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
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 statement 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:
| 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. |
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 />";
}
?>