escape_string()` after update database - php

Question

I try to make my custom code to update data to my custom database table
after I send the data I get:
Warning: mysqli_real_escape_string() expects parameter 2 to be string,
array given in .../wp-includes/wp-db.php on line 1156
My table structure is:
table name: wp_wlm_user_options
column names: ID, user_id, option_name, option_value
My code is:
if (isset($_POST['submit'])) {
$user_id = $_POST['user_id'];
$table = 'wp_wlm_user_options';
$meta = array();
foreach ($wlm_user_info as $key => $value) {
$get_meta = $value['option_name'];
array_push($meta, $get_meta);
}
//var_dump($meta);
$value = array(
'custom_firstname' => $_POST['first_name'],
'custom_lastname' => $_POST['last_name'],
'custom_text_dateofbirth' => $_POST['text_dateofbirth'],
'custom_radio_gender' => $_POST['radio_gender'],
'custom_landlinephone' => $_POST['landlinephone'],
'custom_GoogleHangoutsId' => $_POST['GoogleHangoutsId']
);
$format = array(
'%s',
'%s'
);
//print_r($meta,$value);
$data = array(
'user_id' => $user_id,
'option_name' => $meta,
'option_value' => maybe_serialize($value)
);
$format = array('%d','%s','%s');
$where = array(
'user_id' => $user_id,
'option_name' => $meta
);
$x = $wpdb->update($table, $data, $where, $format);
//$x = $wpdb->update($table, $data, $where);
if($x){
echo '<h1>data has been save</h1>' ;
}
Can anyone tell me what is wrong with this?

Answer 1

Due to your poor information we can only guess.
You might want something like this:
if (isset($_POST['submit']))
{
$user_id = $_POST['user_id'];
$table = 'wp_wlm_user_options';
$values = array(
'custom_firstname' => $_POST['first_name' ],
'custom_lastname' => $_POST['last_name' ],
'custom_text_dateofbirth' => $_POST['text_dateofbirth'],
'custom_radio_gender' => $_POST['radio_gender' ],
'custom_landlinephone' => $_POST['landlinephone' ],
'custom_GoogleHangoutsId' => $_POST['GoogleHangoutsId']
);
$format = array('%s');
$whereformat = array('%d','%s');
foreach($values as $key => $val)
{
$data = array(
'option_value' => maybe_serialize($val)
);
$where = array(
'user_id' => $user_id,
'option_name' => $key
);
$num_rows = $wpdb->update($table, $data, $where, $format, $whereformat);
if($num_rows !== false){
echo "<h1>$key has been saved</h1>" ;
}
}
};
The code above does multiple updates mapping the data to option_name and option_value for each update() invocation. You don't need to update fields of the WHERE clause with unchanged values.
You can find the official documentation on wordpress.org