Example of implementing batch data deletion function by PHP+JS
- 2021-08-16 23:20:19
- OfStack
In this paper, an example is given to describe the function of batch deletion of data by PHP+JS. Share it for your reference, as follows:
Form
<form id="form2" name="form2" method="post" action="del_product.php" onsubmit="return checkF(this)">
<label>
<input type="checkbox" name="id[]" value="<?php echo $rs['id'];?>" style="background:none; border:none;" />
</label>
<div style="padding-left:20px;"><input type="button" value=" All selection " style="background:url(images/cheall.jpg) no-repeat; width:60px; height:23px; border:none;" onClick="selectBox('all')"/>
<input type="button" value=" Reverse selection " style="background:url(images/cheall.jpg) no-repeat; width:60px; height:23px; border:none;" onClick="selectBox('reverse')"/>
<input type="submit" name="btnSave" style="background:url(images/cheall.jpg) no-repeat; width:60px; height:23px; border:none;" value=" Delete "/></div>
</form>
JS
<script type="text/javascript" language="javascript">
function selectBox(selectType){
var checkboxis = document.getElementsByName("id[]");
if(selectType == "reverse"){
for (var i=0; i<checkboxis.length; i++){
//alert(checkboxis[i].checked);
checkboxis[i].checked = !checkboxis[i].checked;
}
}
else if(selectType == "all")
{
for (var i=0; i<checkboxis.length; i++){
//alert(checkboxis[i].checked);
checkboxis[i].checked = true;
}
}
}
</script>
del_product.php
<?php
include('checkadmin.php');
header('Content-Type: text/html; charset=utf-8');
if($_POST['btnSave']){
if(empty($_POST['id'])){
echo"<script>alert(' You must select 1 Product , You can delete it !');history.back(-1);</script>";
exit;
}else{
/* If you want to get all the values, use the following code */
$id= implode(",",$_POST['id']);
$str="DELETE FROM `product` where id in ($id)";
mysql_query($str);
echo "<script>alert(' Delete successful! ');window.location.href='product_list.php';</script>";
}
}
?>
Attachment: Database operation class implemented by php
Db. php:
<?php
Class DB {
private $link_id;
private $handle;
private $is_log;
private $time;
// Constructor
public function __construct() {
$this->time = $this->microtime_float();
require_once("config.db.php");
$this->connect($db_config["hostname"], $db_config["username"], $db_config["password"], $db_config["database"], $db_config["pconnect"]);
$this->is_log = $db_config["log"];
if($this->is_log){
$handle = fopen($db_config["logfilepath"]."dblog.txt", "a+");
$this->handle=$handle;
}
}
// Database connection
public function connect($dbhost, $dbuser, $dbpw, $dbname, $pconnect = 0,$charset='utf8') {
if( $pconnect==0 ) {
$this->link_id = @mysql_connect($dbhost, $dbuser, $dbpw, true);
if(!$this->link_id){
$this->halt(" Database connection failed ");
}
} else {
$this->link_id = @mysql_pconnect($dbhost, $dbuser, $dbpw);
if(!$this->link_id){
$this->halt(" Database persistent connection failed ");
}
}
if(!@mysql_select_db($dbname,$this->link_id)) {
$this->halt(' Database selection failed ');
}
@mysql_query("set names ".$charset);
}
// Query
public function query($sql) {
$this->write_log(" Query ".$sql);
$query = mysql_query($sql,$this->link_id);
if(!$query) $this->halt('Query Error: ' . $sql);
return $query;
}
// Get 1 Records ( MYSQL_ASSOC , MYSQL_NUM , MYSQL_BOTH )
public function get_one($sql,$result_type = MYSQL_ASSOC) {
$query = $this->query($sql);
$rt =& mysql_fetch_array($query,$result_type);
$this->write_log(" Get 1 A record ".$sql);
return $rt;
}
// Get all records
public function get_all($sql,$result_type = MYSQL_ASSOC) {
$query = $this->query($sql);
$i = 0;
$rt = array();
while($row =& mysql_fetch_array($query,$result_type)) {
$rt[$i]=$row;
$i++;
}
$this->write_log(" Get all records ".$sql);
return $rt;
}
// Insert
public function insert($table,$dataArray) {
$field = "";
$value = "";
if( !is_array($dataArray) || count($dataArray)<=0) {
$this->halt(' No data to insert ');
return false;
}
while(list($key,$val)=each($dataArray)) {
$field .="$key,";
$value .="'$val',";
}
$field = substr( $field,0,-1);
$value = substr( $value,0,-1);
$sql = "insert into $table($field) values($value)";
$this->write_log(" Insert ".$sql);
if(!$this->query($sql)) return false;
return true;
}
// Update
public function update( $table,$dataArray,$condition="") {
if( !is_array($dataArray) || count($dataArray)<=0) {
$this->halt(' No data to update ');
return false;
}
$value = "";
while( list($key,$val) = each($dataArray))
$value .= "$key = '$val',";
$value .= substr( $value,0,-1);
$sql = "update $table set $value where 1=1 and $condition";
$this->write_log(" Update ".$sql);
if(!$this->query($sql)) return false;
return true;
}
// Delete
public function delete( $table,$condition="") {
if( empty($condition) ) {
$this->halt(' There are no conditions set for deletion ');
return false;
}
$sql = "delete from $table where 1=1 and $condition";
$this->write_log(" Delete ".$sql);
if(!$this->query($sql)) return false;
return true;
}
// Returns a result set
public function fetch_array($query, $result_type = MYSQL_ASSOC){
$this->write_log(" Returns a result set ");
return mysql_fetch_array($query, $result_type);
}
// Get the number of records
public function num_rows($results) {
if(!is_bool($results)) {
$num = mysql_num_rows($results);
$this->write_log(" The number of records obtained is ".$num);
return $num;
} else {
return 0;
}
}
// Release the result set
public function free_result() {
$void = func_get_args();
foreach($void as $query) {
if(is_resource($query) && get_resource_type($query) === 'mysql result') {
return mysql_free_result($query);
}
}
$this->write_log(" Release the result set ");
}
// Gets the last inserted id
public function insert_id() {
$id = mysql_insert_id($this->link_id);
$this->write_log(" Last inserted id For ".$id);
return $id;
}
// Close the database connection
protected function close() {
$this->write_log(" Database connection closed ");
return @mysql_close($this->link_id);
}
// Error prompt
private function halt($msg='') {
$msg .= "\r\n".mysql_error();
$this->write_log($msg);
die($msg);
}
// Destructor
public function __destruct() {
$this->free_result();
$use_time = ($this-> microtime_float())-($this->time);
$this->write_log(" Complete the entire query task , The time taken is ".$use_time);
if($this->is_log){
fclose($this->handle);
}
}
// Write to log file
public function write_log($msg=''){
if($this->is_log){
$text = date("Y-m-d H:i:s")." ".$msg."\r\n";
fwrite($this->handle,$text);
}
}
// Get the number of milliseconds
public function microtime_float() {
list($usec, $sec) = explode(" ", microtime());
return ((float)$usec + (float)$sec);
}
}
?>
config.db.php
<?php
$db_config["hostname"] = "localhost"; // Server address
$db_config["username"] = "root"; // Database user name
$db_config["password"] = "123"; // Database password
$db_config["database"] = "test"; // Database name
$db_config["charset"] = "utf8";// Database coding
$db_config["pconnect"] = 1;// Open a persistent connection
$db_config["log"] = 1;// Open log
$db_config["logfilepath"] = './';// Open log
?>
For more readers interested in PHP related contents, please check the topics on this site: "Introduction to php+mysql Database Operation", "Summary of php+mysqli Database Programming Skills", "Introduction to php Object-Oriented Programming", "Encyclopedia of PHP Array (Array) Operation Skills", "Summary of php String (string) Usage" and "Summary of php Common Database Operation Skills"
I hope this article is helpful to everyone's PHP programming.