Introduction
In this article I describe the PHP MySQLi functions mysqli_kill, mysqli_more_result, mysqli_multi_query, mysqli_next_result and mysqli_num_fields. To learn some other MySQLi functions, go to:
- MySQLi Function in PHP: Part 1
- MySQLi Function in PHP: Part 2
- MySQLi Function in PHP: Part 3
- MySQLi Function in PHP: Part 4
- MySQLi Function in PHP: Part 5
- MySQLi Function in PHP: Part 6
- MySQLi Function in PHP: Part 7
- MySQLi Function in PHP: Part 8
PHP mysqli_kill() Function
The PHP MySQLi "mysqli_kill" function asks the server to kill a MySQL thread and this function returns true on success or false on failure.
Syntax
| mysqli_kill(connection,processid) |
Parameter in mysqli_kill function
The parameters of the function are:
| Parameter |
Description |
| connection |
It specifies the MySQL connection to use. |
| processid |
It specifies the thread id returned from the mysqli_thread_id)(). |
Example
An example of the function is:
<?php
$con=mysqli_connect("localhost","root","","mysql");
if (mysqli_connect_error($con))
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$id=mysqli_thread_id($con);
mysqli_kill($con,$id);
mysqli_close($con);
?>
PHP mysqli_more_result() Function
The PHP MySQLi "mysqli_more_result" function checks if there are any more query results from a multi-query and this function returns true on success or false on failure.
Syntax
| mysqli_more_result(connection) |
Parameter in mysqli_more_result function
The parameter of the function is:
| Parameter |
Description |
| connection |
It specifies the MySQL connection to use. |
Example
An example of the function is:
<?php
$con = mysqli_connect("localhost", "root", "", "mysql");
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "SELECT CURRENT_USER();";
$query .= "SELECT id FROM emp";
/* execute multi query */
if (mysqli_multi_query($con, $query)) {
do
{
if ($result = mysqli_store_result($con)) {
while ($row = mysqli_fetch_row($result)) {
printf("%s\n", $row[0]);
echo "</br>";
}
mysqli_free_result($result);
}
/* print divider */
if (mysqli_more_results($con)) {
echo "</br>";
printf("-----------------");
echo "</br>";
}
} while (mysqli_next_result($con));
}
mysqli_close($con);
?>
Output
![mysqli-more-result-function-in-php.jpg]()
PHP mysqli_multi_query() Function
The PHP MySQLi "mysqli_multi_query" function performs a query on the database and this function returns false if the first statement failed.
Syntax
| mysqli_multi_query(connection,query) |
Parameter in mysqli_multi_query function
The parameters of the function are:
| Parameter |
Description |
| connection |
It specifies the MySQL connection to use. |
| query |
It specifies one or more queries, separated with columns. |
Example
An example of the function is:
<?php
$con = mysqli_connect("localhost", "root", "", "mysql");
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "SELECT CURRENT_USER();";
$query .= "SELECT id FROM emp";
/* execute multi query */
if (mysqli_multi_query($con, $query)) {
do
{
if ($result = mysqli_store_result($con)) {
while ($row = mysqli_fetch_row($result)) {
printf("%s\n", $row[0]);
echo "</br>";
}
mysqli_free_result($result);
}
/* print divider */
if (mysqli_more_results($con)) {
echo "</br>";
printf("-----------------");
echo "</br>";
}
} while (mysqli_next_result($con));
}
mysqli_close($con);
?>
Output
![mysqli-more-result-function-in-php.jpg]()
PHP mysqli_next_result() Function
The PHP MySQLi "mysqli_multi_query" function prepares the next result from the multi-query and this function returns true on success or false on failure.
Syntax
| mysqli_next_result(connection) |
Parameter in mysqli_next_result function
The parameter of the function is:
| Parameter |
Description |
| connection |
It specifies the MySQL connection to use. |
Example
An example of the function is:
<?php
$con = new mysqli("localhost", "root", "", "mysql");
if (mysqli_connect_error($con))
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$query = "SELECT id from emp;";
$query .= "SELECT name FROM bank_coust_info";
/* execute multi query */
if ($con->multi_query($query)) {
do
{
/* store first result set */
if ($result = $con->store_result()) {
while ($row = $result->fetch_row()) {
printf("%s\n", $row[0]);
echo "</br>";
}
$result->close();
}
if ($con->more_results()) {
//echo "</br>";
printf("<b>Second table values</b>");
echo "</br>";
}
} while ($con->next_result());
}
$con->close();
?>
Output
![mysqli-next-result-in-php.jpg]()
PHP mysqli_num_fields() Function
The PHP MySQLi "mysqli_num_filelds" function is used to get the number of fields in a result or say this function returns the number of field from a result set.
Syntax
| mysqli_num_filelds(result) |
Parameter in mysqli_num_fields function
The parameter of the function is:
| Parameter |
Description |
| result |
It specifies a result set identifier returned by mysqli_query(). |
Example
An example of the function is:
<?php
$con=mysqli_connect("localhost","root","","mysql");
if (mysqli_connect_errno($con))
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$sql="SELECT id,name FROM emp ORDER BY name";
if ($result=mysqli_query($con,$sql))
{
$fieldcount=mysqli_num_fields($result);
printf("Result set has %d fields.\n",$fieldcount);
mysqli_free_result($result);
}
mysqli_close($con);
?>
Output
![mysqli-num-fields-function-in-php.jpg]()