SQLite3::prepare()

(PHP 5 >= 5.3.0, PHP 7)

Prepares an SQL statement for execution

说明

publicSQLite3::prepare(string $query): SQLite3Stmt

Prepares an SQL statement for execution and returns an SQLite3Stmt object.

参数

$query: The SQL query to prepare.

返回值

Returns an SQLite3Stmt object on success 或者在失败时返回FALSE.

范例

SQLite3::prepare() example

<?php
unlink('mysqlitedb.db');
$db = new SQLite3('mysqlitedb.db');
$db->exec('CREATE TABLE foo (id INTEGER, bar STRING)');
$db->exec("INSERT INTO foo (id, bar) VALUES (1, 'This is a test')");
$stmt = $db->prepare('SELECT bar FROM foo WHERE id=:id');
$stmt->bindValue(':id', 1, SQLITE3_INTEGER);
$result = $stmt->execute();
var_dump($result->fetchArray());
?>

参见

SQLite3Stmt::paramCount() Returns the number of parameters within the prepared statement
SQLite3Stmt::bindValue() Binds the value of a parameter to a statement variable
SQLite3Stmt::bindParam() Binds a parameter to a statement variable

Without checking the return value of "prepare" if "exec" is used then it will cause Fatal Error.
"PHP Fatal error: Call to a member function execute() on a non-object "
To avoid this error,need to check return value as following:
<?php
 $db = new SQLite3('school.db');
 if($stmt = $db->prepare('SELECT id,student_name FROM classTen '))
 {
     $result = $stmt->execute();
     $names=array();
     while($arr=$result->fetchArray(SQLITE3_ASSOC))
     {
     $names[$arr['id']]=$arr['student_name'];
     }
}
?>