How to use keyword query written in php
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.
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
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
##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['keyword'])){
$keyword = $_POST['keyword'];//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");
$sql = "select * from book where name like '%$keyword%' or description like '%$keyword%'";
$result = mysql_query($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='#f00'>$keyword</font>",$row['name'])?></p>
<p>描述：<?php echo str_ireplace($keyword, "<font color='#f00'>$keyword</font>",$row['description'])?></p>
</p>
<?php
}
}else{
echo "很遗憾，没有找到书籍";
}
?>
</body>
</html>str_ireplace() function to replace the keyword text with red text to achieve the effect of keyword highlighting.
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