PHP mysqli_stmt get_warnings() Method

The PHP mysqli_stmt::get_warnings() / mysqli_stmt_get_warnings() function is used to get result of SHOW WARNINGS.

Syntax

//Object-oriented style
public mysqli_stmt::get_warnings()

//Procedural style
mysqli_stmt_get_warnings(statement)

Parameters

statement Required. For procedural style only: Specify a mysqli_stmt object returned by mysqli_stmt_init().

Return Value

Returns a mysqli_warning object.

Example: Object-oriented style

The example below shows the usage of mysqli_stmt::get_warnings() method.

<?php
//establishing connection to the database
$mysqli = new mysqli("localhost", "user", "password", "database");
if ($mysqli->connect_errno) {
  echo "Failed to connect to MySQL: ". $mysqli->connect_error;
  exit();
}

//creating a prepared statement
$stmt = $mysqli->stmt_init();
$query = "INSERT INTO Employee SET z = '1'";
$stmt->prepare($query);

//executing the SQL statement
$stmt->execute();

//getting the warning
$warning = $stmt->get_warnings();;

//displaying the warning
echo "Warning: \n";
print_r($warning);

//closing the connection
$mysqli->close();
?>

The output of the above code will be similar to:

Warning:
mysqli_warning Object
(
    [message] => Unknown system variable 'z'
    [sqlstate] => HY000
    [errno] => 1193
)

Example: Procedural style

The example below shows the usage of mysqli_stmt_get_warnings() function.

<?php
//establishing connection to the database
$mysqli = mysqli_connect("localhost", "user", "password", "database");
if (mysqli_connect_errno()) {
  echo "Failed to connect to MySQL: ". mysqli_connect_error();
  exit();
}

//creating a prepared statement
$stmt = mysqli_stmt_init($mysqli);
$query = "INSERT INTO Employee SET z = '1'";
mysqli_stmt_prepare($stmt, $query);

//executing the SQL statement
mysqli_stmt_execute($stmt);

//getting the warning
$warning = mysqli_stmt_get_warnings($stmt);;

//displaying the warning
echo "Warning: \n";
print_r($warning);

//closing the connection
mysqli_close($mysqli);
?>

The output of the above code will be similar to:

Warning:
mysqli_warning Object
(
    [message] => Unknown system variable 'z'
    [sqlstate] => HY000
    [errno] => 1193
)

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