我有搜索表.在這里多個領域.有時我將使用一個字段提交表單,有時將使用兩個字段提交表單,有時使用多個字段值.

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'");

}

}

這些查詢僅用于按單個字段搜索.

如何進行按一個或多個字段值執行搜索的查詢

可能嗎？？

解決方法:

在查詢變量中使用串聯

$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中已被棄用,在PHP 7中已被刪除.請更新以使用PDO的mysqli庫.

標簽：mysql,php

來源： https://codeday.me/bug/20191118/2030344.html

總結

以上是生活随笔為你收集整理的php为什么搜不到字段,php-通过多个字段搜索.有时一个领域,有时不止一个领域的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。