PHP mysqli: set_charset() function
mysqli_set_charset() function / mysqli::set_charset
The mysqli_set_charset() function / mysqli::set_charset specifies the default character set to be used when sending data from and to the database server.
Note: For this function to work on a Windows platform, you need MySQL client library 4.1.11 or above (for MySQL 5.0 you need 5.0.6 or above).
Syntax:
Object oriented style
bool mysqli::set_charset ( string $charset )
Procedural style
bool mysqli_set_charset ( mysqli $link , string $charset )
Parameter:
Name | Description | Required/Optional | |
---|---|---|---|
link | A link identifier returned by mysqli_connect() or mysqli_init() | Required for procedural style only and Optional for Object oriented style | |
charset | The charset to be set as default. | Required |
Usage: Procedural style
mysqli_set_charset(connection,charset);
Parameter:
Name | Description | Required/Optional |
---|---|---|
connection | Specifies the MySQL connection to use | Required |
charset | Specifies the default character set | 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");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
printf("Initial character set: %s\n", $mysqli->character_set_name());
/* change character set to utf8 */
if (!$mysqli->set_charset("utf8")) {
printf("Error loading character set utf8: %s\n", $mysqli->error);
exit();
} else {
printf("Current character set: %s\n", $mysqli->character_set_name());
}
$mysqli->close();
?>
Output:
Initial character set: latin1 Current character set: utf8
Example of the Procedural style
<?php
$link = mysqli_connect('localhost', 'user1', 'datasoft123', 'hr');
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
printf("Initial character set: %s\n", mysqli_character_set_name($link));
/* change character set to utf8 */
if (!mysqli_set_charset($link, "utf8")) {
printf("Error loading character set utf8: %s\n", mysqli_error($link));
exit();
} else {
printf("Current character set: %s\n", mysqli_character_set_name($link));
}
mysqli_close($link);
?>
Output:
Initial character set: latin1 Current character set: utf8
Example:
<?php
$con=mysqli_connect("localhost","user1","datasoft123","hr");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
// Change character set to utf8
mysqli_set_charset($con,"utf8");
mysqli_close($con);
?>
Sample Output:
Initial character set: latin1 Current character set: utf8
See also
Previous: select_db
Next: set_local_infile_default
PHP: Tips of the Day
PHP: How to generate a random, unique, alphanumeric string for use in a secret link?
Security Notice: This solution should not be used in situations where the quality of your randomness can affect the security of an application. In particular, rand() and uniqid() are not cryptographically secure random number generators. See Scott's answer for a secure alternative.
If you do not need it to be absolutely unique over time:
md5(uniqid(rand(), true))
Otherwise (given you have already determined a unique login for your user):
md5(uniqid($your_user_login, true))
Ref : https://bit.ly/31fd9wa
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