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(PHP 5)
mysqli_stmt::$error -- mysqli_stmt_error — Returns a string description for last statement error
面向对象风格
过程化风格
$stmt 
   )Returns a string containing the error message for the most recently invoked statement function that can succeed or fail.
stmt 仅以过程化样式:由 mysqli_stmt_init() 返回的 statement 标识。
A string that describes the error. An empty string if no error occurred.
Example #1 面向对象风格
  <?php
 
 $mysqli  = new  mysqli ( "localhost" ,  "my_user" ,  "my_password" ,  "world" );
 
 if ( mysqli_connect_errno ()) {
     printf ( "Connect failed: %s\n" ,  mysqli_connect_error ());
    exit();
}
 $mysqli -> query ( "CREATE TABLE myCountry LIKE Country" );
 $mysqli -> query ( "INSERT INTO myCountry SELECT * FROM Country" );
 $query  =  "SELECT Name, Code FROM myCountry ORDER BY Name" ;
if ( $stmt  =  $mysqli -> prepare ( $query )) {
     
     $mysqli -> query ( "DROP TABLE myCountry" );
     
     $stmt -> execute ();
     printf ( "Error: %s.\n" ,  $stmt -> error );
     
     $stmt -> close ();
}
 
 $mysqli -> close ();
 ?>   Example #2 过程化风格
  <?php
 
 $link  =  mysqli_connect ( "localhost" ,  "my_user" ,  "my_password" ,  "world" );
 
 if ( mysqli_connect_errno ()) {
     printf ( "Connect failed: %s\n" ,  mysqli_connect_error ());
    exit();
}
 mysqli_query ( $link ,  "CREATE TABLE myCountry LIKE Country" );
 mysqli_query ( $link ,  "INSERT INTO myCountry SELECT * FROM Country" );
 $query  =  "SELECT Name, Code FROM myCountry ORDER BY Name" ;
if ( $stmt  =  mysqli_prepare ( $link ,  $query )) {
     
     mysqli_query ( $link ,  "DROP TABLE myCountry" );
     
     mysqli_stmt_execute ( $stmt );
     printf ( "Error: %s.\n" ,  mysqli_stmt_error ( $stmt ));
     
     mysqli_stmt_close ( $stmt );
}
 
 mysqli_close ( $link );
 ?>   以上例程会输出:
Error: Table 'world.myCountry' doesn't exist.