(PHP 5, PHP 7)
mysqli::$connect_error -- mysqli_connect_error — Returns a string description of the last connect error
面向对象风格
过程化风格
Returns the last error message string from the last call to mysqli_connect().
A string that describes the error. NULL is returned if no error occurred.
Example #1 $mysqli->connect_error example
面向对象风格
<?php
$mysqli = @new mysqli('localhost', 'fake_user', 'my_password', 'my_db');
// Works as of PHP 5.2.9 and 5.3.0.
if ($mysqli->connect_error) {
die('Connect Error: ' . $mysqli->connect_error);
}
?>
过程化风格
<?php
$link = @mysqli_connect('localhost', 'fake_user', 'my_password', 'my_db');
if (!$link) {
die('Connect Error: ' . mysqli_connect_error());
}
?>
以上例程会输出：
Connect Error: Access denied for user 'fake_user'@'localhost' (using password: YES)
The mysqli->connect_error property only works properly as of PHP versions 5.2.9 and 5.3.0. Use the mysqli_connect_error() function if compatibility with earlier PHP versions is required.