# sqlsrv_field_metadata

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sqlsrv_field_metadata — Retrieves metadata for the fields of a statement prepared by sqlsrv_prepare() or sqlsrv_query()

### 说明

sqlsrv_field_metadata ( resource `$stmt` ) : mixed

Retrieves metadata for the fields of a statement prepared by sqlsrv_prepare() or sqlsrv_query(). sqlsrv_field_metadata() can be called on a statement before or after statement execution.

### 参数

`stmt`

  The statment resource for which metadata is returned.

### 返回值

Returns an array of arrays on success. Otherwise, `FALSE` is returned. Each returned array is described by the following table:

Array returned by sqlsrv_field_metadata
Key | Description
--- | ---
Name | The name of the field.
Type | The numeric value for the SQL type.
Size | The number of characters for fields of character type, the number of bytes for fields of binary type, or `NULL` for other types.
Precision | The precision for types of variable precision, `NULL` for other types.
Scale | The scale for types of variable scale, `NULL` for other types.
Nullable | An enumeration indicating whether the column is nullable, not nullable, or if it is not known.

For more information, see » sqlsrv_field_metadata in the Microsoft SQLSRV documentation.

### 范例

Example #1 sqlsrv_field_metadata() example

    <?php
    $serverName = "serverName\sqlexpress";
    $connectionInfo = array( "Database"=>"AdventureWorks", "UID"=>"username", "PWD"=>"password");
    $conn = sqlsrv_connect( $serverName, $connectionInfo);
    if( $conn === false ) {
       die( print_r( sqlsrv_errors(), true));
    }

    $sql = "SELECT * FROM Table_1";
    $stmt = sqlsrv_prepare( $conn, $sql );

    foreach( sqlsrv_field_metadata( $stmt ) as $fieldMetadata ) {
        foreach( $fieldMetadata as $name => $value) {
           echo "$name: $value<br />";
        }
          echo "<br />";
    }
    ?>

### 参见

- sqlsrv_client_info() - Returns information about the client and specified connection