PHP mysqli_num_rows() Function

In this chapter you will learn:

Definition for PHP mysqli_num_rows() Function
Syntax for PHP mysqli_num_rows() Function
Parameter for PHP mysqli_num_rows() Function
Return for PHP mysqli_num_rows() Function
Example - returns the number of rows in a result set
Example - Object oriented style

Definition

The mysqli_num_rows() function returns the number of rows in a result set.

Syntax

PHP mysqli_num_rows() Function has the following syntax.

Object oriented style

int $mysqli_result->num_rows;

Procedural style

int mysqli_num_rows ( mysqli_result $result )

Parameter

Parameter	Description
result	Result set identifier returned by mysqli_query(), mysqli_store_result() or mysqli_use_result()

Return

Returns number of rows in the result set.

If the number of rows is greater than MAXINT, the number will be returned as a string.

Example

The following code returns the number of rows in a result set.


<?php/* j  a v  a  2 s . c o  m*/
$con=mysqli_connect("localhost","my_user","my_password","my_db");
if (mysqli_connect_errno($con)){
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

$sql="SELECT Lastname FROM Persons";

if ($result=mysqli_query($con,$sql)){
  // Return the number of rows in result set
  $rowcount=mysqli_num_rows($result);
  printf("Result set has %d rows.\n",$rowcount);

  mysqli_free_result($result);
}

mysqli_close($con);
?>

Example 2


<?php//from   ja v a 2 s.c o  m
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

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

if ($result = $mysqli->query("SELECT Code, Name FROM Country ORDER BY Name")) {

    /* determine number of rows result set */
    $row_cnt = $result->num_rows;

    printf("Result set has %d rows.\n", $row_cnt);

    $result->close();
}

$mysqli->close();
?>