search
HomeBackend DevelopmentPHP ProblemHow to use keyword query written in php
How to use keyword query written in phpJul 01, 2021 am 09:17 AM
phpKeywords

How to write keyword query in PHP: first get the keyword text input from the text box; then connect to the database to query, and query the records containing the keyword text in the book title or description; finally Just display the query results in a loop.

How to use keyword query written in php

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

How to write keyword query in php ?

PHP realizes the highlight function after keyword search:

When I first started learning PHP, I was curious about the keyword highlight after search, but in the past few days, I have consolidated it. When I learned the basics of PHP, I found that it was not difficult to achieve such an effect. As usual, let me show you the renderings first.

Running renderings

How to use keyword query written in php

Database related

  • The database name is Book has only one database table, which is also a book, and simulates 5 pieces of data.
  • The name field is the title of the book, and the description field is the description of the book

How to use keyword query written in php

##Code

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <title></title>
  <link rel="stylesheet" href="">
</head>
<body>
<form action="14.php" method="post">
  请输入关键字:<input type="text" name="keyword">
  <input type="submit" value="提交" />
</form>
<?php
  if(!empty($_POST[&#39;keyword&#39;])){
    $keyword = $_POST[&#39;keyword&#39;];//获取输入的关键字
    //进行数据库连接
    $conn = mysql_connect("localhost","root","1234");
    if(!$conn){
      die("数据库连接失败");
    }
    $flag = mysql_select_db("book",$conn);
    if(!$flag){
      die("数据库打开失败");
    }
    mysql_query("set names utf8");
    $sql = "select * from book where name like &#39;%$keyword%&#39; or description like &#39;%$keyword%&#39;";
    $result = mysql_query($sql,$conn);
    while($row = mysql_fetch_assoc($result)){
?>
<p style="width:300px;height:100px;background-color: #ccc;margin-bottom: 10px">
  <p>书名:<?php echo str_ireplace($keyword, "<font color=&#39;#f00&#39;>$keyword</font>",$row[&#39;name&#39;])?></p>
  <p>描述:<?php echo str_ireplace($keyword, "<font color=&#39;#f00&#39;>$keyword</font>",$row[&#39;description&#39;])?></p>
</p>
<?php
  }
}else{
  echo "很遗憾,没有找到书籍";
}
?>
</body>
</html>

Finally, let’s talk about the implementation principle. First, get the keyword text input from the text box, and then connect to the database to query, query the records containing the keyword text in the book title or description, and display the query results in a loop. , when displaying the book title and description, use the

str_ireplace() function to replace the keyword text with red text to achieve the effect of keyword highlighting.

Recommended learning: "

PHP Video Tutorial"

The above is the detailed content of How to use keyword query written in php. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
php怎么把负数转为正整数php怎么把负数转为正整数Apr 19, 2022 pm 08:59 PM

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

php怎么实现几秒后执行一个函数php怎么实现几秒后执行一个函数Apr 24, 2022 pm 01:12 PM

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php怎么除以100保留两位小数php怎么除以100保留两位小数Apr 22, 2022 pm 06:23 PM

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

php怎么根据年月日判断是一年的第几天php怎么根据年月日判断是一年的第几天Apr 22, 2022 pm 05:02 PM

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php怎么替换nbsp空格符php怎么替换nbsp空格符Apr 24, 2022 pm 02:55 PM

方法:1、用“str_replace("&nbsp;","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\&nbsp\;||\xc2\xa0)/","其他字符",$str)”语句。

php怎么判断有没有小数点php怎么判断有没有小数点Apr 20, 2022 pm 08:12 PM

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

php怎么设置implode没有分隔符php怎么设置implode没有分隔符Apr 18, 2022 pm 05:39 PM

在PHP中,可以利用implode()函数的第一个参数来设置没有分隔符,该函数的第一个参数用于规定数组元素之间放置的内容,默认是空字符串,也可将第一个参数设置为空,语法为“implode(数组)”或者“implode("",数组)”。

php字符串有没有下标php字符串有没有下标Apr 24, 2022 am 11:49 AM

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!