Php/docs/sqlite3.querysingle
SQLite3::querySingle
(PHP 5 >= 5.3.0, PHP 7)
SQLite3::querySingle — Executes a query and returns a single result
说明
public SQLite3::querySingle
( string $query
[, bool $entire_row
= false
] ) : mixed
Executes a query and returns a single result.
参数
query
- The SQL query to execute.
entire_row
- By default, querySingle() returns the value of the first column returned by the query. If
entire_row
istrue
, then it returns an array of the entire first row.
返回值
Returns the value of the first column of results or an array of the entire
first row (if entire_row
is true
).
If the query is valid but no results are returned, then null
will be
returned if entire_row
is false
, otherwise an
empty array is returned.
Invalid or failing queries will return false
.
范例
Example #1 SQLite3::querySingle() example
<?php$db = new SQLite3('mysqlitedb.db');var_dump($db->querySingle('SELECT username FROM user WHERE userid=1'));print_r($db->querySingle('SELECT username, email FROM user WHERE userid=1', true));?>
以上例程的输出类似于:
string(5) "Scott" Array ( [username] => Scott [email] => scott@example.com )