Question

我有以下代码 -

<?php # search.inc
error_reporting(E_ALL); // 
ini_set('display_errors', '1');
include "connect_to_mysql.php";
?>
<?php # search.inc.php

//header file:
include_once ('./includes/header.inc');
?>
<?php

$terms= $_GET['terms'];
echo "You've searched for: " . $terms;

$sql= "SELECT * FROM products WHERE product_name ='Big Tree'"; 
//-run  the query against the mysql query function 
$result=mysql_query($sql);

while ($row = mysql_fetch_array($result)) { // While there are products that match the search criteria, assign their data to a variable and echo their details on a webpage


             $id = $row["id"];
             $product_name = $row["product_name"];
             $price = $row["price"];
             $details = $row["details"];
             $category = $row["category"];
                echo '<br/> <img name="image" src="inventory_images/' . $row['id'] . '.jpg" width="100" height="150"/>';
                echo '<br/>';
                echo '<br/> Product Name: '.$row['product_name'];
                echo '<br/>';
                echo '<br/> <a href="modules/productsdetails.inc.php?id=' . $id . '">Click Here To View Product Page</a>';
                echo '<br/>';
                echo '<br/>';

        }
mysql_close(); //closes the MySQL connection.
?>
<?php
// Include footer file 
include_once ('./includes/footer.inc');
?>

正如你所看到的 - 我已经硬编码来搜索“Big Tree”。我的问题是 - 我如何编码它来搜索用户输入。

我已尝试％$ terms％但未打印任何结果。

Answer 1

您必须在查询中连接您要搜索的变量

$sql= "SELECT * FROM products WHERE product_name ='".$terms."'";

或

$sql= "SELECT * FROM products WHERE product_name LIKE '%".$terms."%'";

Answer 2

使用此：

$sql = "SELECT * FROM products WHERE product_name ='$terms'";

无需连接。

Answer 3

如果您在mysql 5.5或更低版本上使用innodb引擎，则必须像这样使用“LIKE”：

$sql= "SELECT * FROM products WHERE product_name like '%".$terms."%'";

如果你使用的是mysql 5.6，或者你正在使用myisam表，那么如果你在搜索的列上有全文索引，则可以使用MATCH AGAINST。

$sql= "SELECT match(product_name) against('".$terms."') as relevance 
FROM products 
WHERE relevance>0 
ORDER BY relevance desc";

请查看参数化查询，或者至少使用mysql_real_escape_string来清理变量。

Answer 4

我为mysql创建了一个函数，用于解析百分比排序的字符串。如果你愿意，你可以使用它。

它几乎可以找到您搜索的所有组合。

安装

首先你需要在mysql中创建一个函数。这是代码。我在phpmyadmin

中做到了

DELIMITER //

CREATE FUNCTION search ( search VARCHAR(255), string VARCHAR(255) )
RETURNS FLOAT
BEGIN

   DECLARE searchlength INT;
   DECLARE charcount INT DEFAULT 1;
   DECLARE ch VARCHAR(10); 

   DECLARE a INT DEFAULT 0; 
   DECLARE b INT DEFAULT 1;
   DECLARE c INT DEFAULT 0; 

   SET searchlength = LENGTH(search);

   WHILE charcount <= searchlength DO 
    SET ch = SUBSTRING(search,charcount,1); 

    IF LOCATE(ch,string) > 0 THEN 
      IF LOCATE(ch, string) - 1 = b THEN 
        SET c = c + 1; 
      END IF; 
      SET b = LOCATE(ch, string, b);
      SET a = a + 1; 
    END IF;

    SET charcount = charcount + 1;

   END WHILE;

   IF searchlength = a THEN 
    RETURN (c/30)*100; 
   END IF; 
   RETURN -1; 

END; //

DELIMITER ;

现在，当您从php进行mysql调用时，可以使用此函数。

$searchneedle = "Some string you like to search for"

SELECT name,username 
FROM users 
WHERE search(LOWER('$searchneedle'),CONCAT(LOWER(test_cullum))) > -1
ORDER BY search(LOWER('$searchneedle'),CONCAT(LOWER(test_cullum))) DESC

PHP的PHP搜索功能

4 个答案:

安装