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mysqli_warning_count

Returns the number of warnings from the last query for the given link (PHP 5)
int mysqli_warning_count ( mysqli link )

Procedural style:

Object oriented style (property):

mysqli {
  int warning_count ;
}

Returns the number of warnings from the last query in the connection.

Note:

For retrieving warning messages you can use the SQL command SHOW WARNINGS [limit row_count].

Parameters

link

Procedural style only: A link identifier returned by mysqli_connect() or mysqli_init()

Return Values

Number of warnings or zero if there are no warnings.

Examples

Example 1587. 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();
?>


Example 1588. 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 example will output:

Warning (1264): Data truncated for column 'Name' at row 1