Una pregunta, si tengo este código para "pillar" datos de la base de datos, cómo puedo hacer para que si no exista muestre el texto que yo quiera.
Mi codigo:
Código PHP:
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "")
{
$theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
$theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);
switch ($theType) {
case "text":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "long":
case "int":
$theValue = ($theValue != "") ? intval($theValue) : "NULL";
break;
case "double":
$theValue = ($theValue != "") ? "'" . doubleval($theValue) . "'" : "NULL";
break;
case "date":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "defined":
$theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
break;
}
return $theValue;
}
}
mysql_select_db($database_ffextremo_cms, $ffextremo_cms);
$query_site = "SELECT sitename, sitedesc, siteauthor, sitekeywords, siteurl, siteys, siteyf FROM site";
$site = mysql_query($query_site, $ffextremo_cms) or die(mysql_error());
$row_site = mysql_fetch_assoc($site);
$totalRows_site = mysql_num_rows($site);
$colname_read = "-1";
if (isset($_GET['id'])) {
$colname_read = (get_magic_quotes_gpc()) ? $_GET['id'] : addslashes($_GET['id']);
}
mysql_select_db($database_ffextremo_cms, $ffextremo_cms);
$query_read = sprintf("SELECT * FROM `read` WHERE id = %s", GetSQLValueString($colname_read, "int"));
$read = mysql_query($query_read, $ffextremo_cms) or die(mysql_error());
$row_read = mysql_fetch_assoc($read);
$totalRows_read = mysql_num_rows($read);
$colname_comments = "-1";
if (isset($_GET['id'])) {
$colname_comments = (get_magic_quotes_gpc()) ? $_GET['id'] : addslashes($_GET['id']);
}
mysql_select_db($database_ffextremo_cms, $ffextremo_cms);
$query_comments = sprintf("SELECT * FROM comments WHERE `for` = %s ORDER BY id ASC", GetSQLValueString($colname_comments, "text"));
$comments = mysql_query($query_comments, $ffextremo_cms) or die(mysql_error());
$row_comments = mysql_fetch_assoc($comments);
$totalRows_comments = mysql_num_rows($comments);
?>