PHP实战第一天
今天我学到了
php发送给浏览器设置编码
header('content-type:text/html;charset=utf-8');
smarty模板引擎在类里面会报N多错
brophp里的DB类,我修改了也无法单独使用
thinkphp里的DB类,我修改了也是不能单独使用.
最后使用了 网上开源的 mysql类
[php]
// +----------------------------------------------------------------------
// |MySQL操作类
// +----------------------------------------------------------------------
// |@微凉 QQ:496928838
// +----------------------------------------------------------------------
class MySQL{
private $db_mysql_hostname;
private $db_mysql_username;
private $db_mysql_password;
private $db_mysql_database;
private $db_mysql_port;
private $db_mysql_charset;
private $query_list = array();
//查询次数
public $query_count = 0;
//查询开始时间
public $query_start_time;
//当前查询ID
protected $queryID;
//当前连接
protected $conn;
// 事务指令数
protected $transTimes = 0;
// 返回或者影响记录数
protected $numRows = 0;
// 错误信息
protected $error = '';
public function __construct($hostname_or_conf,$username,$password,$database,$port = '3306',$char = 'utf8'){
if(is_array($hostname_or_conf)){
$this->db_mysql_hostname = $hostname_or_conf['hostname'];
$this->db_mysql_username = $hostname_or_conf['username'];
$this->db_mysql_password = $hostname_or_conf['password'];
$this->db_mysql_database = $hostname_or_conf['database'];
$this->db_mysql_port = isset($hostname_or_conf['port'])?$hostname_or_conf['port']:'3306';
$this->db_mysql_charset = isset($hostname_or_conf['charset'])?$hostname_or_conf['charset']:'utf8';
}elseif(!empty($hostname_or_conf)||!empty($username)||!empty($password)||!empty($database))
{
$this->db_mysql_hostname = $hostname_or_conf;
$this->db_mysql_username = $username;
$this->db_mysql_password = $password;
$this->db_mysql_database = $database;
$this->db_mysql_port = $port;
$this->db_mysql_charset = $char;
}else{
die('configuration error.');
}
$this->connect();
}
private function connect(){
$server = $this->db_mysql_hostname.':'.$this->db_mysql_port;
$this->conn = mysql_connect($server,$this->db_mysql_username,$this->db_mysql_password,true) or die('Connect MySQL DB error!');
mysql_select_db($this->db_mysql_database,$this->conn) or die('select db error!');
mysql_query("set names " . $this->db_mysql_charset, $this->conn);
}
/**
+----------------------------------------------------------
* 设置数据对象值
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
*table,where,order,limit,data,field,join,group,having
+----------------------------------------------------------
*/
public function table($table){
$this->query_list['table'] = $table;
return $this;
}
public function where($where){
$this->query_list['where'] = $where;
return $this;
}
public function order($order){
$this->query_list['order'] = $order;
return $this;
}
public function limit($offset,$length){
if(!isset($length)){
$length = $offset;
$offset = 0;
}
$this->query_list['limit'] = 'limit '.$offset.','.$length;
return $this;
}
public function data($data){
/*
if(is_object($data)){
$data = get_object_vars($data);
}elseif (is_string($data)){
parse_str($data,$data);
}elseif(!is_array($data)){
//Log:DATA_TYPE_INVALID
}
*/
$this->query_list['data'] = $data;
return $this;
}
public function field($fields){
$this->query_list['fields'] = $fields;
return $this;
}
public function join($join){
$this->query_list['join'] = $join;
return $this;
}
public function group($group){
$this->query_list['group'] = $group;
return $this;
}
public function having($having){
$this->query_list['having'] = $having;
return $this;
}
/**
+----------------------------------------------------------
* 查询
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param
+----------------------------------------------------------
*/
public function select(){
$select_sql = 'select ';
$fields = isset($this->query_list['fields'])?$this->query_list['fields']:'*';
$select_sql.=$fields;
$select_sql.= ' from `'.$this->query_list['table'].'` ';
isset($this->query_list['join'])?($select_sql.=$this->query_list['join']):'';
isset($this->query_list['where'])?($select_sql.=' where '.$this->query_list['where']):'';
isset($this->query_list['group'])?($select_sql.=' group by'.$this->query_list['group']):'';
isset($this->query_list['having'])?($select_sql.=' mysql having '.$this->query_list['having']):'';
isset($this->query_list['order'])?($select_sql.=' order by '.$this->query_list['order']):'';
isset($this->query_list['limit'])?($select_sql.=' '.$this->query_list['limit']):'';
return $this->query($select_sql);
}
/**
+----------------------------------------------------------
* 增加
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param
+----------------------------------------------------------
*/
public function add(){
$add_sql = 'insert into `'.$this->query_list['table'].'` (';
$data = $this->query_list['data'];
$value = $field = '';
foreach($data as $k=>$v){
$field .= '`'.$k.'`,';
if(is_numeric($v))
$value .= $v.',';
else
$value .= '\''.$v.'\',';
}
$add_sql .= rtrim($field,',').') values ('.rtrim($value,',').')';
return $this->execute($add_sql);
}
/**
+----------------------------------------------------------
* 删除
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param
+----------------------------------------------------------
*/
public function delete(){
$del_sql = 'delete from `'.$this->query_list['table'].'` where '.$this->query_list['where'];
if(isset($this->query_list['order']))
$del_sql .= 'order by '.$this->query_list['order'];
if(isset($this->query_list['limit']))
$del_sql .= ' '.$this->query_list['limit'];
return $this->execute($del_sql);
}
/**
+----------------------------------------------------------
* 更新
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param
+----------------------------------------------------------
*/
public function update(){
$update_sql = 'update `'.$this->query_list['table'].'` set ';
$data = $this->query_list['data'];
foreach($data as $k=>$v){
if(is_numeric($v))
$update_sql .= '`'.$k.'` ='.$v.',';
else
$update_sql .= '`'.$k.'` =\''.$v.'\',';
}
$update_sql = rtrim($update_sql,',');
if(isset($this->query_list['where']))
$update_sql .= ' where '.$this->query_list['where'];
if(isset($this->query_list['order']))
$update_sql .= ' order by '.$this->query_list['order'];
if(isset($this->query_list['limit']))
$update_sql .= ' '.$this->query_list['limit'];
return $this->execute($update_sql);
}
/**
+----------------------------------------------------------
* 执行查询 返回数据集
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param string $sql sql指令
*/
public function query($sql) {
if ( !$this->conn ) return false;
$this->queryStr = $sql;
//释放前次的查询结果
if ( $this->queryID ) { $this->free(); }
$this->query_start_time = microtime(true);
$this->queryID = mysql_query($sql, $this->conn);
$this->query_count++;
if ( false === $this->queryID ) {
$this->error();
return false;
} else {
$this->numRows = mysql_num_rows($this->queryID);
return $this->getAll();
}
}
/**
+----------------------------------------------------------
* 执行语句
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param string $sql sql指令
+----------------------------------------------------------
*/
public function execute($sql) {
if ( !$this->conn ) return false;
$this->queryStr = $sql;
//释放前次的查询结果
if ( $this->queryID ) { $this->free(); }
$this->query_start_time = microtime(true);
$result = mysql_query($sql, $this->conn) ;
$this->query_count++;
if ( false === $result) {
$this->error();
return false;
} else {
$this->numRows = mysql_affected_rows($this->conn);
return $this->numRows;
}
}
/**
+----------------------------------------------------------
* 获得所有的查询数据
+----------------------------------------------------------
* @access private
+----------------------------------------------------------
* @return array
*/
private function getAll() {
//返回数据集
$result = array();
if($this->numRows >0) {
while($row = mysql_fetch_assoc($this->queryID)){
$result[] = $row;
}
mysql_data_seek($this->queryID,0);
}
return $result;
}
/**
+----------------------------------------------------------
* 取得数据表的字段信息
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
*/
public function getFields($tableName) {
$result = $this->query('SHOW COLUMNS FROM `'.$tableName.'`');
$info = array();
if($result) {
foreach ($result as $key => $val) {
$info[$val['Field']] = array(
'name' => $val['Field'],
'type' => $val['Type'],
'notnull' => (bool) ($val['Null'] === ''), // not null is empty, null is yes
'default' => $val['Default'],
'primary' => (strtolower($val['Key']) == 'pri'),
'autoinc' => (strtolower($val['Extra']) == 'auto_increment'),
);
}
}
return $info;
}
/**
+----------------------------------------------------------
* 取得数据库的表信息
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
*/
public function getTables($dbName='') {
if(!empty($dbName)) {
$sql = 'SHOW TABLES FROM '.$dbName;
}else{
$sql = 'SHOW TABLES ';
}
$result = $this->query($sql);
$info = array();
foreach ($result as $key => $val) {
$info[$key] = current($val);
}
return $info;
}
/**
+----------------------------------------------------------
* 最后次操作的ID
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param
+----------------------------------------------------------
*/
public function last_insert_id(){
return mysql_insert_id($this->conn);
}
/**
* 执行一条带有结果集计数的
*/
public function count($sql){
return $this->execute($sql);
}
/**
+----------------------------------------------------------
* 启动事务
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @return void
+----------------------------------------------------------
*/
public function startTrans() {
if ($this->transTimes == 0) {
mysql_query('START TRANSACTION', $this->conn);
}
$this->transTimes++;
return ;
}
/**
+----------------------------------------------------------
* 提交事务
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @return boolen
+----------------------------------------------------------
*/
public function commit()
{
if ($this->transTimes > 0) {
$result = mysql_query('COMMIT', $this->conn);
$this->transTimes = 0;
if(!$result){
throw new Exception($this->error());
}
}
return true;
}
/**
+----------------------------------------------------------
* 事务回滚
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @return boolen
+----------------------------------------------------------
*/
public function rollback()
{
if ($this->transTimes > 0) {
$result = mysql_query('ROLLBACK', $this->conn);
$this->transTimes = 0;
if(!$result){
throw new Exception($this->error());
}
}
return true;
}
/**
+----------------------------------------------------------
* 错误信息
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param
+----------------------------------------------------------
*/
public function error() {
$this->error = mysql_error($this->conn);
if('' != $this->queryStr){
$this->error .= "\n [ SQL语句 ] : ".$this->queryStr;
}
return $this->error;
}
/**
+----------------------------------------------------------
* 释放查询结果
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
*/
public function free() {
@mysql_free_result($this->queryID);
$this->queryID = 0;
$this->query_list = null;
}
/**
+----------------------------------------------------------
* 关闭连接
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param
+----------------------------------------------------------
*/
function close(){
if ($this->conn && !mysql_close($this->conn)){
throw new Exception($this->error());
}
$this->conn = 0;
$this->query_count = 0;
}
/**
+----------------------------------------------------------
* 析构方法
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
*/
function __destruct(){
$this->close();
}
}
// +----------------------------------------------------------------------
// |MySQL操作类
// +----------------------------------------------------------------------
// |@微凉 QQ:496928838
// +----------------------------------------------------------------------
class MySQL{
private $db_mysql_hostname;
private $db_mysql_username;
private $db_mysql_password;
private $db_mysql_database;
private $db_mysql_port;
private $db_mysql_charset;
private $query_list = array();
//查询次数
public $query_count = 0;
//查询开始时间
public $query_start_time;
//当前查询ID
protected $queryID;
//当前连接
protected $conn;
// 事务指令数
protected $transTimes = 0;
// 返回或者影响记录数
protected $numRows = 0;
// 错误信息
protected $error = '';
public function __construct($hostname_or_conf,$username,$password,$database,$port = '3306',$char = 'utf8'){
if(is_array($hostname_or_conf)){
$this->db_mysql_hostname = $hostname_or_conf['hostname'];
$this->db_mysql_username = $hostname_or_conf['username'];
$this->db_mysql_password = $hostname_or_conf['password'];
$this->db_mysql_database = $hostname_or_conf['database'];
$this->db_mysql_port = isset($hostname_or_conf['port'])?$hostname_or_conf['port']:'3306';
$this->db_mysql_charset = isset($hostname_or_conf['charset'])?$hostname_or_conf['charset']:'utf8';
}elseif(!empty($hostname_or_conf)||!empty($username)||!empty($password)||!empty($database))
{
$this->db_mysql_hostname = $hostname_or_conf;
$this->db_mysql_username = $username;
$this->db_mysql_password = $password;
$this->db_mysql_database = $database;
$this->db_mysql_port = $port;
$this->db_mysql_charset = $char;
}else{
die('configuration error.');
}
$this->connect();
}
private function connect(){
$server = $this->db_mysql_hostname.':'.$this->db_mysql_port;
$this->conn = mysql_connect($server,$this->db_mysql_username,$this->db_mysql_password,true) or die('Connect MySQL DB error!');
mysql_select_db($this->db_mysql_database,$this->conn) or die('select db error!');
mysql_query("set names " . $this->db_mysql_charset, $this->conn);
}
/**
+----------------------------------------------------------
* 设置数据对象值
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
*table,where,order,limit,data,field,join,group,having
+----------------------------------------------------------
*/
public function table($table){
$this->query_list['table'] = $table;
return $this;
}
public function where($where){
$this->query_list['where'] = $where;
return $this;
}
public function order($order){
$this->query_list['order'] = $order;
return $this;
}
public function limit($offset,$length){
if(!isset($length)){
$length = $offset;
$offset = 0;
}
$this->query_list['limit'] = 'limit '.$offset.','.$length;
return $this;
}
public function data($data){
/*
if(is_object($data)){
$data = get_object_vars($data);
}elseif (is_string($data)){
parse_str($data,$data);
}elseif(!is_array($data)){
//Log:DATA_TYPE_INVALID
}
*/
$this->query_list['data'] = $data;
return $this;
}
public function field($fields){
$this->query_list['fields'] = $fields;
return $this;
}
public function join($join){
$this->query_list['join'] = $join;
return $this;
}
public function group($group){
$this->query_list['group'] = $group;
return $this;
}
public function having($having){
$this->query_list['having'] = $having;
return $this;
}
/**
+----------------------------------------------------------
* 查询
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param
+----------------------------------------------------------
*/
public function select(){
$select_sql = 'select ';
$fields = isset($this->query_list['fields'])?$this->query_list['fields']:'*';
$select_sql.=$fields;
$select_sql.= ' from `'.$this->query_list['table'].'` ';
isset($this->query_list['join'])?($select_sql.=$this->query_list['join']):'';
isset($this->query_list['where'])?($select_sql.=' where '.$this->query_list['where']):'';
isset($this->query_list['group'])?($select_sql.=' group by'.$this->query_list['group']):'';
isset($this->query_list['having'])?($select_sql.=' mysql having '.$this->query_list['having']):'';
isset($this->query_list['order'])?($select_sql.=' order by '.$this->query_list['order']):'';
isset($this->query_list['limit'])?($select_sql.=' '.$this->query_list['limit']):'';
return $this->query($select_sql);
}
/**
+----------------------------------------------------------
* 增加
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param
+----------------------------------------------------------
*/
public function add(){
$add_sql = 'insert into `'.$this->query_list['table'].'` (';
$data = $this->query_list['data'];
$value = $field = '';
foreach($data as $k=>$v){
$field .= '`'.$k.'`,';
if(is_numeric($v))
$value .= $v.',';
else
$value .= '\''.$v.'\',';
}
$add_sql .= rtrim($field,',').') values ('.rtrim($value,',').')';
return $this->execute($add_sql);
}
/**
+----------------------------------------------------------
* 删除
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param
+----------------------------------------------------------
*/
public function delete(){
$del_sql = 'delete from `'.$this->query_list['table'].'` where '.$this->query_list['where'];
if(isset($this->query_list['order']))
$del_sql .= 'order by '.$this->query_list['order'];
if(isset($this->query_list['limit']))
$del_sql .= ' '.$this->query_list['limit'];
return $this->execute($del_sql);
}
/**
+----------------------------------------------------------
* 更新
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param
+----------------------------------------------------------
*/
public function update(){
$update_sql = 'update `'.$this->query_list['table'].'` set ';
$data = $this->query_list['data'];
foreach($data as $k=>$v){
if(is_numeric($v))
$update_sql .= '`'.$k.'` ='.$v.',';
else
$update_sql .= '`'.$k.'` =\''.$v.'\',';
}
$update_sql = rtrim($update_sql,',');
if(isset($this->query_list['where']))
$update_sql .= ' where '.$this->query_list['where'];
if(isset($this->query_list['order']))
$update_sql .= ' order by '.$this->query_list['order'];
if(isset($this->query_list['limit']))
$update_sql .= ' '.$this->query_list['limit'];
return $this->execute($update_sql);
}
/**
+----------------------------------------------------------
* 执行查询 返回数据集
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param string $sql sql指令
*/
public function query($sql) {
if ( !$this->conn ) return false;
$this->queryStr = $sql;
//释放前次的查询结果
if ( $this->queryID ) { $this->free(); }
$this->query_start_time = microtime(true);
$this->queryID = mysql_query($sql, $this->conn);
$this->query_count++;
if ( false === $this->queryID ) {
$this->error();
return false;
} else {
$this->numRows = mysql_num_rows($this->queryID);
return $this->getAll();
}
}
/**
+----------------------------------------------------------
* 执行语句
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param string $sql sql指令
+----------------------------------------------------------
*/
public function execute($sql) {
if ( !$this->conn ) return false;
$this->queryStr = $sql;
//释放前次的查询结果
if ( $this->queryID ) { $this->free(); }
$this->query_start_time = microtime(true);
$result = mysql_query($sql, $this->conn) ;
$this->query_count++;
if ( false === $result) {
$this->error();
return false;
} else {
$this->numRows = mysql_affected_rows($this->conn);
return $this->numRows;
}
}
/**
+----------------------------------------------------------
* 获得所有的查询数据
+----------------------------------------------------------
* @access private
+----------------------------------------------------------
* @return array
*/
private function getAll() {
//返回数据集
$result = array();
if($this->numRows >0) {
while($row = mysql_fetch_assoc($this->queryID)){
$result[] = $row;
}
mysql_data_seek($this->queryID,0);
}
return $result;
}
/**
+----------------------------------------------------------
* 取得数据表的字段信息
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
*/
public function getFields($tableName) {
$result = $this->query('SHOW COLUMNS FROM `'.$tableName.'`');
$info = array();
if($result) {
foreach ($result as $key => $val) {
$info[$val['Field']] = array(
'name' => $val['Field'],
'type' => $val['Type'],
'notnull' => (bool) ($val['Null'] === ''), // not null is empty, null is yes
'default' => $val['Default'],
'primary' => (strtolower($val['Key']) == 'pri'),
'autoinc' => (strtolower($val['Extra']) == 'auto_increment'),
);
}
}
return $info;
}
/**
+----------------------------------------------------------
* 取得数据库的表信息
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
*/
public function getTables($dbName='') {
if(!empty($dbName)) {
$sql = 'SHOW TABLES FROM '.$dbName;
}else{
$sql = 'SHOW TABLES ';
}
$result = $this->query($sql);
$info = array();
foreach ($result as $key => $val) {
$info[$key] = current($val);
}
return $info;
}
/**
+----------------------------------------------------------
* 最后次操作的ID
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param
+----------------------------------------------------------
*/
public function last_insert_id(){
return mysql_insert_id($this->conn);
}
/**
* 执行一条带有结果集计数的
*/
public function count($sql){
return $this->execute($sql);
}
/**
+----------------------------------------------------------
* 启动事务
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @return void
+----------------------------------------------------------
*/
public function startTrans() {
if ($this->transTimes == 0) {
mysql_query('START TRANSACTION', $this->conn);
}
$this->transTimes++;
return ;
}
/**
+----------------------------------------------------------
* 提交事务
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @return boolen
+----------------------------------------------------------
*/
public function commit()
{
if ($this->transTimes > 0) {
$result = mysql_query('COMMIT', $this->conn);
$this->transTimes = 0;
if(!$result){
throw new Exception($this->error());
}
}
return true;
}
/**
+----------------------------------------------------------
* 事务回滚
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @return boolen
+----------------------------------------------------------
*/
public function rollback()
{
if ($this->transTimes > 0) {
$result = mysql_query('ROLLBACK', $this->conn);
$this->transTimes = 0;
if(!$result){
throw new Exception($this->error());
}
}
return true;
}
/**
+----------------------------------------------------------
* 错误信息
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param
+----------------------------------------------------------
*/
public function error() {
$this->error = mysql_error($this->conn);
if('' != $this->queryStr){
$this->error .= "\n [ SQL语句 ] : ".$this->queryStr;
}
return $this->error;
}
/**
+----------------------------------------------------------
* 释放查询结果
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
*/
public function free() {
@mysql_free_result($this->queryID);
$this->queryID = 0;
$this->query_list = null;
}
/**

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PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

The core benefits of PHP include ease of learning, strong web development support, rich libraries and frameworks, high performance and scalability, cross-platform compatibility, and cost-effectiveness. 1) Easy to learn and use, suitable for beginners; 2) Good integration with web servers and supports multiple databases; 3) Have powerful frameworks such as Laravel; 4) High performance can be achieved through optimization; 5) Support multiple operating systems; 6) Open source to reduce development costs.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP is suitable for web development and content management systems, and Python is suitable for data science, machine learning and automation scripts. 1.PHP performs well in building fast and scalable websites and applications and is commonly used in CMS such as WordPress. 2. Python has performed outstandingly in the fields of data science and machine learning, with rich libraries such as NumPy and TensorFlow.

PHP is a server-side scripting language used for dynamic web development and server-side applications. 1.PHP is an interpreted language that does not require compilation and is suitable for rapid development. 2. PHP code is embedded in HTML, making it easy to develop web pages. 3. PHP processes server-side logic, generates HTML output, and supports user interaction and data processing. 4. PHP can interact with the database, process form submission, and execute server-side tasks.

PHP has shaped the network over the past few decades and will continue to play an important role in web development. 1) PHP originated in 1994 and has become the first choice for developers due to its ease of use and seamless integration with MySQL. 2) Its core functions include generating dynamic content and integrating with the database, allowing the website to be updated in real time and displayed in personalized manner. 3) The wide application and ecosystem of PHP have driven its long-term impact, but it also faces version updates and security challenges. 4) Performance improvements in recent years, such as the release of PHP7, enable it to compete with modern languages. 5) In the future, PHP needs to deal with new challenges such as containerization and microservices, but its flexibility and active community make it adaptable.
