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(PHP 5 >= 5.5.0)
mysqli::begin_transaction -- mysqli_begin_transaction — Starts a transaction
面向对象风格 (method):
$flags 
   [,  string $name 
   ]] )过程化风格:
$link 
   [,  int $flags 
   [,  string $name 
  ]] )Begins a transaction. Requires MySQL 5.6 and above, and the InnoDB engine (it is enabled by default). For additional details about how MySQL transactions work, see » http://dev.mysql.com/doc/mysql/en/commit.html.
link 仅以过程化样式:由 mysqli_connect() 或 mysqli_init() 返回的链接标识。
flags Valid flags are:
  MYSQLI_TRANS_START_READ_ONLY : 
         Start the transaction as "START TRANSACTION READ ONLY".
        
  MYSQLI_TRANS_START_READ_WRITE : 
         Start the transaction as "START TRANSACTION READ WRITE".
        
  MYSQLI_TRANS_START_WITH_CONSISTENT_SNAPSHOT : 
         Start the transaction as "START TRANSACTION WITH CONSISTENT SNAPSHOT".
        
name Savepoint name for the transaction.
   成功时返回  TRUE , 或者在失败时返回  FALSE 。
  
Example #1 $mysqli->begin_transaction() example
面向对象风格
  <?php
$mysqli  = new  mysqli ( "127.0.0.1" ,  "my_user" ,  "my_password" ,  "sakila" );
if ( $mysqli -> connect_errno ) {
     printf ( "Connect failed: %s\n" ,  $mysqli -> connect_error );
    exit();
}
 $mysqli -> begin_transaction ( MYSQLI_TRANS_START_READ_ONLY );
 $mysqli -> query ( "SELECT first_name, last_name FROM actor" );
 $mysqli -> commit ();
 $mysqli -> close ();
 ?>   过程化风格
  <?php
$link  =  mysqli_connect ( "127.0.0.1" ,  "my_user" ,  "my_password" ,  "sakila" );
if ( mysqli_connect_errno ()) {
     printf ( "Connect failed: %s\n" ,  mysqli_connect_error ());
    exit();
}
 mysqli_begin_transaction ( $link ,  MYSQLI_TRANS_START_READ_ONLY );
 mysqli_query ( $link ,  "SELECT first_name, last_name FROM actor LIMIT 1" );
 mysqli_commit ( $link );
 mysqli_close ( $link );
 ?>