MySQL and PHP
Copyright 1997-2021 the PHP Documentation Group.
mysqli::$warning_count
mysqli_warning_count
Returns the number of warnings from the last query for the given link
Object oriented style
int mysqli->warning_count ;
Procedural style
int mysqli_warning_count(mysqli link);
Returns the number of warnings from the last query in the connection.
For retrieving warning messages you can use the SQL command
SHOW WARNINGS [limit row_count]
.
link
Procedural style only: A link identifier returned by
mysqli_connect
or
mysqli_init
Number of warnings or zero if there are no warnings.
Example 3.69 $mysqli->warning_count
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(); } $mysqli->query("CREATE TABLE myCity LIKE City"); /* a remarkable city in Wales */ $query = "INSERT INTO myCity (CountryCode, Name) VALUES('GBR', 'Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch')"; $mysqli->query($query); if ($mysqli->warning_count) { if ($result = $mysqli->query("SHOW WARNINGS")) { $row = $result->fetch_row(); printf("%s (%d): %s\n", $row[0], $row[1], $row[2]); $result->close(); } } /* close connection */ $mysqli->close(); ?>
Procedural style
<?php $link = mysqli_connect("localhost", "my_user", "my_password", "world"); /* check connection */ if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit(); } mysqli_query($link, "CREATE TABLE myCity LIKE City"); /* a remarkable long city name in Wales */ $query = "INSERT INTO myCity (CountryCode, Name) VALUES('GBR', 'Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch')"; mysqli_query($link, $query); if (mysqli_warning_count($link)) { if ($result = mysqli_query($link, "SHOW WARNINGS")) { $row = mysqli_fetch_row($result); printf("%s (%d): %s\n", $row[0], $row[1], $row[2]); mysqli_free_result($result); } } /* close connection */ mysqli_close($link); ?>
The above examples will output:
Warning (1264): Data truncated for column 'Name' at row 1
mysqli_errno
|
mysqli_error
|
mysqli_sqlstate
|