object(mysqli)#1 (18) {
  ["affected_rows"]=>
  int(-1)
  ["client_info"]=>
  string(13) "mysqlnd 8.5.7"
  ["client_version"]=>
  int(80507)
  ["connect_errno"]=>
  int(0)
  ["connect_error"]=>
  NULL
  ["errno"]=>
  int(0)
  ["error"]=>
  string(0) ""
  ["error_list"]=>
  array(0) {
  }
  ["field_count"]=>
  int(0)
  ["host_info"]=>
  string(25) "Localhost via UNIX socket"
  ["info"]=>
  NULL
  ["insert_id"]=>
  int(0)
  ["server_info"]=>
  string(16) "10.11.15-MariaDB"
  ["server_version"]=>
  int(101115)
  ["sqlstate"]=>
  string(5) "00000"
  ["protocol_version"]=>
  int(10)
  ["thread_id"]=>
  int(75540)
  ["warning_count"]=>
  int(0)
}


<form method="GET" action="kakei.php">
    <input type=date name=ymd>
    <!--<input type=number name=year>年
    <br>
    <input type=number name=month>月
    <br>
    <input type=number name=day>日-->
    <br>
    内容<input type="text" name="content">
    <br>
    カテゴリー<input type="text" name="category">
    <br>
    支出<input type="number" name="payment">
    <input type="submit" value="送信">
    <br>
</form>



<br />
<b>Warning</b>:  Undefined variable $year in <b>/home/murakami/public_html/db_test/kakei.php</b> on line <b>46</b><br />
<br />
<b>Warning</b>:  Undefined variable $month in <b>/home/murakami/public_html/db_test/kakei.php</b> on line <b>46</b><br />
<br />
<b>Warning</b>:  Undefined variable $day in <b>/home/murakami/public_html/db_test/kakei.php</b> on line <b>46</b><br />
<br />
<b>Warning</b>:  Undefined variable $content in <b>/home/murakami/public_html/db_test/kakei.php</b> on line <b>46</b><br />
<br />
<b>Warning</b>:  Undefined variable $category in <b>/home/murakami/public_html/db_test/kakei.php</b> on line <b>46</b><br />
<br />
<b>Warning</b>:  Undefined variable $payment in <b>/home/murakami/public_html/db_test/kakei.php</b> on line <b>46</b><br />
<br><br />
<b>Fatal error</b>:  Uncaught mysqli_sql_exception: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ' , , '', '', )' at line 1 in /home/murakami/public_html/db_test/kakei.php:51
Stack trace:
#0 /home/murakami/public_html/db_test/kakei.php(51): mysqli-&gt;query()
#1 {main}
  thrown in <b>/home/murakami/public_html/db_test/kakei.php</b> on line <b>51</b><br />