Implementation code for searching and highlighting keywords in PHP site_PHP tutorial

Copy code The code is as follows:

require_once 'sqlTools.class.php';//Encapsulation class, Executable dql, dml statements
$info=$_POST['info'];
$sql="select name,password,email from user_500 where name like '%$info%' or password like '%$ info%' or email like '%$info%'";
$sqlTools=new SqlTools();
$res=$sqlTools->execute_dql($sql);
while ($row= mysql_fetch_assoc($res)){
$row['name']=preg_replace("/($info)/i","\1" ,$row['name']);
$row['password']=preg_replace("/($info)/i","\1 b>",$row['password']);
$row['email']=preg_replace("/($info)/i","\ 1",$row['email']);
echo $row['name']."-->".$row['password']."-->". $row['email']."
";
}
?>

Idea analysis:
Convert the %$info% contained in the sql statement When handed over to the DBMS for execution, it will search for information containing the value of the variable $info in the field,
%$info---> Search for information ending with the value of $info
$info%--- >Find information starting with the value of $info
Highlight the searched keywords through the regular function preg_replace(), for example,
　$row['name']=preg_replace("/($info )/i","\1",$row['name']);
　 It means: the value received through the POST party $ Replace info with the result with style (red bold), and reassign the result to $row['name']
If you want to search for multiple keywords, you can split the received value $info, for example $info_more=explode(" ",$info);//This method can split keywords separated by spaces, and then query the split results one by one. Similarly, you can use regular expression functions for replacement. , to highlight the source code of keyword
sqlTools.class.php:

Copy the code The code is as follows:

class SqlTools{
private $host="localhost";
private $dbname="test";
private $dbuser="root";
private $dbpwd ="";
private $conn;
public function __construct(){
$this->conn=mysql_connect($this->host,$this->dbuser,$this-> ;dbpwd);
if(!$this->conn){
die("Failed to connect to database".mysql_error());
}
mysql_select_db($this->dbname, $this->conn) or die("The database cannot be found".mysql_error());
mysql_query("set names utf8");
}
public function execute_dml($sql){
$bool=mysql_query($sql);
if ($bool){
if ($bool>0) {
return 1;
}else{
return 2;
}
}else {
return 0;
}
}
public function execute_dql($sql){
$res=mysql_query($sql);
return $res;
}
public function close_conn(){
mysql_close($this->conn);
}
}
?>

Original article: WEB Development_Xiao Fei

http://www.bkjia.com/PHPjc/324825.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/324825.htmlTechArticleCopy the code as follows: ?php require_once 'sqlTools.class.php';//Encapsulation class, executable dql , dml statement $info=$_POST['info']; $sql="select name,password,email from user_500 where...