mysqli_result::$current_field
mysqli_result::$current_field
mysqli_field_tell
(PHP 5, PHP 7)
mysqli_result :: $ current_field - mysqli_field_tell - 获取结果指针的当前字段偏移量
描述
面向对象的风格
int $mysqli_result->current_field ;
程序风格
int mysqli_field_tell ( mysqli_result $result )
返回用于最后一个mysqli_fetch_field()调用的字段游标的位置。该值可以用作mysqli_field_seek()的参数。
参数
`result`
仅过程风格:由mysqli_query(),mysqli_store_result()或mysqli_use_result()返回的结果集标识符。
返回值
返回字段光标的当前偏移量。
例子
Example#1面向对象的风格
<?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 all columns */
while ($finfo = $result->fetch_field()) {
/* get fieldpointer offset */
$currentfield = $result->current_field;
printf("Column %d:\n", $currentfield
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(
?>
示例#2程序风格
<?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, $query)) {
/* Get field information for all fields */
while ($finfo = mysqli_fetch_field($result)) {
/* get fieldpointer offset */
$currentfield = mysqli_field_tell($result
printf("Column %d:\n", $currentfield
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
?>
上面的例子会输出:
Column 1:
Name: Name
Table: Country
max. Len: 11
Flags: 1
Type: 254
Column 2:
Name: SurfaceArea
Table: Country
max. Len: 10
Flags: 32769
Type: 4