Htaccess    html   Php    javascript   Asp   css    maths  Past Questions  Practice Tests Online

mysqli rollback function syntax tag tutorial 2013 Donate at flattr Flattr this





Alert! Connect with 10,000 Chating Online. Join Now

Php mysqli rollback () function

Write your php code

 
<?php ?>

Php Result


Your code below



(PHP 5)

mysqli_rollback

(no version information, might be only in CVS)

mysqli->rollback -- Rolls back current transaction

Syntax

bool mysqli_rollback ( mysqli link )

class mysqli {

bool rollback ( void )

}

Rollbacks the current transaction for the database specified by the link parameter.

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example 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();
}

/* disable autocommit */
$mysqli->autocommit(FALSE);

$mysqli->query("CREATE TABLE myCity LIKE City");
$mysqli->query("ALTER TABLE myCity Type=InnoDB");
$mysqli->query("INSERT INTO myCity SELECT * FROM City LIMIT 50");

/* commit insert */
$mysqli->commit();

/* delete all rows */
$mysqli->query("DELETE FROM myCity");

if (
$result = $mysqli->query("SELECT COUNT(*) FROM myCity")) {
    
$row = $result->fetch_row();
    
printf("%d rows in table myCity.\n", $row[0]);
    
/* Free result */
    
$result->close();
}

/* Rollback */
$mysqli->rollback();

if (
$result = $mysqli->query("SELECT COUNT(*) FROM myCity")) {
    
$row = $result->fetch_row();
    
printf("%d rows in table myCity (after rollback).\n", $row[0]);
    
/* Free result */
    
$result->close();
}

/* Drop table myCity */
$mysqli->query("DROP TABLE myCity");

$mysqli->close();
?>

Example 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();
}

/* disable autocommit */
mysqli_autocommit($link, FALSE);

mysqli_query($link, "CREATE TABLE myCity LIKE City");
mysqli_query($link, "ALTER TABLE myCity Type=InnoDB");
mysqli_query($link, "INSERT INTO myCity SELECT * FROM City LIMIT 50");

/* commit insert */
mysqli_commit($link);

/* delete all rows */
mysqli_query($link, "DELETE FROM myCity");

if (
$result = mysqli_query($link, "SELECT COUNT(*) FROM myCity")) {
    
$row = mysqli_fetch_row($result);
    
printf("%d rows in table myCity.\n", $row[0]);
    
/* Free result */
    
mysqli_free_result($result);
}

/* Rollback */
mysqli_rollback($link);

if (
$result = mysqli_query($link, "SELECT COUNT(*) FROM myCity")) {
    
$row = mysqli_fetch_row($result);
    
printf("%d rows in table myCity (after rollback).\n", $row[0]);
    
/* Free result */
    
mysqli_free_result($result);
}

/* Drop table myCity */
mysqli_query($link, "DROP TABLE myCity");

mysqli_close($link);
?>

The above example will output:

0 rows in table myCity.
50 rows in table myCity (after rollback).

Php mysqli rollback Function syntax tag

mysqli rollback php code on this is provided for your study purpose, it will guide you to know how create and design a website using php. use it to practice and train your self online



Php mysqli rollback syntax tutorial

php tutorial guide and code design are for easy learning and programming. The code practice section provided at the top is for practising of this syntax. Use the code section up to practice your php programming online. Learning php is very easy, all you need is to use the examples on this site and practice them to perfect your skills.


Function index

Variables

Expressions

Operators

Control-Structures

Cookies

Array

Date & Time

Directory function

File

Image

Operators

Form data handling

Mathematics operators

Mail

Php Mysql

Network Functions

Strings

php tutorial guides,functions, classes, code examples and tags for creating simple dynamic site to mysql database driven sites
 
 
Htaccess    html   Php    javascript   Asp   css    maths  Past Questions  Practice Tests Online