PHP/MySQL的转换阵列WHERE子句

Question

转换这个数组

array("user_id"=>"8", "product_id"=>"35", "quantity"=>"1") 

查询

select * from tbl_name where user_id='8' and product_id='35' and quantity='1' 

以及如何使用笨活动记录功能，PHP中提供的任何方式或库？

Answer 1

使用implode和array_map。

<?php 
$where_arr = array("user_id"=>"8", "product_id"=>"35", "quantity"=>"1"); 
$where = implode(' AND ', array_map(function ($value, $key) { return "`". $key . "`='" . $value . "'"; }, $where_arr, array_keys($where_arr))); 

OR array_walk

$where_arr = array("user_id"=>"8", "product_id"=>"35", "quantity"=>"1"); 
array_walk($where_arr, function (&$value, $key) { $value = "`". $key . "`='" . $value . "'"; }); 
$where = implode(' AND ', $where_arr); 

创建查询

$query = 'SELECT * FROM `tbl_name` WHERE '.$where; 

$query输出：

SELECT * FROM `tbl_name` WHERE `user_id`='8' AND `product_id`='35' AND `quantity`='1' 

笨

在你的控制，获得数据

$where_arr = array("user_id"=>"8", "product_id"=>"35", "quantity"=>"1"); 
$results['products'] = $this->db->get_where('tbl_name', $where_arr)->result(); 

$this->load->view('your_view_name', $results); 

现在你可以在你的视图中使用$products变量，它找到的所有产品。

Answer 2

试试这个

$array = array("user_id"=>"8","product_id"=>"35","quantity"=>"1"); 
$clauses = array(); 
foreach ($array as $field => $value) { 
    $clauses[] = "$field='$value'"; 
} 
$where_clause = join(" and ",$clauses); 
echo "select * from tbl_name where " . $where_clause;