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<?php

// pdo: preprocessing

// The essence of preprocessing: the data in the sql statement is dynamically bound

// Dynamic binding: real data is bound only when sql is executed

// Static binding: data is written directly to sql

// 1. Static: select * from staff where id > 10

// 2. Dynamic (preprocessing): select * from staff where id > ?

##// 1. Anonymous parameter index array

namespace pdo_edu;

use PDO;

// Connection

$db = new PDO('mysql:dbname=bittel', 'root', 'root');

// CURD: INSERT

// Anonymous parameters: ?

$sql = 'INSERT `staff` SET `name`= ?,`sex`= ?,`email`= ?;';

// sql statement->sql statement template object->preprocessing object

$stmt = $db->prepare($sql);

/ / Placeholder in sql statement?, bind real data to it

// Index array

$data = ['Yangguo', 0, 'yangguo@qq.com'] ;

//Execute sql

$stmt->execute($data);

// Verification: Print sql preprocessing command

// $stmt->debugDumpParams();

echo 'Added successfully, id = ' . $db->lastInsertId () . '<br>';