In our site design process, often use multi-conditional query, the source of this article is a second-hand housing query example. In this case, we are going to be able to find the information that we need through a number of conditions, such as location, property type, house price, housing area and information release date. The following is the implementation process.
Query Condition Interface (abbreviated):
Query file (search.php)
First, generate the query statement:
$c
$db =mysql_select_db ("Lingyun");
$query = "SELECT * from message where tradetype= '". $tradetype. "'"; Types of transactions, such as rental, sale
$SQL = $SQL. "Wuye= '". $wuye. "'";
if ($housetype! = "Unlimited") {
$query. = "&& housetype=". $housetype. "'"; Housing type, such as two rooms, one hall, three rooms, two rooms
}
if ($degree! = "Unlimited") {
$query. = "&& degree=". $degree. "'"; New and Old degree
}
if ($wuye! = "Unlimited") {
$query. = "&& wuye=". $wuye. "'"; Property types such as housing, shops
}
if ($price 2!= "") {
Switch ($price 1) {
Case "Greater than":
$query. = "&& price>". $price 2. "'"; Price
Break
Case "equals":
$query. = "&& price=". $price 2. "'";
Break
Case "less than":
$query. = "&& price<". $price 2. "'";
Break
}
}
if ($area 2!= "") {
Switch ($area 1) {
Case "Greater than":
$query. = "&& area>". $area 2. "'"; Area
Break
Case "equals":
$query. = "&& area=". $area 2. "'";
Break
Case "less than":
$query. = "&& area<". $area 2. "'";
Break
}
}
Switch ($pubdate) {//release date
Case "within the Week":
$query. = "&& to_days (Now ())-to_days (date) <=7";
Break
Case "within one months":
$query. = "&& to_days (Now ())-to_days (date) <=30";
Break
Case "within three months":
$query. = "&& to_days (Now ())-to_days (date) <=91";
Break
Case "Within six months":
$query. = "&& to_days (Now ())-to_days (date) <=183";
Break
}
if ($address! = "") {
$query. = "&& address like '% $address% '"; Address
}
if (! $page) {
$page = 1;
}
?>
Second, output query results:
if ($page) {
$page _size=20;
$result =mysql_query ($query);
# $message _count=mysql_result ($result, 0, "total");
$message _count=10;
$page _count=ceil ($message _count/$page _size);
$offset = ($page-1) * $page _size;
$query = $query. "ORDER BY date desc limit $offset, $page _size";
$result =mysql_query ($query);
if ($result) {
$rows =mysql_num_rows ($result);
if ($rows!=0) {
while ($myrow =mysql_fetch_array ($result)) {
echo "";
echo "";
echo "$myrow [id] $myrow [tradetype] $myrow [address] $myrow [Wuye] ($myrow [Housetype]) [$myrow [Date]] ";
echo "";
echo "Detailed content";
echo "";
}
}
else echo "
No records were found to meet your criteria.";
}
$prev _page= $page-1;
$next _page= $page +1;
echo "";
echo "First". $page. " /". $page _count." Page ";
if ($page <=1) {
echo "| first page |";
}
else{
echo "| first page |";
}
echo "";
if ($prev _page<1) {
echo "| prev |";
}
else{
echo "| prev |";
}
echo "";
if ($next _page> $page _count) {
echo "| next page |";
}
else{
echo "| next page |";
}
echo "";
if ($page >= $page _count) {
echo "| last page |";
}
else{
echo "| last page |";
}
echo "";
}
else{
echo "
There are no housing rental information!
";
}
echo " ";
?>
If there is any problem in the use of the process, please contact me (yk_lingyun@21cn.com), welcome correction!
"The copyright of this article is owned by the author and house Orso near net, if need to reprint, please specify the author and source"
The above describes the commercial loan to the Provident Fund loan conditions A simple implementation of multi-conditional query, including the commercial loan to Provident Fund loan conditions of the content, I hope that the PHP tutorial interested in a friend helpful.
