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PHP mysqli: get_warnings() function

mysqli_get_warnings function / mysqli::get_warnings

The mysqli_get_warnings function / mysqli::get_warnings — get result of SHOW WARNINGS

Syntax:

Object oriented style

mysqli_warning mysqli::get_warnings ( void )

Procedural style

mysqli_warning mysqli_get_warnings ( mysqli $link )

Usage: Procedural style

mysqli_get_warnings ( void );

Parameter:

Name Description Required/Optional
connection Specifies the MySQL connection to use. Required

Return value:

Returns an array with connection stats if success, FALSE otherwise.

Version: PHP 5 >= 5.1.0, PHP 7

Example of object oriented style:

<?php
$r = mysqli_query($db, "INSERT INTO blah SET z = '1'"); 
$j = mysqli_warning_count($db); 
if ($j > 0) { 
    $e = mysqli_get_warnings($db); 
    for ($i = 0; $i < $j; $i++) { 
        var_dump($e); 
        $e->next(); 
    } 
} 
?>

Example:

<?php
$r = mysqli_query($con, "INSERT INTO blah SET z = '1'"); 
$j = mysqli_warning_count($con); 
	if ($j > 0) { 
    $e = mysqli_get_warnings($con); 
    for ($i = 0; $i < $j; $i++) { 
        var_dump($e); 
        $e->next(); 
    } 
} 
?>

See also

PHP Function Reference

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Next: info



PHP: Tips of the Day

var_export(): var_export() dumps a PHP parseable representation of the item.

You can pass true as the second parameter to return the contents into a variable.

Example:

<?php
$myarray = [ "PHP", "Tips" ];
$mystring = "PHP Tips";
$myint = 28;

var_export($myarray);
var_export($mystring);
var_export($myint);
?>

Output:

array (
  0 => 'PHP',
  1 => 'Tips',
)'PHP Tips'28

To put the content into a variable, you can do this:

$array_export = var_export($myarray, true);
$string_export = var_export($mystring, true);
$int_export = var_export($myint, 1); // any `Truthy` value

After that, you can output it like this:

printf('$myarray = %s; %s', $array_export, PHP_EOL);
printf('$mystring = %s; %s', $string_export, PHP_EOL);
printf('$myint = %s; %s', $int_export, PHP_EOL);

Example:

<?php
$myarray = [ "PHP", "Tips" ];
$mystring = "PHP Tips";
$myint = 28;
$array_export = var_export($myarray, true);
$string_export = var_export($mystring, true);
$int_export = var_export($myint, 1);
printf('$myarray = %s; %s', $array_export, PHP_EOL);
printf('$mystring = %s; %s', $string_export, PHP_EOL);
printf('$myint = %s; %s', $int_export, PHP_EOL);
?>

This will produce the following output:

Output:

$myarray = array (
  0 => 'PHP',
  1 => 'Tips',
);
$mystring = 'PHP Tips';
$myint = 28;