Php/docs/mysqli-result.current-field

• PHP Manual
• mysqli_result
• Get current field offset of a result pointer

mysqli_result::$current_field

mysqli_field_tell

(PHP 5, PHP 7)

mysqli_result::$current_field -- mysqli_field_tell — Get current field offset of a result pointer

说明

面向对象风格

int $mysqli_result->current_field

过程化风格

mysqli_field_tell ( mysqli_result $result ) : int

Returns the position of the field cursor used for the last mysqli_fetch_field() call. This value can be used as an argument to mysqli_field_seek().

参数

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。

返回值

Returns current offset of field cursor.

范例

Example #1 面向对象风格

<?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();?>

Example #2 过程化风格

<?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);?>

以上例程会输出：

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

参见

• mysqli_fetch_field() - Returns the next field in the result set
• mysqli_field_seek() - Set result pointer to a specified field offset