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mysqli::$error_listmysqli_error_list
87
See Also
mysqli_connect_errno
mysqli_connect_error
mysqli_error
mysqli_sqlstate
3.9.16 mysqli::$error_listmysqli_error_list
Copyright 1997-2014 the PHP Documentation Group.
• mysqli::$error_list
mysqli_error_list
Returns a list of errors from the last command executed
Description
Object oriented style
array 
mysqli->error_list ;
Procedural style
array mysqli_error_list(
mysqli link);
Returns a array of errors for the most recent MySQLi function call that can succeed or fail.
Parameters
link
Procedural style only: A link identifier returned by mysqli_connect or
mysqli_init
Return Values
A list of errors, each as an associative array containing the errno, error, and sqlstate.
Examples
Example 3.44 $mysqli->error_list example
Object oriented style
<?php
$mysqli = new mysqli("localhost", "nobody", "");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
if (!$mysqli->query("SET a=1")) {
print_r($mysqli->error_list);
}
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mysqli::$errormysqli_error
88
/* close connection */
$mysqli->close();
?>
Procedural style
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
if (!mysqli_query($link, "SET a=1")) {
print_r(mysqli_error_list($link));
}
/* close connection */
mysqli_close($link);
?>
The above examples will output:
Array
(
[0] => Array
(
[errno] => 1193
[sqlstate] => HY000
[error] => Unknown system variable 'a'
)
)
See Also
mysqli_connect_errno
mysqli_connect_error
mysqli_error
mysqli_sqlstate
3.9.17 mysqli::$errormysqli_error
Copyright 1997-2014 the PHP Documentation Group.
• mysqli::$error
mysqli_error
Returns a string description of the last error
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mysqli::$errormysqli_error
89
Description
Object oriented style
string 
mysqli->error ;
Procedural style
string mysqli_error(
mysqli link);
Returns the last error message for the most recent MySQLi function call that can succeed or fail.
Parameters
link
Procedural style only: A link identifier returned by mysqli_connect or
mysqli_init
Return Values
A string that describes the error. An empty string if no error occurred.
Examples
Example 3.45 $mysqli->error example
Object oriented style
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if ($mysqli->connect_errno) {
printf("Connect failed: %s\n", $mysqli->connect_error);
exit();
}
if (!$mysqli->query("SET a=1")) {
printf("Errormessage: %s\n", $mysqli->error);
}
/* close connection */
$mysqli->close();
?>
Procedural style
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
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mysqli::$field_countmysqli_field_count
90
if (!mysqli_query($link, "SET a=1")) {
printf("Errormessage: %s\n", mysqli_error($link));
}
/* close connection */
mysqli_close($link);
?>
The above examples will output:
Errormessage: Unknown system variable 'a'
See Also
mysqli_connect_errno
mysqli_connect_error
mysqli_errno
mysqli_sqlstate
3.9.18 mysqli::$field_countmysqli_field_count
Copyright 1997-2014 the PHP Documentation Group.
• mysqli::$field_count
mysqli_field_count
Returns the number of columns for the most recent query
Description
Object oriented style
int 
mysqli->field_count ;
Procedural style
int mysqli_field_count(
mysqli link);
Returns the number of columns for the most recent query on the connection represented by the link
parameter. This function can be useful when using the mysqli_store_result function to determine if
the query should have produced a non-empty result set or not without knowing the nature of the query.
Parameters
link
Procedural style only: A link identifier returned by mysqli_connect or
mysqli_init
Return Values
An integer representing the number of fields in a result set.
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mysqli::$field_countmysqli_field_count
91
Examples
Example 3.46 $mysqli->field_count example
Object oriented style
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "test");
$mysqli->query( "DROP TABLE IF EXISTS friends");
$mysqli->query( "CREATE TABLE friends (id int, name varchar(20))");
$mysqli->query( "INSERT INTO friends VALUES (1,'Hartmut'), (2, 'Ulf')");
$mysqli->real_query("SELECT * FROM friends");
if ($mysqli->field_count) {
/* this was a select/show or describe query */
$result = $mysqli->store_result();
/* process resultset */
$row = $result->fetch_row();
/* free resultset */
$result->close();
}
/* close connection */
$mysqli->close();
?>
Procedural style
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "test");
mysqli_query($link, "DROP TABLE IF EXISTS friends");
mysqli_query($link, "CREATE TABLE friends (id int, name varchar(20))");
mysqli_query($link, "INSERT INTO friends VALUES (1,'Hartmut'), (2, 'Ulf')");
mysqli_real_query($link, "SELECT * FROM friends");
if (mysqli_field_count($link)) {
/* this was a select/show or describe query */
$result = mysqli_store_result($link);
/* process resultset */
$row = mysqli_fetch_row($result);
/* free resultset */
mysqli_free_result($result);
}
/* close connection */
mysqli_close($link);
?>
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mysqli::get_charsetmysqli_get_charset
92
3.9.19 mysqli::get_charsetmysqli_get_charset
Copyright 1997-2014 the PHP Documentation Group.
• mysqli::get_charset
mysqli_get_charset
Returns a character set object
Description
Object oriented style
object mysqli::get_charset();
Procedural style
object mysqli_get_charset(
mysqli link);
Returns a character set object providing several properties of the current active character set.
Parameters
link
Procedural style only: A link identifier returned by mysqli_connect or
mysqli_init
Return Values
The function returns a character set object with the following properties:
charset
Character set name
collation
Collation name
dir
Directory the charset description was fetched from (?) or "" for built-in
character sets
min_length
Minimum character length in bytes
max_length
Maximum character length in bytes
number
Internal character set number
state
Character set status (?)
Examples
Example 3.47 mysqli::get_charset example
Object oriented style
<?php
$db = mysqli_init();
$db->real_connect("localhost","root","","test");
var_dump($db->get_charset());
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mysqli::get_client_infomysqli_get_client_info
93
?>
Procedural style
<?php
$db = mysqli_init();
mysqli_real_connect($db, "localhost","root","","test");
var_dump(mysqli_get_charset($db));
?>
The above examples will output:
object(stdClass)#2 (7) {
["charset"]=>
string(6) "latin1"
["collation"]=>
string(17) "latin1_swedish_ci"
["dir"]=>
string(0) ""
["min_length"]=>
int(1)
["max_length"]=>
int(1)
["number"]=>
int(8)
["state"]=>
int(801)
}
See Also
mysqli_character_set_name
mysqli_set_charset
3.9.20 mysqli::get_client_infomysqli_get_client_info
Copyright 1997-2014 the PHP Documentation Group.
• mysqli::get_client_info
mysqli_get_client_info
Get MySQL client info
Description
Object oriented style
string mysqli::get_client_info();
Procedural style
string mysqli_get_client_info(
mysqli_get_client_stats
94
mysqli link);
Returns a string that represents the MySQL client library version.
Return Values
A string that represents the MySQL client library version
Examples
Example 3.48 mysqli_get_client_info
<?php
/* We don't need a connection to determine
the version of mysql client library */
printf("Client library version: %s\n", mysqli_get_client_info());
?>
See Also
mysqli_get_client_version
mysqli_get_server_info
mysqli_get_server_version
3.9.21 mysqli_get_client_stats
Copyright 1997-2014 the PHP Documentation Group.
• mysqli_get_client_stats
Returns client per-process statistics
Description
array mysqli_get_client_stats();
Returns client per-process statistics. Available only with mysqlnd.
Parameters
Return Values
Returns an array with client stats if success, FALSE otherwise.
Examples
Example 3.49 A mysqli_get_client_stats example
<?php
$link = mysqli_connect();
print_r(mysqli_get_client_stats());
?>
mysqli_get_client_stats
95
The above example will output something similar to:
Array
(
[bytes_sent] => 43
[bytes_received] => 80
[packets_sent] => 1
[packets_received] => 2
[protocol_overhead_in] => 8
[protocol_overhead_out] => 4
[bytes_received_ok_packet] => 11
[bytes_received_eof_packet] => 0
[bytes_received_rset_header_packet] => 0
[bytes_received_rset_field_meta_packet] => 0
[bytes_received_rset_row_packet] => 0
[bytes_received_prepare_response_packet] => 0
[bytes_received_change_user_packet] => 0
[packets_sent_command] => 0
[packets_received_ok] => 1
[packets_received_eof] => 0
[packets_received_rset_header] => 0
[packets_received_rset_field_meta] => 0
[packets_received_rset_row] => 0
[packets_received_prepare_response] => 0
[packets_received_change_user] => 0
[result_set_queries] => 0
[non_result_set_queries] => 0
[no_index_used] => 0
[bad_index_used] => 0
[slow_queries] => 0
[buffered_sets] => 0
[unbuffered_sets] => 0
[ps_buffered_sets] => 0
[ps_unbuffered_sets] => 0
[flushed_normal_sets] => 0
[flushed_ps_sets] => 0
[ps_prepared_never_executed] => 0
[ps_prepared_once_executed] => 0
[rows_fetched_from_server_normal] => 0
[rows_fetched_from_server_ps] => 0
[rows_buffered_from_client_normal] => 0
[rows_buffered_from_client_ps] => 0
[rows_fetched_from_client_normal_buffered] => 0
[rows_fetched_from_client_normal_unbuffered] => 0
[rows_fetched_from_client_ps_buffered] => 0
[rows_fetched_from_client_ps_unbuffered] => 0
[rows_fetched_from_client_ps_cursor] => 0
[rows_skipped_normal] => 0
[rows_skipped_ps] => 0
[copy_on_write_saved] => 0
[copy_on_write_performed] => 0
[command_buffer_too_small] => 0
[connect_success] => 1
[connect_failure] => 0
[connection_reused] => 0
[reconnect] => 0
[pconnect_success] => 0
[active_connections] => 1
[active_persistent_connections] => 0
[explicit_close] => 0
[implicit_close] => 0
[disconnect_close] => 0
[in_middle_of_command_close] => 0
mysqli_get_client_stats
96
[explicit_free_result] => 0
[implicit_free_result] => 0
[explicit_stmt_close] => 0
[implicit_stmt_close] => 0
[mem_emalloc_count] => 0
[mem_emalloc_ammount] => 0
[mem_ecalloc_count] => 0
[mem_ecalloc_ammount] => 0
[mem_erealloc_count] => 0
[mem_erealloc_ammount] => 0
[mem_efree_count] => 0
[mem_malloc_count] => 0
[mem_malloc_ammount] => 0
[mem_calloc_count] => 0
[mem_calloc_ammount] => 0
[mem_realloc_count] => 0
[mem_realloc_ammount] => 0
[mem_free_count] => 0
[proto_text_fetched_null] => 0
[proto_text_fetched_bit] => 0
[proto_text_fetched_tinyint] => 0
[proto_text_fetched_short] => 0
[proto_text_fetched_int24] => 0
[proto_text_fetched_int] => 0
[proto_text_fetched_bigint] => 0
[proto_text_fetched_decimal] => 0
[proto_text_fetched_float] => 0
[proto_text_fetched_double] => 0
[proto_text_fetched_date] => 0
[proto_text_fetched_year] => 0
[proto_text_fetched_time] => 0
[proto_text_fetched_datetime] => 0
[proto_text_fetched_timestamp] => 0
[proto_text_fetched_string] => 0
[proto_text_fetched_blob] => 0
[proto_text_fetched_enum] => 0
[proto_text_fetched_set] => 0
[proto_text_fetched_geometry] => 0
[proto_text_fetched_other] => 0
[proto_binary_fetched_null] => 0
[proto_binary_fetched_bit] => 0
[proto_binary_fetched_tinyint] => 0
[proto_binary_fetched_short] => 0
[proto_binary_fetched_int24] => 0
[proto_binary_fetched_int] => 0
[proto_binary_fetched_bigint] => 0
[proto_binary_fetched_decimal] => 0
[proto_binary_fetched_float] => 0
[proto_binary_fetched_double] => 0
[proto_binary_fetched_date] => 0
[proto_binary_fetched_year] => 0
[proto_binary_fetched_time] => 0
[proto_binary_fetched_datetime] => 0
[proto_binary_fetched_timestamp] => 0
[proto_binary_fetched_string] => 0
[proto_binary_fetched_blob] => 0
[proto_binary_fetched_enum] => 0
[proto_binary_fetched_set] => 0
[proto_binary_fetched_geometry] => 0
[proto_binary_fetched_other] => 0
)
See Also
Stats description
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