PHP高级检索功能的实现以及动态拼接sql。完成的功能有：可以单独根据一个条件查询，也可以通过多个条件综合查询，难点在于动态拼接sql。
完成的效果
总画面
单独根据姓名模糊查询
单独根据性别查询
根据多个条件综合查询
前台页面代码
<form action="" method="post"> <labal>姓名:</labal> <input style="width:105px" type="text" name="search_name" id="search_name" placeholder="姓名">   <labal>性别:</labal> <input type="radio" name="search_sex" id="man" value="0">男 <input type="radio" name="search_sex" id="women" value="1">女   <labal>年龄:</labal><input style="width:105px" type="text" name="search_age" id="add_age"placeholder="年龄">   <labal>邮箱:</labal><input style="width:150px" type="text" name="search_emAIl" id="search_email" placeholder="邮箱"> <input id="b" name="submit" style="width:60px" type="submit" value="检索"> </form>
后台处理代码
//接收用户输入的数据$name = $sex = $age = $email = "";if (isset($_POST['submit'])) {
if (isset($_POST['search_name'])) {
$name = $_POST['search_name'];
}
if (isset($_POST['search_sex'])) {
$sex = $_POST['search_sex'];
}
if (isset($_POST['search_age'])) {
$age = $_POST['search_age'];
}
if (isset($_POST['search_email'])) {
$email = $_POST['search_email'];
}//执行检索sql$search_sql = $myTest->searchData($name,$sex,$age,$email);$result = $myTest->sqlRun($search_sql);
动态拼接sql
public function searchData($name,$sex,$age,$email){
Switch ($name) {
//未输入姓名
case null:
$name_info='';
break;
//根据姓名模糊查询
default:
$name_info=" and name LIKE '%".$name."%'";
break;
}
switch ($sex) {
//未输入性别
case null:
$sex_info='';
break;
//根据性别准确查询
default:
$sex_info=' and sex='.$sex;
break;
}
switch ($age) {
//未输入年龄
case null:
$age_info='';
break;
//根据年龄准确查询
default:
$age_info=' and age='.$age;
break;
}
switch ($email) {
//未输入邮箱
case null:
$email_info='';
break;
//根据邮箱模糊查询
default:
$email_info=" and email LIKE '%".$email."%'";
break;
}$search_sql='SELECT * FROM users WHERE 1=1'.$name_info.$sex_info.$age_info.$email_info;'';return $search_sql;
}
