PHP Check duplicate data and Execute if not <p>I had a trouble with my PHP Msyql Check data. Source will be see below :</p> <pre><code>$cek_saldo=mysql_num_rows(mysql_query ("SELECT badge_id, bulan, jns_saldo FROM t_saldo WHERE badge_id='$badge_id' AND bulan='Januari' AND jns_saldo='Tabungan Wajib'")); if ($cek_saldo &gt; 0) { include ("manage_saldo.php"); echo "&lt;div class='emp'&gt;Saldo already added.&lt;/div&gt;"; } else { Save query data. } </code></pre> <p>I example :<br> jns_saldo is "Tabungan Wajib"<br> Badge ID is 165520<br> Bulan is Januari</p> <p>So if the example data same with in the table, then give the message "Saldo already added.". If not, PHP execute to else statement, that's save the data.</p>