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# mysqli_query

(PHP 5)

mysqli_query

(no version information, might be only in CVS)

mysqli->query() -- Performs a query on the database

## Descrição

Procedural style:

mixed mysqli_query ( mysqli link, string query [, int resultmode] )

Object oriented style (method):

class mysqli {
mixed query ( string query [, int resultmode] )
}

Performs a `query` against the database.

Functionally, using this function is identical to calling mysqli_real_query() followed either by mysqli_use_result() or mysqli_store_result().

## Parâmetros

`link`

  Apenas para estilo de procedimento: Um identificador de conexão retornado por mysqli_connect() or mysqli_init()

`query`

  The query string.

`resultmode`

  Either the constant `MYSQLI_USE_RESULT` or `MYSQLI_STORE_RESULT` depending on the desired behavior. By default, `MYSQLI_STORE_RESULT` is used.

  If you use `MYSQLI_USE_RESULT` all subsequent calls will return error `Commands out of sync` unless you call mysqli_free_result()

## Valores de retornado

Retorna `TRUE` em caso de sucesso ou `FALSE` em falhas. For `SELECT, SHOW, DESCRIBE` or `EXPLAIN` mysqli_query() will return a result object.

## Exemplos

Exemplo 1. Object oriented style
`<?php $mysqli = new mysqli("localhost", "my_user", "my_password", "world"); /* check connection */ if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit(); } /* Create table doesn't return a resultset */ if ($mysqli->query("CREATE TEMPORARY TABLE myCity LIKE City") === TRUE) { printf("Table myCity successfully created.\n"); } /* Select queries return a resultset */ if ($result = $mysqli->query("SELECT Name FROM City LIMIT 10")) { printf("Select returned %d rows.\n", $result->num_rows); /* free result set */ $result->close(); } /* If we have to retrieve large amount of data we use MYSQLI_USE_RESULT */ if ($result = $mysqli->query("SELECT * FROM City", MYSQLI_USE_RESULT)) { /* Note, that we can't execute any functions which interact with the server until result set was closed. All calls will return an 'out of sync' error */ if (!$mysqli->query("SET @a:='this will not work'")) { printf("Error: %s\n", $mysqli->error); } $result->close(); } $mysqli->close(); ?>`

Exemplo 2. Procedural style
`<?php $link = mysqli_connect("localhost", "my_user", "my_password", "world"); /* check connection */ if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit(); } /* Create table doesn't return a resultset */ if (mysqli_query($link, "CREATE TEMPORARY TABLE myCity LIKE City") === TRUE) { printf("Table myCity successfully created.\n"); } /* Select queries return a resultset */ if ($result = mysqli_query($link, "SELECT Name FROM City LIMIT 10")) { printf("Select returned %d rows.\n", mysqli_num_rows($result)); /* free result set */ mysqli_free_result($result); } /* If we have to retrieve large amount of data we use MYSQLI_USE_RESULT */ if ($result = mysqli_query($link, "SELECT * FROM City", MYSQLI_USE_RESULT)) { /* Note, that we can't execute any functions which interact with the server until result set was closed. All calls will return an 'out of sync' error */ if (!mysqli_query($link, "SET @a:='this will not work'")) { printf("Error: %s\n", mysqli_error($link)); } mysqli_free_result($result); } mysqli_close($link); ?>`

O exemplo acima irá imprimir:

    Table myCity successfully created.
    Select returned 10 rows.
    Error: Commands out of sync;  You can't run this command now

## Veja também

mysqli_real_query()
mysqli_multi_query()
mysqli_free_result()

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