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
Description
Procedural style
$link
)Object oriented style
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.
Return Values
An integer representing the number of fields in a result set.
Examples
Example #1 Object oriented style
<?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();
?>
Example #2 Procedural style
<?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
- Расширения для работы с базами данных отдельных производителей
- 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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