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    mysql_errno

    (PHP 4, PHP 5)

    mysql_errno — Returns the numerical value of the error message from previous MySQL operation

    Warning

    This extension was deprecated in PHP 5.5.0, and it was removed in PHP 7.0.0. Instead, the MySQLi or PDO_MySQL extension should be used. See also MySQL: choosing an API guide. Alternatives to this function include:

    Description

    mysql_errno(resource $link_identifier = NULL): int

    Returns the error number from the last MySQL function.

    Errors coming back from the MySQL database backend no longer issue warnings. Instead, use mysql_errno() to retrieve the error code. Note that this function only returns the error code from the most recently executed MySQL function (not including mysql_error() and mysql_errno()), so if you want to use it, make sure you check the value before calling another MySQL function.

    Parameters

    link_identifier

    The MySQL connection. If the link identifier is not specified, the last link opened by mysql_connect() is assumed. If no such link is found, it will try to create one as if mysql_connect() had been called with no arguments. If no connection is found or established, an E_WARNING level error is generated.

    Return Values

    Returns the error number from the last MySQL function, or 0 (zero) if no error occurred.

    Examples

    Example #1 mysql_errno() example

    <?php
    $link     = mysql_connect("localhost", "mysql_user", "mysql_password");

    if (!    mysql_select_db("nonexistentdb", $link)) {
    echo     mysql_errno($link) . ": " . mysql_error($link). "\n";
    }

    mysql_select_db("kossu", $link);
    if (!    mysql_query("SELECT * FROM nonexistenttable", $link)) {
    echo     mysql_errno($link) . ": " . mysql_error($link) . "\n";
    }
    ?>

    The above example will output something similar to:

    1049: Unknown database 'nonexistentdb'
1146: Table 'kossu.nonexistenttable' doesn't exist

    See Also

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    User Contributed Notes 3 notes

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    -2
    apoio at cyberspace dot org
    24 years ago
    All mysqld error messages are located into the file /usr/local/share/mysql/english/errmsg.txt and listed in numerical order from 999 to 1175. You can change the output language as well, issuing the '-L spanish' option for example. See the manual for more details.
    up
    -3
    timstamp.co.uk
    17 years ago
    If you are receiving errors like:
    Warning: mysql_close(): 5 is not a valid MySQL-Link resource

    Check that you are calling mysql_error() and mysql_errno() BEFORE you call mysql_close().
    up
    -9
    simon at paarlberg dot dk
    18 years ago
    Function for creating unique md5 keys in a database. If there are duplets, then a new md5-key will be generated. For your use:

      function users_md5create($id){
        global $mysql_link;

        while ($done==0) {
          $md5key = md5(time().($id/2).$loop).md5(time().$id.$loop);
          $query = "INSERT INTO users_md5create SET md5key='$md5key', fkey='$id', created=UNIX_TIMESTAMP() ";
          $mysql_result = mysql_query($query, $mysql_link);
          if(mysql_errno($mysql_link)!=1062) $done=1;
          $loop++;
        }

        return($md5key);
      }
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