sqlite_exec
SQLiteDatabase::exec
(PHP 5 < 5.4.0, PECL sqlite >= 1.0.3)
sqlite_exec -- SQLiteDatabase::exec — Executes a result-less query against a given database
说明
$dbhandle
, string $query
[, string &$error_msg
] )$query
, resource $dbhandle
)面向对象风格 (method):
$query
[, string &$error_msg
] )
Executes an SQL statement given by the query against
a given database handle (specified by the dbhandle
parameter).
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.
参数
-
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.
-
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.
Note: 为兼容其他数据库扩展(比如 MySQL)，支持两种可替代的语法。推荐第一种格式，函数的第一个参数是
dbhandle。
返回值
This function will return a boolean result; TRUE for success or FALSE for failure.
If you need to run a query that returns rows, see sqlite_query() .
由
SQLITE_ASSOC 与 SQLITE_BOTH
返回的列名会依照 sqlite.assoc_case
配置选项的值决定大小写。
更新日志
| 版本 | 说明 |
|---|---|
| 5.1.0 |
Added the error_msg parameter
|
范例
Example #1 Procedural example
<?php
$dbhandle = sqlite_open ( 'mysqlitedb' );
$query = sqlite_exec ( $dbhandle , "UPDATE users SET email='jDoe@example.com' WHERE username='jDoe'" , $error );
if (! $query ) {
exit( "Error in query: ' $error '" );
} else {
echo 'Number of rows modified: ' , sqlite_changes ( $dbhandle );
}
?>
Example #2 Object-oriented example
<?php
$dbhandle = new SQLiteDatabase ( 'mysqlitedb' );
$query = $dbhandle -> queryExec ( "UPDATE users SET email='jDoe@example.com' WHERE username='jDoe'" , $error );
if (! $query ) {
exit( "Error in query: ' $error '" );
} else {
echo 'Number of rows modified: ' , $dbhandle -> changes ();
}
?> 参见
- sqlite_query() - Executes a query against a given database and returns a result handle
- 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
用户评论:
[#1] nonproffessional at clockworkgeek dot com [2008-04-17 12:01:55]
Just to point out that "CREATE TABLE IF NOT EXISTS" is only supported in SQLite version 3.3.0 or above. And PHP (currently 5.2.5) only comes with SQLite version 2.1.
Executing a create table like this will throw an error as will creating a table that already exists. Instead execute a normal "CREATE TABLE" command and catch it with "try {..} catch".
[#2] rrf5000 at psu dot edu [2007-06-24 04:33:37]
If you run a multiline SQL command (an INSERT, for example), and there is a SQL error in any of the lines, this function will recognize the error and return FALSE. However, any correct commands before the one with the error will still execute. Additionally, if you run changes() after such an incident, it will report that 0 rows have been changed, even though there were rows added to the table by the successful commands.
An example would be:
<?php
// create new database (OO interface)
$dbo = new SQLiteDatabase("db/database.sqlite");
// create table foo
$dbo->query("CREATE TABLE foo(id INTEGER PRIMARY KEY, name CHAR(255));");
// insert sample data
$ins_query = "INSERT INTO foo (name) VALUES ('Ilia1');
INSERT INTO foo (name) VALUES('Ilia2');
INSECT INTO foo (name) VALUES('Ilia3');";
$dbo->queryExec($ins_query);
// get number of rows changed
$changes = $dbo->changes();
echo "<br />Rows changed: $changes<br />";
// Get and show inputted data
$tableArray = $dbo->arrayQuery("SELECT * FROM foo;");
echo "Table Contents\n";
echo "<pre>\n";
print_r($tableArray);
echo "\n</pre>";
?>
The above code should show that 0 rows have been changed, but that there is new data in the table.