Php Mysqli preprocessing statement two instance code

Php tutorial mysql tutorial I preprocessing statement two instance code

<? Php
/* ===================================== Mysqli_stmt preprocessing class (recommended) ======================================= */
/* =, Security ===================================== */
$ Mysqli = new mysqli ("localhost", "root", "123456", "xiaoqiangdb ");
 
 
/* = ======================================= */
 
$ SQL = "insert into shops tutorial (name, price, num, desn) values (?,?,?,?) "; // Prepare a statement to be placed on the server
 
$ Stmt = $ mysqli-> prepare ($ SQL); // database placement tutorial
 
$ Stmt-> bind_param ("sdis", $ name, $ price, $ num, $ desn); // pass the value to the placeholder, type-variable (cannot be a value)
 
$ Name = "zhangsan ";
$ Price = 56.56;
$ Num = 66;
$ Desn = "good ";
 
$ Stmt-> execute (); // execute
 
Echo "last id". $ stmt-> insert_id;
$ Stmt-> close ();

/* = ===================================== */

$ SQL = "select id, name, price, num, desn from shops where id>? "; // Prepare a statement to be placed on the server
 
$ Stmt = $ mysqli-> prepare ($ SQL); // put it in the database
 
$ Stmt-> bind_param ("I", $ id); // send a value to the placeholder, type-variable (cannot be a value)
 
$ Stmt-> bind_result ($ id, $ name, $ price, $ num, $ desn); // bind the result set
 
$ Id = 99;
 
$ Stmt-> execute (); // execute
 
$ Stmt-> store_result (); // only the results of one-time lecture can be obtained to move the pointer and obtain the total number.
 
// Field Information
$ Result = $ stmt-> result_metadata ();
 
While ($ field = $ result-> fetch_field ()){
Echo $ field-> name;
}
Echo "<br> ";
 
// Record information
$ Stmt-> data_seek (2 );
 
While ($ stmt-> fetch ()){
Echo "$ id -- $ name -- $ price -- $ num -- $ desn <br> ";
}
Echo "Total number of records:". $ stmt-> num_rows;
 
$ Stmt-> free_result ();
 
$ Stmt-> close ();

?>

Instance 2

<? Php
 
$ Mysqli = new mysqli ("localhost", "root", "", "test ");
$ Mysqli-> query ("set names 'gbk'"); // set it to Chinese encoding.
 
// $ Stmt = $ mysqli-> stmt_init (); // The returned object is a preprocessing object.
 
// Prepare a statement
// $ SQL = "insert into 'test' ('name', 'age', 'dpc') values (?,?,?) "; // Prepare a statement
// $ Stmt-> prepare ($ SQL );
 
// In fact, mysqli itself has the prepare () method. Therefore, the above part can be changed:
 
// Prepare a statement
$ SQL = "insert into 'test' ('name', 'age', 'dpc') values (?,?,?) "; // Prepare a statement
 
$ Stmt = $ mysqli-> prepare ($ SQL); // The stmt object is directly returned.
 
// Bind parameters by placeholder
$ Stmt-> bind_param ("sis", $ name, $ age, $ dpc); // "sis" refers to the parameter data type s: String, I: integer, d: Double precision, B: Large binary
 
// Insert data repeatedly
$ Name = "Chen Hua 1"; // enter the Parameter
$ Age = "25"; // enter the Parameter
$ Dpc = "web Development note writer at www.chhua.com"; // enter the Parameter
$ Stmt-> execute (); // execute
 
$ Name = "Chen Hua 2"; // enter the Parameter
$ Age = "25"; // enter the Parameter
$ Dpc = "web Development note writer at www.chhua.com"; // enter the Parameter
$ Stmt-> execute (); // execute
 
$ Name = "Chen Hua 3"; // enter the Parameter
$ Age = "25"; // enter the Parameter
$ Dpc = "web Development note writer at www.chhua.com"; // enter the Parameter
$ Stmt-> execute (); // execute
 
$ Name = "Chen Hua 4"; // enter the Parameter
$ Age = "25"; // enter the Parameter
$ Dpc = "web Development note writer at www.chhua.com"; // enter the Parameter
$ Stmt-> execute (); // execute
 
Echo "Last inserted id:". $ stmt-> insert_id. "<br> ";
Echo "the last statement affects the number of rows:". $ stmt-> affected_rows;
$ Stmt->

Preprocessing code

<? Php
 
$ Mysqli = new mysqli ("localhost", "root", "", "test ");
$ Mysqli-> query ("set names 'gbk'"); // set it to Chinese encoding.
 
// Prepare a statement
$ SQL = "select * from 'test' where 'id'>? "; // Prepare a statement
 
$ Stmt = $ mysqli-> prepare ($ SQL); // The stmt object is directly returned.
 
// Bind parameters by placeholder
$ Stmt-> bind_param ("I", $ id); // "I" refers to the parameter data type s: String, I: integer, d: Double precision, B: large binary
$ Id = 5;
$ Stmt-> execute (); // execute
$ Stmt-> bind_result ($ id, $ name, $ age, $ dpc); // note that the binding result must correspond to the segment name queried in the query statement.
$ Stmt-> fetch (); // This method obtains the result set information one by one.
While ($ stmt-> fetch ()){
Echo $ name. "----". $ age. "----". $ dpc. "<br> ";
}
$ Stmt-> close (); // close the preprocessing object
?>