mysqli_error

Returns a string description of the last error (PHP 5)
string mysqli_error ( mysqli link )

Procedural style:

Object oriented style (property)

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.

范例

例 1265. 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();
?>

例 1266. 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);
?>

上例将输出:

Errormessage: Unknown system variable 'a'