num_rows in mysql code example

Example 1: php 7 count result in database

mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$link = mysqli_connect("host", "username", "password","db_name");
mysqli_set_charset($link, "utf8mb4");

$result = mysqli_query($link, "SELECT count(*) FROM blackandwhite");
$num_rows = mysqli_fetch_row($result)[0];

echo "$num_rows Rows\n";

Example 2: mysql num rows

//number of rows retrieved from a query
<?php

$link = mysql_connect("localhost", "mysql_user", "mysql_password");
mysql_select_db("database", $link);

$result = mysql_query("SELECT * FROM table1", $link);
$num_rows = mysql_num_rows($result);

echo "$num_rows Rows\n";

?>