我有搜索表.在这里多个领域.有时我将使用一个字段提交表单,有时将使用两个字段提交表单,有时使用多个字段值.
if (isset($_POST['search'])) {
$projectName = $_POST['pName'];
$clientId = $_POST['s_by_clientName'];
$departmentId = $_POST['s_by_department'];
$statusName = $_POST['s_by_status'];
if (!empty($projectName))
{
$searchSql = mysql_query("select * from project_list where projectName='$projectName'");
}
if (!empty($clientId))
{
$searchSql = mysql_query("select * from project_list where client_id='$clientId'");
}
if (!empty($departmentId))
{
$searchSql = mysql_query("select * from project_list where department_id='$departmentId'");
}
if (!empty($statusName))
{
$searchSql = mysql_query("select * from project_list where status='$statusName'");
}
}
这些查询仅用于按单个字段搜索.
如何进行按一个或多个字段值执行搜索的查询
可能吗？？
解决方法:
在查询变量中使用串联
$searchSql ="select * from project_list where 1=1 ";
if (isset($_POST['search'])) {
$projectName = $_POST['pName'];
$clientId = $_POST['s_by_clientName'];
$departmentId = $_POST['s_by_department'];
$statusName = $_POST['s_by_status'];
if (!empty($projectName))
{
$searchSql. = " AND projectName='$projectName'";
}
if (!empty($clientId))
{
$searchSql. = " AND client_id='$clientId'";
}
if (!empty($departmentId))
{
$searchSql. = " AND department_id='$departmentId'";
}
if (!empty($statusName))
{
$searchSql. = " AND status='$statusName'";
}
}
$result=mysql_query($searchSql);
注意：mysql_query()在PHP 5.5中已被弃用,在PHP 7中已被删除.请更新以使用PDO的mysqli库.
标签：mysql,php
来源： https://codeday.me/bug/20191118/2030344.html
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