International PHP Conference Berlin 2021


(PHP 4, PHP 5)

mysql_errnoReturns the numerical value of the error message from previous MySQL operation


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 and related FAQ for more information. Alternatives to this function include:


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.



MySQL bağlantısı. Eğer bağlantı belirteci belirtilmemişse mysql_connect() tarafından açılan son bağlantı kullanılmaya çalışılır. Eğer böyle bir bağlantı yoksa mysql_connect() değiştirgesiz olarak çağrılmış gibi bir bağlantı oluşturmaya çalışır. Hiçbir bağlantı yoksa ve yenisi de kurulamazsa E_WARNING seviyesinde bir hata üretilir.

Dönen Değerler

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


Örnek 1 mysql_errno() example


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

if (!
mysql_query("SELECT * FROM nonexistenttable"$link)) {
mysql_errno($link) . ": " mysql_error($link) . "\n";

Yukarıdaki örnek şuna benzer bir çıktı üretir:

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

Ayrıca Bakınız

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User Contributed Notes 3 notes

apoio at cyberspace dot org
20 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.
13 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().
simon at paarlberg dot dk
15 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;

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