lecture9 - CPSC431Lecture9 PHP'sMySQLExtension...

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CPSC431 Lecture 9
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PHP's MySQL Extension mysql_num_rows(): number of rows selected $query = "SELECT name FROM product WHERE price > 15.99"; $result = mysql_query($query); echo "There are ".mysql_num_rows($result)." product(s) priced above \ $15.99."; mysql_affected_rows(): number of rows affected $query = "UPDATE product SET price = '39.99' WHERE price='34.99'"; $result = mysql_query($query); echo "There were ".mysql_affected_rows()." product(s) affected. ";
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PHP's MySQL Extension Deleting data <?php mysql_connect("localhost","webuser","secret"); mysql_select_db("company"); if (isset($_POST['submit'])) { foreach($count=0; $count < count($_POST['rowID']); $count++) { $rowID = $_POST['rowID'][$count]; $query = "DELETE FROM product WHERE rowID='$rowID'"; $result = mysql_query($query); if ((mysql_affected_rows() == 0) || mysql_affected_rows() == -1) { echo "<p>There was a problem deleting some of the selected items.</p>"; exit; } } echo "<p>The selected items were successfully deleted.</p>"; } ?>
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PHP's MySQL Extension mysql_fetch_field() <?php mysql_connect("localhost","webuser","secret"); mysql_select_db("company"); $query = "SELECT * FROM product LIMIT 1";
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