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本文檔使用 php中文網手册 發布
(PHP 5)
mysqli_result::field_seek -- mysqli_field_seek — Set result pointer to a specified field offset
面向对象风格
$fieldnr
)过程化风格
$result
, int $fieldnr
)Sets the field cursor to the given offset. The next call to mysqli_fetch_field() will retrieve the field definition of the column associated with that offset.
Note:
To seek to the beginning of a row, pass an offset value of zero.
result
仅以过程化样式:由 mysqli_query() , mysqli_store_result() 或 mysqli_use_result() 返回的结果集标识。
fieldnr
The field number. This value must be in the range from 0 to number of fields - 1.
成功时返回 TRUE
, 或者在失败时返回 FALSE
。
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();
}
$query = "SELECT Name, SurfaceArea from Country ORDER BY Code LIMIT 5" ;
if ( $result = $mysqli -> query ( $query )) {
$result -> field_seek ( 1 );
$finfo = $result -> fetch_field ();
printf ( "Name: %s\n" , $finfo -> name );
printf ( "Table: %s\n" , $finfo -> table );
printf ( "max. Len: %d\n" , $finfo -> max_length );
printf ( "Flags: %d\n" , $finfo -> flags );
printf ( "Type: %d\n\n" , $finfo -> type );
$result -> 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();
}
$query = "SELECT Name, SurfaceArea from Country ORDER BY Code LIMIT 5" ;
if ( $result = mysqli_query ( $link , $query )) {
mysqli_field_seek ( $result , 1 );
$finfo = mysqli_fetch_field ( $result );
printf ( "Name: %s\n" , $finfo -> name );
printf ( "Table: %s\n" , $finfo -> table );
printf ( "max. Len: %d\n" , $finfo -> max_length );
printf ( "Flags: %d\n" , $finfo -> flags );
printf ( "Type: %d\n\n" , $finfo -> type );
mysqli_free_result ( $result );
}
mysqli_close ( $link );
?>
以上例程会输出:
Name: SurfaceArea Table: Country max. Len: 10 Flags: 32769 Type: 4