A brief analysis of how to use multiple fuzzy query statements in PHP

PHP is a very popular programming language, especially widely used in the field of web development. In the process of using PHP for web development, database query operations are often required, and the writing of query statements is crucial. Among them, fuzzy query is a very common query method. This article will introduce how to use multiple fuzzy query statements in PHP to implement database data query operations.

In PHP, you can use SQL statements to perform database query operations through the mysql extension or mysqli extension. Fuzzy query is implemented by using the like keyword and wildcard symbols (% and _). Specifically, % represents any number of characters, while _ represents a single character. In multiple fuzzy query statements, you can use multiple like keywords to compare data, and combine multiple query conditions through logical operators such as and or or.

The following uses a specific example to illustrate how to use multiple fuzzy query statements to perform database query operations. Suppose there is the following table structure:

| id | name         | age |
--------------------------
| 1  | Tom Jones    | 22  |
| 2  | John Smith   | 25  |
| 3  | Peter Parker | 30  |
| 4  | Mary Lee     | 28  |
| 5  | Lucy Zhang   | 24  |
| 6  | Ben Li       | 26  |
| 7  | Anne Wang    | 27  |

Now we need to query the information of all users who are between 23 and 27 years old and whose names contain "li" or "wang". This can be achieved through the following PHP code:

<?php
// 连接数据库
$conn = mysqli_connect("localhost", "username", "password", "database");

// 查询语句
$sql = "SELECT * FROM users WHERE age BETWEEN 23 AND 27 AND (name LIKE &#39;%li%&#39; OR name LIKE &#39;%wang%&#39;)";

// 执行查询
$result = mysqli_query($conn, $sql);

// 输出查询结果
while ($row = mysqli_fetch_assoc($result)) {
    echo "id:" . $row["id"] . " name:" . $row["name"] . " age:" . $row["age"] . "<br/>";
}

// 关闭数据库连接
mysqli_close($conn);
?>

In the above code, first use the mysqli_connect function to connect to the database, and then implement multiple fuzzy query conditions by splicing SQL statements. Among them, the BETWEEN and AND keywords are used to express the age range, while the brackets and OR keywords connect the conditions containing "li" or "wang" in the name to form a complete query statement. Finally, the query is executed through the mysqli_query function, and the query results are output using the mysqli_fetch_assoc function.

In summary, using PHP to perform multiple fuzzy query statements mainly includes two aspects: one is to splice SQL statements according to specific query requirements, and the other is to perform query operations through relevant PHP extension functions, and Process query results. In actual development, it is necessary to continuously study and practice in depth according to specific application scenarios, and master more database query skills.

The above is the detailed content of A brief analysis of how to use multiple fuzzy query statements in PHP. For more information, please follow other related articles on the PHP Chinese website!