mysqli_field_seek
(PHP 5)
mysqli_field_seek
(no version information, might be only in CVS)
result->field_seek --
Set result pointer to a specified field offset
Description
Procedural style:
int
mysqli_field_seek ( mysqli_result result, int fieldnr )
Object oriented style (method):
class
mysqli_result {
int
field_seek ( 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.
注: To seek to the beginning of a row, pass an offset value of zero.
返回值
mysqli_field_seek() returns previuos value of field cursor.
例
例子 1. Object oriented style
<?php $mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */ 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)) {
/* Get field information for 2nd column */ $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(); }
/* close connection */ $mysqli->close(); ?>
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例子 2. Procedural style
<?php $link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */ 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, $query)) {
/* Get field information for 2nd column */ mysqli_field_seek($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); }
/* close connection */ mysqli_close($link); ?>
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上例将输出:
Name: SurfaceArea
Table: Country
max. Len: 10
Flags: 32769
Type: 4 |