PHP mysqli: autocommit() function
mysqli_autocommit() function / mysqli::autocommit
The mysqli_autocommit() function / mysqli::autocommit turns on or off the auto-commit mode on queries. auto-commit is a property which saves the changes made to database automatically if the mode is on.
Syntax:
Object oriented style
bool mysqli::autocommit ( bool $mode )
Procedural style
bool mysqli_autocommit ( mysqli $link , bool $mode )
Parameter:
Name | Description | Required/Optional |
---|---|---|
link | A link identifier returned by mysqli_connect() or mysqli_init(). | Required |
mode | Whether to turn on auto-commit or not. | Required |
Usage: Procedural style
mysqli_autocommit(connection,mode);
Parameter:
Name | Description | Required/Optional |
---|---|---|
connection | Specifies the MySQL connection to use. | Required |
mode | FALSE turns auto-commit off. TRUE turns auto-commit on (and commits any waiting queries) | Required |
Return value:
Returns TRUE on success or FALSE on failure.
Version: PHP 5, PHP 7
Example of object oriented style:
<?php
$mysqli = new mysqli("localhost", "user1", "datasoft123", "hr");
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
/* turn autocommit on */
$mysqli->autocommit(TRUE);
if ($result = $mysqli->query("SELECT @@autocommit")) {
$row = $result->fetch_row();
printf("Autocommit is %s\n", $row[0]);
$result->free();
}
/* close connection */
$mysqli->close();
?>
Output:
Autocommit is 1
Example of procedural style:
<?php
$link = mysqli_connect("localhost", "user1", "datasoft123", "hr");
if (!$link) {
printf("Can't connect to localhost. Error: %s\n", mysqli_connect_error());
exit();
}
/* turn autocommit on */
mysqli_autocommit($link, TRUE);
if ($result = mysqli_query($link, "SELECT @@autocommit")) {
$row = mysqli_fetch_row($result);
printf("Autocommit is %s\n", $row[0]);
mysqli_free_result($result);
}
/* close connection */
mysqli_close($link);
?>
Output:
Autocommit is 1
See also
Previous: affected_rows
Next: begin_transaction
PHP: Tips of the Day
PHP: How to generate a random, unique, alphanumeric string for use in a secret link?
Security Notice: This solution should not be used in situations where the quality of your randomness can affect the security of an application. In particular, rand() and uniqid() are not cryptographically secure random number generators. See Scott's answer for a secure alternative.
If you do not need it to be absolutely unique over time:
md5(uniqid(rand(), true))
Otherwise (given you have already determined a unique login for your user):
md5(uniqid($your_user_login, true))
Ref : https://bit.ly/31fd9wa
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