Class CallbackStatement
Wraps a statement in a callback that allows row results to be modified when being fetched.
This is used by CakePHP to eagerly load association data.
Constants
-
string
FETCH_TYPE_ASSOC ¶'assoc'
Used to designate that an associated array be returned in a result when calling fetch methods
-
string
FETCH_TYPE_NUM ¶'num'
Used to designate that numeric indexes be returned in a result when calling fetch methods
-
string
FETCH_TYPE_OBJ ¶'obj'
Used to designate that a stdClass object be returned in a result when calling fetch methods
Property Summary
-
$_callback protected
callable
A callback function to be applied to results.
-
$_driver protected
Cake\Database\Driver|null
Reference to the driver object associated to this statement.
-
$_hasExecuted protected
bool
Whether or not this statement has already been executed
-
$_statement protected
Cake\Database\StatementInterface|PDOStatement|null
Statement instance implementation, such as PDOStatement or any other custom implementation.
-
$queryString public @property-read
string
Method Summary
-
__construct() public
Constructor
-
__get() public
Magic getter to return $queryString as read-only.
-
bind() public
Binds a set of values to statement object with corresponding type.
-
bindValue() public
Assign a value to a positional or named variable in prepared query. If using positional variables you need to start with index one, if using named params then just use the name in any order.
-
cast() public
Converts a give value to a suitable database value based on type and return relevant internal statement type
-
closeCursor() public
Closes a cursor in the database, freeing up any resources and memory allocated to it. In most cases you don't need to call this method, as it is automatically called after fetching all results from the result set.
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columnCount() public
Returns the number of columns this statement's results will contain.
-
count() public
Statements can be passed as argument for count() to return the number for affected rows from last execution.
-
errorCode() public
Returns the error code for the last error that occurred when executing this statement.
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errorInfo() public
Returns the error information for the last error that occurred when executing this statement.
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execute() public
Executes the statement by sending the SQL query to the database. It can optionally take an array or arguments to be bound to the query variables. Please note that binding parameters from this method will not perform any custom type conversion as it would normally happen when calling
bindValue
. -
fetch() public
Fetch a row from the statement.
-
fetchAll() public
Fetch all rows from the statement.
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fetchAssoc() public
Returns the next row in a result set as an associative array. Calling this function is the same as calling $statement->fetch(StatementDecorator::FETCH_TYPE_ASSOC). If no results are found false is returned.
-
fetchColumn() public
Returns the value of the result at position.
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getInnerStatement() public
Returns the statement object that was decorated by this class.
-
getIterator() public
Statements are iterable as arrays, this method will return the iterator object for traversing all items in the result.
-
lastInsertId() public
Returns the latest primary inserted using this statement.
-
matchTypes() public
Matches columns to corresponding types
-
rowCount() public
Returns the number of rows affected by this SQL statement.
Method Detail
__construct() ¶ public
__construct(Cake\Database\StatementInterface $statement, Cake\Database\Driver $driver, callable $callback)
Constructor
Parameters
-
Cake\Database\StatementInterface
$statement The statement to decorate.
-
Cake\Database\Driver
$driver The driver instance used by the statement.
-
callable
$callback The callback to apply to results before they are returned.
__get() ¶ public
__get(string $property): mixed
Magic getter to return $queryString as read-only.
Parameters
-
string
$property internal property to get
Returns
mixed
bind() ¶ public
bind(array $params, array $types): void
Binds a set of values to statement object with corresponding type.
Parameters
-
array
$params list of values to be bound
-
array
$types list of types to be used, keys should match those in $params
Returns
void
bindValue() ¶ public
bindValue(string|int $column, mixed $value, string $type = 'string'): void
Assign a value to a positional or named variable in prepared query. If using positional variables you need to start with index one, if using named params then just use the name in any order.
It is not allowed to combine positional and named variables in the same statement.
Examples:
$statement->bindValue(1, 'a title');
$statement->bindValue('active', true, 'boolean');
$statement->bindValue(5, new \DateTime(), 'date');
Parameters
-
string|int
$column name or param position to be bound
-
mixed
$value The value to bind to variable in query
-
string
$type optional name of configured Type class
Returns
void
cast() ¶ public
cast(mixed $value, Cake\Database\Type|string $type): array
Converts a give value to a suitable database value based on type and return relevant internal statement type
Parameters
-
mixed
$value The value to cast
-
Cake\Database\Type|string
$type The type name or type instance to use.
Returns
array
closeCursor() ¶ public
closeCursor(): void
Closes a cursor in the database, freeing up any resources and memory allocated to it. In most cases you don't need to call this method, as it is automatically called after fetching all results from the result set.
Returns
void
columnCount() ¶ public
columnCount(): int
Returns the number of columns this statement's results will contain.
Example:
$statement = $connection->prepare('SELECT id, title from articles');
$statement->execute();
echo $statement->columnCount(); // outputs 2
Returns
int
count() ¶ public
count(): int
Statements can be passed as argument for count() to return the number for affected rows from last execution.
Returns
int
errorCode() ¶ public
errorCode(): int|string
Returns the error code for the last error that occurred when executing this statement.
Returns
int|string
errorInfo() ¶ public
errorInfo(): array
Returns the error information for the last error that occurred when executing this statement.
Returns
array
execute() ¶ public
execute(array|null $params = null): bool
Executes the statement by sending the SQL query to the database. It can optionally
take an array or arguments to be bound to the query variables. Please note
that binding parameters from this method will not perform any custom type conversion
as it would normally happen when calling bindValue
.
Parameters
-
array|null
$params optional list of values to be bound to query
Returns
bool
fetch() ¶ public
fetch(string $type = parent::FETCH_TYPE_NUM): array|false
Fetch a row from the statement.
The result will be processed by the callback when it is not false
.
Parameters
-
string
$type optional Either 'num' or 'assoc' to indicate the result format you would like.
Returns
array|false
fetchAll() ¶ public
fetchAll(string $type = parent::FETCH_TYPE_NUM): array
Fetch all rows from the statement.
Each row in the result will be processed by the callback when it is not `false.
Parameters
-
string
$type optional Either 'num' or 'assoc' to indicate the result format you would like.
Returns
array
fetchAssoc() ¶ public
fetchAssoc(): array|false
Returns the next row in a result set as an associative array. Calling this function is the same as calling $statement->fetch(StatementDecorator::FETCH_TYPE_ASSOC). If no results are found false is returned.
Returns
array|false
fetchColumn() ¶ public
fetchColumn(int $position): mixed|false
Returns the value of the result at position.
Parameters
-
int
$position The numeric position of the column to retrieve in the result
Returns
mixed|false
getInnerStatement() ¶ public
getInnerStatement(): Cake\Database\StatementInterface|PDOStatement
Returns the statement object that was decorated by this class.
Returns
Cake\Database\StatementInterface|PDOStatement
getIterator() ¶ public
getIterator(): Cake\Database\StatementInterface|PDOStatement
Statements are iterable as arrays, this method will return the iterator object for traversing all items in the result.
Example:
$statement = $connection->prepare('SELECT id, title from articles');
foreach ($statement as $row) {
//do stuff
}
Returns
Cake\Database\StatementInterface|PDOStatement
lastInsertId() ¶ public
lastInsertId(string|null $table = null, string|null $column = null): string|int
Returns the latest primary inserted using this statement.
Parameters
-
string|null
$table optional table name or sequence to get last insert value from
-
string|null
$column optional the name of the column representing the primary key
Returns
string|int
matchTypes() ¶ public
matchTypes(array $columns, array $types): array
Matches columns to corresponding types
Both $columns and $types should either be numeric based or string key based at the same time.
Parameters
-
array
$columns list or associative array of columns and parameters to be bound with types
-
array
$types list or associative array of types
Returns
array
rowCount() ¶ public
rowCount(): int
Returns the number of rows affected by this SQL statement.
Example:
$statement = $connection->prepare('SELECT id, title from articles');
$statement->execute();
print_r($statement->rowCount()); // will show 1
Returns
int
Property Detail
$_driver ¶ protected
Reference to the driver object associated to this statement.
Type
Cake\Database\Driver|null
$_statement ¶ protected
Statement instance implementation, such as PDOStatement or any other custom implementation.
Type
Cake\Database\StatementInterface|PDOStatement|null