Php/docs/function.sqlsrv-num-fields
sqlsrv_num_fields
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sqlsrv_num_fields — Retrieves the number of fields (columns) on a statement
说明
sqlsrv_num_fields
( resource $stmt
) : mixed
Retrieves the number of fields (columns) on a statement.
参数
stmt- The statement for which the number of fields is returned. sqlsrv_num_fields() can be called on a statement before or after statement execution.
返回值
Returns the number of fields on success. Returns false otherwise.
范例
Example #1 sqlsrv_num_fields() example
<?php$serverName = "serverName\sqlexpress";$connectionInfo = array( "Database"=>"dbName", "UID"=>"username", "PWD"=>"password");$conn = sqlsrv_connect( $serverName, $connectionInfo);if( $conn === false ) { die( print_r( sqlsrv_errors(), true));}$sql = "SELECT * FROM Table_1";$stmt = sqlsrv_query($conn, $sql);if( $stmt === false) { die( print_r( sqlsrv_errors(), true));}$numFields = sqlsrv_num_fields( $stmt );while( sqlsrv_fetch( $stmt )) { // Iterate through the fields of each row. for($i = 0; $i < $numFields; $i++) { echo sqlsrv_get_field($stmt, $i)." "; } echo "<br />";}?>
参见
- sqlsrv_field_metadata() - Retrieves metadata for the fields of a statement prepared by sqlsrv_prepare or sqlsrv_query
- sqlsrv_fetch() - Makes the next row in a result set available for reading
- sqlsrv_get_field() - Gets field data from the currently selected row
