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<mysqli_errnomysqli_escape_string>
Last updated: Mon, 16 Jul 2012

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();
?>

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);
?>

上例将输出:

Errormessage: Unknown system variable 'a'



<mysqli_errnomysqli_escape_string>
 Last updated: Mon, 16 Jul 2012
 
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