(PHP 4, PHP 5)

mysql_queryПосылает запрос MySQL


resource mysql_query ( string $query [, resource $link_identifier = NULL ] )

mysql_query() посылает один запрос (посылка нескольких запросов не поддерживается) активной базе данных сервера, на который ссылается переданный дескриптор link_identifier.

Список параметров



Запрос не должен заканчиваться точкой с запятой. Данные в запросе должны быть корректно проэкранированы.


Соединение MySQL. Если идентификатор соединения не был указан, используется последнее соединение, открытое mysql_connect(). Если такое соединение не было найдено, функция попытается создать таковое, как если бы mysql_connect() была вызвана без параметров. Если соединение не было найдено и не смогло быть создано, генерируется ошибка уровня E_WARNING.

Возвращаемые значения

Для запросов SELECT, SHOW, DESCRIBE, EXPLAIN и других запросов, возвращающих результат из нескольких рядов, mysql_query() возвращает дескриптор результата запроса (resource), или FALSE в случае ошибки.

Для других типов SQL-запросов, INSERT, UPDATE, DELETE, DROP и других, mysql_query() возвращает TRUE в случае успеха и FALSE в случае ошибки.

Полученный дескриптор результата нужно передать в функцию mysql_fetch_assoc() или любую другую функцию, работающую с результатами запросов.

Используйте mysql_num_rows() для выяснения количества рядов в результате SELECT-запроса или mysql_affected_rows() для выяснения количества обработанных рядов запросами DELETE, INSERT, REPLACE и UPDATE.

mysql_query() также завершится с ошибкой и вернет FALSE, если у пользователя нет доступа к какой-либо из таблиц, фигурирующих в запросе.


Пример #1 Неверный запрос

Следующий запрос составлен неправильно и mysql_query() вернёт FALSE.

mysql_query('SELECT * WHERE 1 = 1');
if (!
$result) {
'Неверный запрос: ' mysql_error());


Пример #2 Верный запрос

Следующий запрос верен, поэтому mysql_query() вернет resource.

// Эти данные, к примеру, могли быть получены от пользователя
$firstname 'fred';
$lastname  'fox';

// Формируем запрос
// Это лучший способ выполнить SQL-запрос
// Еще примеры можно найти в документации mysql_real_escape_string()
$query sprintf("SELECT firstname, lastname, address, age FROM friends 
    WHERE firstname='%s' AND lastname='%s'"

// Выполняем запрос
$result mysql_query($query);

// Проверяем результат
// Это показывает реальный запрос, посланный к MySQL, а также ошибку. Удобно при отладке.
if (!$result) {
$message  'Неверный запрос: ' mysql_error() . "\n";
$message .= 'Запрос целиком: ' $query;

// Используем результат
// Попытка напечатать $result не выведет информацию, которая в нем хранится
// Необходимо использовать какую-либо mysql-функцию, работающую с результатом запроса
// См. также mysql_result(), mysql_fetch_array(), mysql_fetch_row() и т.п.
while ($row mysql_fetch_assoc($result)) {

// Освобождаем ресурсы, ассоциированные с результатом
// Это делается автоматически в конце скрипта

Смотрите также

  • mysql_connect() - Открывает соединение с сервером MySQL
  • mysql_error() - Возвращает текст ошибки последней операции с MySQL
  • mysql_real_escape_string() - Экранирует специальные символы в строках для использования в выражениях SQL
  • mysql_result() - Возвращает данные результата запроса
  • mysql_fetch_assoc() - Возвращает ряд результата запроса в качестве ассоциативного массива
  • mysql_unbuffered_query() - Посылает запрос MySQL без авто-обработки результата и его буферизации


When trying to INSERT or UPDATE and trying to put a large amount of text or data (blob) into a mysql table you might run into problems.

In mysql.err you might see:
Packet too large (73904)

To fix you just have to start up mysql with the option -O max_allowed_packet=maxsize 

You would just replace maxsize with the max size you want to insert, the default is 65536
2000-01-02 02:38:48
One way to reduce the dangers of queries like the dlete command above that dletes the whole DB is to use limits wherever possible. 

EG. If you have a routine that is only deisnged to delete 1 record, add 'LIMIT 1' to the end of the command. This way you'll only lose one record if someone does something stupid.

You should also check all input, especially if it is sent using GET. ie. make sure that $_GET['id'] is not NULL or == "", is a number that is positive, not 0 (generally, I know this doesn't apply to some table types, but it applies to the default) and is within the valid range for that field.

Just don't trust ANY data that is sent to your script.

2003-03-28 07:35:21
Until this function prohibits them, watch out for SQL comments (--) in your input.
2003-04-09 03:43:02
Regarding the idea for returning all possible values of an enum field, the mySQL manual says that "SHOW COLUMNS FROM table LIKE column" should be used to do this.

The function below (presumes db connection) will return an array of the possible values of an enum.

function GetEnumValues($Table,$Column)
    $dbSQL = "SHOW COLUMNS FROM ".$Table." LIKE '".$Column."'";
    $dbQuery = mysql_query($dbSQL);

    $dbRow = mysql_fetch_assoc($dbQuery);
    $EnumValues = $dbRow["Type"];

    $EnumValues = substr($EnumValues, 6, strlen($EnumValues)-8); 
    $EnumValues = str_replace("','",",",$EnumValues);

    return explode(",",$EnumValues);


1) If the LIKE matches more than one column you get the enum from the first, so be careful with the $Column argument
2) You can't have ',' as part of one of the enums (I guess mySQL would escape this, but I haven't tried)
3) If the field isn't an enum you'll get garbage back!

This is just a quick example to show how to do it, some tidying up needs to be done (ie checking if the field is actually an enum) before it is perfect.
2003-04-19 15:30:01
Windows programmers, keep in mind that although table names in Windows queries are not case sensitive, many *NIX versions of Mysql require the correct table name case (perhaps others as well). So you're better off using the right case from the beginning, in case you ever decide to go with a *NIX server.
2003-04-30 21:28:17
If you need to execute sevaral SQL commands in a row (usually called batcg SQL) using PHP you canot use mysql_query() since it can execute single command only.

Here is simple but effective function that can run batch SQL commands. Take cere, if string contains semicolon (;) anywhere except as command delimiter (within string expression for example) function will not work.

function mysql_exec_batch ($p_query, $p_transaction_safe = true) {
  if ($p_transaction_safe) {
      $p_query = 'START TRANSACTION;' . $p_query . '; COMMIT;';
  $query_split = preg_split ("/[;]+/", $p_query);
  foreach ($query_split as $command_line) {
    $command_line = trim($command_line);
    if ($command_line != '') {
      $query_result = mysql_query($command_line);
      if ($query_result == 0) {
  return $query_result;
2003-11-30 18:52:48
I think it's important to note (for newbies, like me especially) that an empty result is not the same as an error:
/* 'bar' is an empty table in the db */
$rs mysql_query("SELECT `foo` FROM `bar`")
$rs) {
mysql_num_rows($rs); //outputs: 0

/* malformed query /*
$rs = mysql_query("SELECT `foo` FRO `bar`");
if($rs) {
  echo "This will never be echoed";
2005-01-25 19:25:52
The following query is not valid as expected:
$username{4} = '';
$sql "SELECT * FROM `user` WHERE `User` = '$username'";
$sql); // Result: SELECT * FROM `user` WHERE `User` = 'dictworld'
$res mysql_query($query);
$row mysql_fetch_array($res);
print_r($row);// Result: still return Array(), supposed that the user 'dictworld' exists.
Pay more attention that null string '' is equivalent to '\0',therefore SQL statement above is equivalent to SELECT * FROM `user` WHERE `User` = 'dict\0world',though printing string is right.
2005-04-30 19:21:46
here's a script for parsing a *.sql file (tested only on dumps created with phpMyAdmin) which is short and simple (why do people say "here's a short and simple script" and it has a 100 lines?). the script skips comments and allows ; to be present within the querys

function parse_mysql_dump($url){
$file_content file($url);
$query "";
$file_content as $sql_line){
trim($sql_line) != "" && strpos($sql_line"--") === false){
$query .= $sql_line;
$result mysql_query($query)or die(mysql_error());
$query "";
2005-08-14 06:07:37
I believe there is a typo in celtic at raven-blue dot com version with:

if (($sql != "") && (substr($tsl, 0, 2) != "--") && (substr($tsl, 0, 1) != "#")) {

I think you really ment: 

if (($tsl != "") && (substr($tsl, 0, 2) != "--") && (substr($tsl, 0, 1) != "#")) {

I changed the $sql to $tsl
2005-10-01 18:30:31
If, like me, you come from perl, you may not like having to use sprintf to 'simulate' placeholders that the DBI package from perl provides. I have created the following wrapper function for mysql_query() that allows you to use '?' characters to substitute values in your DB queries. Note that this is not how DBI in perl handles placeholders, but it's pretty similar.

// mysql_query() wrapper. takes two arguments. first
    // is the query with '?' placeholders in it. second argument
    // is an array containing the values to substitute in place
    // of the placeholders (in order, of course).
function mysql_prepare ($query$phs = array()) {
        foreach (
$phs as $ph) {
$ph "'" mysql_real_escape_string($ph) . "'";
$query substr_replace(
$query$phstrpos($query'?'), 1


// sample usage
list($user$passwd) = array('myuser''mypass');

$sth mysql_prepare(
'select userid from users where userid=? and passwd=?',
$row mysql_fetch_row($sth);

// successfull username & password authentication
if ($row !== false) {
"logging in as '{$row[0]}'!\n";

// oops, wrong userid or passwd
else {
"Invalid username and password combination.\n";
2006-02-23 01:11:27
Note that the 'source' command used in the mysql client program is *not* a feature of the server but of the client.
This means that you cannot do
   mysql_query('source myfile.sql');
You will get a syntax error. Use LOAD DATA INFILE as an alternative.
2006-07-07 05:38:44
Here's a parameterised query function for MySQL similar to pg_query_params, I've been using something similar for a while now and while there is a slight drop in speed, it's far better than making a mistake escaping the parameters of your query and allowing an SQL injection attack on your server.

<?php   # Parameterised query implementation for MySQL (similar PostgreSQL's PHP function pg_query_params)
        # Example: mysql_query_params( "SELECT * FROM my_table WHERE col1=$1 AND col2=$2", array( 42, "It's ok" ) );

if( !function_exists'mysql_query_params' ) ) {

mysql_query_params__callback$at ) {

mysql_query_params$query$parameters=array(), $database=false ) {

// Escape parameters as required & build parameters for callback function
global $mysql_query_params__parameters;
$parameters as $k=>$v )
$parameters[$k] = ( is_int$v ) ? $v : ( NULL===$v 'NULL' "'".mysql_real_escape_string$v )."'" ) );
$mysql_query_params__parameters $parameters;

// Call using mysql_query
if( false===$database )
mysql_querypreg_replace_callback'/\$([0-9]+)/''mysql_query_params__callback'$query ) );
                        else    return 
mysql_querypreg_replace_callback'/\$([0-9]+)/''mysql_query_params__callback'$query ), $database );


2006-09-02 08:39:06
this could be a nice way to print values from 2 tables with a foreign key. i have not yet tested correctly but it should work fine.

$buscar = mysql_query("SELECT k.*, e.Clasificacion FROM cat_plan_k k, cat_equipo e WHERE Tipo='$tipo' AND k.ID_Eq=a.ID_Eq"); 
    while ($row=mysql_fetch_array($buscar))
            $nombre = "e.Clasificacion"; 
            $row[$nombre] = $Clasific; echo $row[$nombre].'convertido en '.$Clasific;
2006-10-04 12:35:14
Simulating an atomic operation for application locks using mysql.

$link = mysql_connect('localhost', 'user', 'pass');
if (!$link) {
    die('Not connected : ' . mysql_error());

// make foo the current db
$db_selected = mysql_select_db('foo', $link);
if (!$db_selected) {
    die ('Can\'t use foo : ' . mysql_error());

$q = "update `table` set `LOCK`='F' where `ID`='1'";
$lock = mysql_affected_rows();

If we assume
     NOT LOCKED = "" (empty string)
     LOCKED = 'F'

then if the column LOCK had a value other than F (normally should be an empty string) the update statement sets it to F and set the affected rows to 1. Which mean than we got the lock.
If affected rows return 0 then the value of that column was already F and somebody else has the lock.

The secret lies in the following statement taken from the mysql manual:
"If you set a column to the value it currently has, MySQL notices this and does not update it."

Of course all this is possible if the all application processes agree on the locking algorithm.
2007-08-01 21:13:51
mysql_query doesnt support multiple queries, a way round this is to use innodb and transactions

this db class/function will accept an array of arrays of querys, it will auto check every line for affected rows in db, if one is 0 it will rollback and return false, else it will commit and return true, the call to the function is simple and is easy to read etc

class MySQLDB
   private $connection;          // The MySQL database connection

   /* Class constructor */
   function MySQLDB(){
      /* Make connection to database */
      $this->connection = mysql_connect(DB_SERVER, DB_USER, DB_PASS) or die(mysql_error());
      mysql_select_db(DB_NAME, $this->connection) or die(mysql_error());

   /* Transactions functions */

   function begin(){
      $null = mysql_query("START TRANSACTION", $this->connection);
      return mysql_query("BEGIN", $this->connection);

   function commit(){
      return mysql_query("COMMIT", $this->connection);
   function rollback(){
      return mysql_query("ROLLBACK", $this->connection);

   function transaction($q_array){
         $retval = 1;


         foreach($q_array as $qa){
            $result = mysql_query($qa['query'], $this->connection);
            if(mysql_affected_rows() == 0){ $retval = 0; }

      if($retval == 0){
         return false;
         return true;


/* Create database connection object */
$database = new MySQLDB;

// then from anywhere else simply put the transaction queries in an array or arrays like this:

   function function(){
      global $database;

      $q = array ( 
         array("query" => "UPDATE table WHERE something = 'something'"),
         array("query" => "UPDATE table WHERE something_else = 'something_else'"),
         array("query" => "DELETE FROM table WHERE something_else2 = 'something_else2'"),


2007-08-09 05:53:30
Keep in mind when dealing with PHP & MySQL that sending a null-terminated string to a MySQL query can be misleading if you use echo($sql) in PHP because the null terminator may not be visible.

For example (this assumes connection is already made),
$string1 = "mystring\0";
$string2 = "mystring";

$query1 = "SELECT * FROM table WHERE mystring='".$string1."'"
$query2 = "SELECT * FROM table WHERE mystring='".$string2."'"
$result1 = mysql_query($query1);

$result2 = mysql_query($query2);

//$result1 IS NOT EQUAL TO $result2 but will not provide an error

//but printing these queries to the screen will provide the same result

Not knowing this could lead to some mind-numbing troubleshooting when dealing with any strings with a null terminator.  So now you know! :)
2007-11-17 12:00:29
For all you programmers out there getting the 'Command out of synch' errors when executing a stored procedure call:

There are known bugs related to this issue, and the best workaround for avoiding this error seems to be switching to mysqli.

Still, I needed mysql to also handle these calls correctly.
The error is normally related to wrong function call sequences, though the bug report at shows otherwise.

For me, after commenting out hundreds of lines and several introspection calls to parse the procedure information (using information_schema and 'SHOW' extensions), I still got the same error.
The first result is returned, because I initiated my connection using the MYSQL_MULTI_RESULTS value of 131072 (forget this and you will never get any output, but an error message stating mysql cannot return results in this context)

After testing with this code (sproc2 simply calls 'SELECT * FROM sometable'), I found the error must be in the mysql library/extension. Somehow, mysql does not handle multiple resultsets correctly, or is at least missing some functionality related to handling multiple results.

$rs mysql_query('CALL sproc2(500)');
    while ((
$row=mysql_fetch_assoc($rs))!==false) {

$rs mysql_query('CALL sproc2(500)');
mysql_error(); //the notorious 'command out of synch' message :(
while (($row=mysql_fetch_assoc($rs))!==false) {

After spending hours debugging my code (the full library is already over the MB), the only solution seemed to be to CLOSE the connection after the first call, and reopening it before the second. 

So if you ever make a uniform database accessing interface and implement stored procedures/prepared statements (or classes for it), this could be a solution if you really wish to enable stored procedures.

Still, be aware that this is really a serious flaw in your design (and IMHO, the mysql extension)

Also see the documentation for mysqli on mysqli_query, which seems to be working fine.
2008-04-10 09:55:13
Dunno if is it a bug but when you are working with replications servers and work with multiple databases queries if you don't select the database it will only insert,update,delete into the master and bypass the slave, I think it its because it doesn't insert the sql on the binary log so the work around its to just call mysql_select_db 
MYSQL : 5.0.51a-log
PHP: 5.2.6
#Inserts only to master
$sql ="INSERT INTO (host) VALUES ('localhost');"

#The Working Way Master - Slave
$select_db mysql_select_db('mysql'$link2);
2008-06-16 18:28:03
It should be noted that mysql_query can generate an E_WARNING (not documented).  The warning that I hit was when the db user did not have permission to execute a UDF. 

Expected behavior would be like an Invalid SQL statement, where there is no E_WARNING generated by mysql_query.

Warning: mysql_query() [function.mysql-query]: Unable to save result set in filename.php

The mysql_errno is 1370 and the mysql_error is:

execute command denied to user 'username'@'%' for routine 'database_name.MyUDF'
2008-09-18 14:42:23
When you run a select statement and receive a response, the data types of your response will be a string regardless of the data type of the column.

// Query to select an int column
$query 'SELECT user_id FROM users WHERE user_id = 1';
$result mysql_query($query);
$array mysql_fetch_assoc($result);

// Echoes: string
echo gettype($array['user_id']);
2009-01-30 22:24:02
When processing a RENAME TABLE query, PHP apparently always returns false, no matter if the query was successfully processed or not.
2009-06-25 11:18:33
For those of you whom spent hours bashing your brains against the keyboard wondering why your non-English characters are output as question marks... Try the following:


mysql_connect('YOUR_DB_ADDRESS','YOUR_DB_USER','YOUR_DB_PASS') or die("Database error");

//SOLUTION::  add this comment before your 1st query -- force multiLanuage support
$result mysql_query("set names 'utf8'");

$query "select * from YOUR_DB_TABLE";
$result mysql_query($query);



Simply run the query "set names 'utf8' " against the MySQL DB and your output should appear correct.
2009-09-28 07:43:05
Use this to neatly insert data into a mysql table:

function mysql_insert($table$inserts) {
$values array_map('mysql_real_escape_string'array_values($inserts));
$keys array_keys($inserts);
mysql_query('INSERT INTO `'.$table.'` (`'.implode('`,`'$keys).'`) VALUES (\''.implode('\',\''$values).'\')');

For example:


('cars', array(
'make' => 'Aston Martin',
'model' => 'DB9',
'year' => '2009',
2010-12-20 11:12:17
I much prefer to use the same syntax for single INSERT, REPLACE and UPDATE queries as it is easier to read and keeps my code shorter (no seperate building of insert and update values)

INSERT INTO table SET x='1', y=3
UPDATE table SET x='2' WHERE y=3

So if your using a function to build your query, you will only ever need to code the "field=value, field2=value2" part for any query.
2012-04-03 17:16:47

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