sqlite_query
SQLiteDatabase::query
(PHP 5 < 5.4.0, PECL sqlite >= 1.0.0)
sqlite_query -- SQLiteDatabase::query — Executes a query against a given database and returns a result handle
Опис
$dbhandle
, string $query
[, int $result_type = SQLITE_BOTH
[, string &$error_msg
]] )$query
, resource $dbhandle
[, int $result_type = SQLITE_BOTH
[, string &$error_msg
]] )Об'єктно-орієнтований стиль (method):
$query
[, int $result_type = SQLITE_BOTH
[, string &$error_msg
]] )
Executes an SQL statement given by the query against
a given database handle.
Параметри
-
dbhandle -
The SQLite Database resource; returned from sqlite_open() when used procedurally. This parameter is not required when using the object-oriented method.
-
query -
The query to be executed.
Data inside the query should be properly escaped.
-
result_type -
The optional
result_typeparameter accepts a constant and determines how the returned array will be indexed. UsingSQLITE_ASSOCwill return only associative indices (named fields) whileSQLITE_NUMwill return only numerical indices (ordinal field numbers).SQLITE_BOTHwill return both associative and numerical indices.SQLITE_BOTHis the default for this function. -
error_msg -
The specified variable will be filled if an error occurs. This is specially important because SQL syntax errors can't be fetched using the sqlite_last_error() function.
Зауваження: Two alternative syntaxes are supported for compatibility with other database extensions (such as MySQL). The preferred form is the first, where the
dbhandleparameter is the first parameter to the function.
Значення, що повертаються
This function will return a result handle або FALSE в разі помилки.
For queries that return rows, the result handle can then be used with
functions such as sqlite_fetch_array() and
sqlite_seek().
Regardless of the query type, this function will return FALSE if the
query failed.
sqlite_query() returns a buffered, seekable result handle. This is useful for reasonably small queries where you need to be able to randomly access the rows. Buffered result handles will allocate memory to hold the entire result and will not return until it has been fetched. If you only need sequential access to the data, it is recommended that you use the much higher performance sqlite_unbuffered_query() instead.
Журнал Змін
| Версія | Опис |
|---|---|
| 5.1.0 |
Added the error_msg parameter
|
Примітки
SQLite will execute multiple queries separated by semicolons, so you can use it to execute a batch of SQL that you have loaded from a file or have embedded in a script. However, this works only when the result of the function is not used - if it is used, only the first SQL statement would be executed. Function sqlite_exec() will always execute multiple SQL statements.
When executing multiple queries, the return value of this function
will be FALSE if there was an error, but undefined otherwise (it might
be TRUE for success or it might return a result handle).
Прогляньте Також
- sqlite_unbuffered_query() - Execute a query that does not prefetch and buffer all data
- sqlite_array_query() - Execute a query against a given database and returns an array
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