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PHP : Function Reference : MaxDB PHP Extension : maxdb_field_count

maxdb_field_count

Returns the number of columns for the most recent query (PECL maxdb:1.0-7.6.00.38)
int maxdb_field_count ( resource link )

Procedural style:

Object oriented style (method):

maxdb {
  int field_count();
}

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 1204. 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 1205. 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.

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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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