sqlite_array_query
SQLiteDatabase::arrayQuery
(PHP 5 < 5.4.0, PECL sqlite >= 1.0.0)
sqlite_array_query -- SQLiteDatabase::arrayQuery — Execute a query against a given database and returns an array
说明
$dbhandle
, string $query
[, int $result_type = SQLITE_BOTH
[, bool $decode_binary = true
]] )$query
, resource $dbhandle
[, int $result_type = SQLITE_BOTH
[, bool $decode_binary = true
]] )面向对象风格 (method):
$query
[, int $result_type = SQLITE_BOTH
[, bool $decode_binary = true
]] )sqlite_array_query() executes the given query and returns an array of the entire result set. It is similar to calling sqlite_query() and then sqlite_fetch_array() for each row in the result set. sqlite_array_query() is significantly faster than the aforementioned.
sqlite_array_query() is best suited to queries returning 45 rows or less. If you have more data than that, it is recommended that you write your scripts to use sqlite_unbuffered_query() instead for more optimal performance.
参数
-
query -
The query to be executed.
Data inside the query should be properly escaped.
-
dbhandle -
The SQLite Database resource; returned from sqlite_open() when used procedurally. This parameter is not required when using the object-oriented method.
-
result_type -
可选的
result_type参数接受常量，且决定返回的数组如何被索引。使用SQLITE_ASSOC会仅返回关联索引（已命名字段），而SQLITE_NUM会仅返回数值索引。SQLITE_BOTH会同时返回关联和数值索引。SQLITE_BOTH是此函数的默认值。 -
decode_binary -
当
decode_binary参数设置为TRUE（默认值）时，PHP 会解码那些由 sqlite_escape_string() 编码后的二进制数据。通常应保留此值为其默认值，除非要与其他使用 SQLlite 的应用程序建立的数据交互。
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
Returns an array of the entire result set; FALSE otherwise.
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。
范例
Example #1 过程化风格
<?php
$dbhandle = sqlite_open ( 'sqlitedb' );
$result = sqlite_array_query ( $dbhandle , 'SELECT name, email FROM users LIMIT 25' , SQLITE_ASSOC );
foreach ( $result as $entry ) {
echo 'Name: ' . $entry [ 'name' ] . ' E-mail: ' . $entry [ 'email' ];
}
?>
Example #2 Object-oriented style
<?php
$dbhandle = new SQLiteDatabase ( 'sqlitedb' );
$result = $dbhandle -> arrayQuery ( 'SELECT name, email FROM users LIMIT 25' , SQLITE_ASSOC );
foreach ( $result as $entry ) {
echo 'Name: ' . $entry [ 'name' ] . ' E-mail: ' . $entry [ 'email' ];
}
?> 参见
- sqlite_query() - Executes a query against a given database and returns a result handle
- sqlite_fetch_array() - Fetches the next row from a result set as an array
- sqlite_fetch_string() - 别名 sqlite_fetch_single
用户评论:
[#1] kendlj at NOSPAM dot web dot de [2005-04-18 04:21:59]
Do not use this code, whenever you may get no result:
<?php
$return_data=@sqlite_array_query($query,$databaseHandle);
if(!$return_data)
{
//Errorhandling code
die( sqlite_error_string( sqlite_last_error($this->databaseHandle) ) );
}
?>
It will execute the Errorhandling code although there is no error, cause if there is nothing found, sqlite_array_query returns an empty array, which is interpreted as 'false' here.
You will get an Message like:
'not an error'
Instead use:
<?php
$return_data=@sqlite_array_query($query,$databaseHandle);
if($return_data===false)
{
//Errorhandling code
}
?>