maxdb_field_count
maxdb::field_count
(PECL maxdb >= 1.0)
maxdb_field_count -- maxdb::field_count — Returns the number of columns for the most recent query
Описание
Процедурный стиль
$link
)Объектно-ориентированный стиль
Returns the number of columns for the most recent query on the connection
represented by the link
parameter. This function
can be useful when using the maxdb_store_result()
function to determine if the query should have produced a non-empty result
set or not without knowing the nature of the query.
Возвращаемые значения
An integer representing the number of fields in a result set.
Примеры
Пример #1 Объектно-ориентированный стиль
<?php
$maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");
maxdb_report (MAXDB_REPORT_OFF);
$maxdb->query("DROP TABLE friends");
maxdb_report (MAXDB_REPORT_ERROR);
$maxdb->query( "CREATE TABLE friends (id int, name varchar(20))");
$maxdb->query( "INSERT INTO friends VALUES (1,'Hartmut')");
$maxdb->query( "INSERT INTO friends VALUES (2, 'Ulf')");
if ($maxdb->field_count()) {
/* this was a select/show or describe query */
$result = $maxdb->store_result();
/* process resultset */
$row = $result->fetch_row();
/* free resultset */
$result->close();
}
/* close connection */
$maxdb->close();
?>
Пример #2 Процедурный стиль
<?php
$link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");
maxdb_report (MAXDB_REPORT_OFF);
maxdb_query($link,"DROP TABLE friends");
maxdb_report (MAXDB_REPORT_ERROR);
maxdb_query($link, "CREATE TABLE friends (id int, name varchar(20))");
maxdb_query($link, "INSERT INTO friends VALUES (1,'Hartmut')");
maxdb_query($link, "INSERT INTO friends VALUES (2, 'Ulf')");
if (maxdb_field_count($link)) {
/* this was a select/show or describe query */
$result = maxdb_store_result($link);
/* process resultset */
$row = maxdb_fetch_row($result);
/* free resultset */
maxdb_free_result($result);
}
/* close connection */
maxdb_close($link);
?>
The above example produces no output.
- PHP Руководство
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- Расширения для работы с базами данных
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- MaxDB
- maxdb_affected_rows
- maxdb_autocommit
- maxdb_bind_param
- maxdb_bind_result
- maxdb_change_user
- maxdb_character_set_name
- maxdb_client_encoding
- maxdb_close_long_data
- maxdb_close
- maxdb_commit
- maxdb_connect_errno
- maxdb_connect_error
- maxdb_connect
- maxdb_data_seek
- maxdb_debug
- maxdb_disable_reads_from_master
- maxdb_disable_rpl_parse
- maxdb_dump_debug_info
- maxdb_embedded_connect
- maxdb_enable_reads_from_master
- maxdb_enable_rpl_parse
- maxdb_errno
- maxdb_error
- maxdb_escape_string
- maxdb_execute
- maxdb_fetch_array
- maxdb_fetch_assoc
- maxdb_fetch_field_direct
- maxdb_fetch_field
- maxdb_fetch_fields
- maxdb_fetch_lengths
- maxdb_fetch_object
- maxdb_fetch_row
- maxdb_fetch
- maxdb_field_count
- maxdb_field_seek
- maxdb_field_tell
- maxdb_free_result
- maxdb_get_client_info
- maxdb_get_client_version
- maxdb_get_host_info
- maxdb_get_metadata
- maxdb_get_proto_info
- maxdb_get_server_info
- maxdb_get_server_version
- maxdb_info
- maxdb_init
- maxdb_insert_id
- maxdb_kill
- maxdb_master_query
- maxdb_more_results
- maxdb_multi_query
- maxdb_next_result
- maxdb_num_fields
- maxdb_num_rows
- maxdb_options
- maxdb_param_count
- maxdb_ping
- maxdb_prepare
- maxdb_query
- maxdb_real_connect
- maxdb_real_escape_string
- maxdb_real_query
- maxdb_report
- maxdb_rollback
- maxdb_rpl_parse_enabled
- maxdb_rpl_probe
- maxdb_rpl_query_type
- maxdb_select_db
- maxdb_send_long_data
- maxdb_send_query
- maxdb_server_end
- maxdb_server_init
- maxdb_set_opt
- maxdb_sqlstate
- maxdb_ssl_set
- maxdb_stat
- maxdb_stmt_affected_rows
- maxdb_stmt_bind_param
- maxdb_stmt_bind_result
- maxdb_stmt_close_long_data
- maxdb_stmt_close
- maxdb_stmt_data_seek
- maxdb_stmt_errno
- maxdb_stmt_error
- maxdb_stmt_execute
- maxdb_stmt_fetch
- maxdb_stmt_free_result
- maxdb_stmt_init
- maxdb_stmt_num_rows
- maxdb_stmt_param_count
- maxdb_stmt_prepare
- maxdb_stmt_reset
- maxdb_stmt_result_metadata
- maxdb_stmt_send_long_data
- maxdb_stmt_sqlstate
- maxdb_stmt_store_result
- maxdb_store_result
- maxdb_thread_id
- maxdb_thread_safe
- maxdb_use_result
- maxdb_warning_count
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