(PHP 5, PHP 7)
mysqli_driver::$report_mode -- mysqli_report — Enables or disables internal report functions
面向对象风格
过程化风格
A function helpful in improving queries during code development and testing. Depending on the flags, it reports errors from mysqli function calls or queries that don't use an index (or use a bad index).
flags
| Name | Description |
|---|---|
MYSQLI_REPORT_OFF |
Turns reporting off |
MYSQLI_REPORT_ERROR |
Report errors from mysqli function calls |
MYSQLI_REPORT_STRICT |
Throw mysqli_sql_exception for errors instead of warnings |
MYSQLI_REPORT_INDEX |
Report if no index or bad index was used in a query |
MYSQLI_REPORT_ALL |
Set all options (report all) |
成功时返回 TRUE， 或者在失败时返回 FALSE。
| 版本 | 说明 |
|---|---|
| 5.3.4 | Changing the reporting mode is now be per-request, rather than per-process. |
| 5.2.15 | Changing the reporting mode is now be per-request, rather than per-process. |
Example #1 面向对象风格
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
/* activate reporting */
$driver = new mysqli_driver();
$driver->report_mode = MYSQLI_REPORT_ALL;
try {
/* this query should report an error */
$result = $mysqli->query("SELECT Name FROM Nonexistingtable WHERE population > 50000");
/* this query should report a bad index */
$result = $mysqli->query("SELECT Name FROM City WHERE population > 50000");
$result->close();
$mysqli->close();
} catch (mysqli_sql_exception $e) {
echo $e->__toString();
}
?>
Example #2 过程化风格
<?php
/* activate reporting */
mysqli_report(MYSQLI_REPORT_ALL);
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
/* this query should report an error */
$result = mysqli_query("SELECT Name FROM Nonexistingtable WHERE population > 50000");
/* this query should report a bad index */
$result = mysqli_query("SELECT Name FROM City WHERE population > 50000");
mysqli_free_result($result);
mysqli_close($link);
?>
Seems not clear but flags *could be combined*, as per other flags.
For example:
<?php
# wannabe noticed about all errors except those about indexes
$driver = new mysqli_driver();
$driver->report_mode = MYSQLI_REPORT_ALL & ~MYSQLI_REPORT_INDEX;
?>