How can we find the number of rows in a result set using PHP?

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PHP | Find the number of rows in a result set

Bellow code is use for the same

$sql = "SELECT * FROM table1";
$result = mysql_query($sql, $db_link);
$num_rows = mysql_num_rows($result);
echo $num_rows;

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How can we find the number of rows in a result set using PHP?

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