mysqli_error
(PHP 5)
mysqli_error -- Returns a string description of the last error
Description
Procedural style:
string
mysqli_error ( mysqli link )
Object oriented style (property)
class
mysqli {
string error
}
The mysqli_error() function is identical to the corresponding
mysqli_errno() function in every way, except instead of returning
an integer error code the mysqli_error() function will return
a string representation of the last error to occur for the database connection
represented by the link parameter. If no error has occured,
this function will return an empty string.
返回值
A string that describes the error. An empty string if no error occurred.
例
例子 1. Object oriented style
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
if (!$mysqli->query("SET a=1")) {
printf("Errormessage: %s\n", $mysqli->error);
}
/* close connection */
$mysqli->close();
?>
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例子 2. Procedural style
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
if (!mysqli_query($link, "SET a=1")) {
printf("Errormessage: %s\n", mysqli_error($link));
}
/* close connection */
mysqli_close($link);
?>
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上例将输出：
Errormessage: Unknown system variable 'a' |