PHP | mysqli_error_list() Function

PHP mysqli_error_list() Function


Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP mysqli_error_list() Function.

The mysqli_error_list() function returns the list of errors which occurred during the last MYSQLi function call.

Syntax

Following below is the syntax to use this function -

mysqli_error_list($con)


Parameter Details

Sr.NoParameter & Description
1

con(Mandatory)

This is an object representing a connection to MySQL Server.


Return Value

This function returns a list representing the errors (each of the error as an array) during the execution of the last function call.

PHP Version

This PHP function was first introduced in PHP version 5 and it works in all the later versions.

Example1

The following example illustrates the usage of the PHP mysqli_error_list() function (in a procedural style) -

<?php
   //Creating a connection
   $con = mysqli_connect("localhost", "root", "password", "mydb");

   mysqli_query($con, "CREATE TABLE Test(Name VARCHAR(10), AGE INT)");


   //Executing the query
   $query = "INSERT into Test values('Kennedy', 27),('Paul', 30),('Blessing Dauglas Queen Mikel', 25)";
   mysqli_query($con, $query);

   //Error
   $list = mysqli_error_list($con);
   print_r($list);

   //Closing the connection
   mysqli_close($con);
?>

Output

When the above code is executed, it will produce the following result -

Array
(
    [0] => Array
        (
            [errno] => 1406
            [sqlstate] => 22001
            [error] => Data too long for column 'Name' at row 3
        )

)

Example2

In an object oriented style the syntax of this PHP function is $con->error_list(); Following is the example of this function in an object oriented style $minus;

<?php
   //Creating a connection
   $con = new mysqli("localhost", "root", "password", "mydb");

   //Query to retrieve all the rows of employee table
   $con -> query("SELECT * FROM wrong_table_name");
  
   //Error 
   $list = $con->error_list;

   print_r($list);

   //Closing the connection
   $con -> close();
?>

Output

When the above code is executed, it will produce the following result -

Array
(
    [0] => Array
        (
            [errno] => 1146
            [sqlstate] => 42S02
            [error] => Table 'mydb.wrong_table_name' doesn't exist
        )

)

Example3

Assume we have a table named employee with the following content -

mysql> select * from employee;
+------------+--------------+------+------+--------+
| FIRST_NAME | LAST_NAME    | AGE  | SEX  | INCOME |
+------------+--------------+------+------+--------+
| Kennedy    | Nkpara       |   27 | M    |  16000 |
| Justice    | Dauglas      |   27 | M    |  13300 |
| Justice    | Donald       |   28 | M    |  31000 |
| Stephanie  | Francis      |   23 | F    |   2256 |
| Bethel     | Igwela       |   27 | M    |  15000 |
+------------+--------------+------+------+--------+
5 rows in set (0.06 sec)

Following is another example of the built-in PHP mysqli_error_list() function -

<?php
   //Creating a connection
   $con = mysqli_connect("localhost", "root", "password", "mydb");

   //Query to SELECT all the rows of the employee table
   mysqli_query($con, "SELECT * FROM employee");
   $list = mysqli_error_list($con);
   print_r($list);

   //Query to UPDATE the rows of the employee table
   mysqli_query($con, "UPDATE employee set INCOME=INCOME+5000 where FIRST_NAME in (*)");
   $list = mysqli_error_list($con);
   print_r($list);

   //Query to INSERT a row into the employee table
   mysqli_query($con, "INSERT INTO employee VALUES (Precious, 'Amah', 25, 'F', 13000, 106)");
   $list = mysqli_error_list($con);
   print_r($list);

   //Closing the connection
   mysqli_close($con);
?>

Output

When the above code is executed, it will produce the following result -

Array
(
)
Array
(
    [0] => Array
        (
            [errno] => 1064
            [sqlstate] => 42000
            [error] => You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '*)' at line 1
        )

)
Array
(
    [0] => Array
        (
            [errno] => 1136
            [sqlstate] => 21S01
            [error] => Column count doesn't match value count at row 1
        )

)


Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial, we are going to be studying about the PHP mysqli_field_count() Function.

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