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mysqli_warning_count (PHP 5) mysqli_warning_count (no version information, might be only in CVS) mysqli->warning_count -- Returns the number of warnings from the last query for the given link DescriptionProcedural style: int mysqli_warning_count ( mysqli link ) Object oriented style (property): class mysqli { int warning_count }
mysqli_warning_count() returns the number of warnings
from the last query in the connection represented by the
link parameter.
注:
For retrieving warning messages you can use the SQL command
SHOW WARNINGS [limit row_count].
返回值
Number of warnings or zero if there are no warnings.
例例子 1. Object oriented style |
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$mysqli->query("CREATE TABLE myCity LIKE City");
$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();
}
}
$mysqli->close();
?>
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例子 2. Procedural style |
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
mysqli_query($link, "CREATE TABLE myCity LIKE City");
$query = "INSERT INTO myCity (CountryCode, Name) VALUES('GBR',
'Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch')";
mysqli_query($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);
}
}
mysqli_close($link);
?>
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上例将输出： Warning (1264): Data truncated for column 'Name' at row 1 |
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mysqli_use_result