mysqli::$info

mysqli_info

(PHP 5)

mysqli::$info -- mysqli_info — Retrieves information about the most recently executed query

说明

面向对象风格

string $mysqli->info ;

过程化风格

string mysqli_info ( mysqli $link )

The mysqli_info() function returns a string providing information about the last query executed. The nature of this string is provided below:

**Possible mysqli_info return values**
Query type	Example result string
INSERT INTO...SELECT...	Records: 100 Duplicates: 0 Warnings: 0
INSERT INTO...VALUES (...),(...),(...)	Records: 3 Duplicates: 0 Warnings: 0
LOAD DATA INFILE ...	Records: 1 Deleted: 0 Skipped: 0 Warnings: 0
ALTER TABLE ...	Records: 3 Duplicates: 0 Warnings: 0
UPDATE ...	Rows matched: 40 Changed: 40 Warnings: 0

Note:

Queries which do not fall into one of the preceding formats are not supported. In these situations, mysqli_info() will return an empty string.

参数

link: 仅以过程化样式：由 mysqli_connect() 或 mysqli_init() 返回的链接标识。

返回值

A character string representing additional information about the most recently executed query.

范例

Example #1 $mysqli->info example

面向对象风格

  <?php
$mysqli  = new  mysqli ( "localhost" ,  "my_user" ,  "my_password" ,  "world" );

 
 if ( mysqli_connect_errno ()) {
     printf ( "Connect failed: %s\n" ,  mysqli_connect_error ());
    exit();
}

 $mysqli -> query ( "CREATE TEMPORARY TABLE t1 LIKE City" );

 
 $mysqli -> query ( "INSERT INTO t1 SELECT * FROM City ORDER BY ID LIMIT 150" );
 printf ( "%s\n" ,  $mysqli -> info );

 
 $mysqli -> close ();
 ?>

过程化风格

  <?php
$link  =  mysqli_connect ( "localhost" ,  "my_user" ,  "my_password" ,  "world" );

 
 if ( mysqli_connect_errno ()) {
     printf ( "Connect failed: %s\n" ,  mysqli_connect_error ());
    exit();
}

 mysqli_query ( $link ,  "CREATE TEMPORARY TABLE t1 LIKE City" );

 
 mysqli_query ( $link ,  "INSERT INTO t1 SELECT * FROM City ORDER BY ID LIMIT 150" );
 printf ( "%s\n" ,  mysqli_info ( $link ));

 
 mysqli_close ( $link );
 ?>

以上例程会输出：

Records: 150  Duplicates: 0  Warnings: 0

参见

mysqli_affected_rows() - Gets the number of affected rows in a previous MySQL operation
mysqli_warning_count() - Returns the number of warnings from the last query for the given link
mysqli_num_rows() - Gets the number of rows in a result

用户评论:

[#1] user at biglake dot com [2010-12-14 18:43:47]

Might save someone some time...

<?php $prototype='Rows matched: 0 Changed: 1 Warnings: 2'; list($matched, $changed, $warnings) = sscanf($prototype, "Rows matched: %d Changed: %d Warnings: %d"); ?>