Doctrine\DBAL\Driver\Statement::bindParam
Binds a PHP variable to a corresponding named or question mark placeholder in the SQL statement that was use to prepare the statement. Unlike PDOStatement->bindValue(), the variable is bound as a reference and will only be evaluated at the time that PDOStatement->execute() is called.
Most parameters are input parameters, that is, parameters that are used in a read-only fashion to build up the query. Some drivers support the invocation of stored procedures that return data as output parameters, and some also as input/output parameters that both send in data and are updated to receive it.
Signature
public function bindParam(mixed
$column,
[mixed&
$variable = null,
[integer
$type = null,
[integer
$length = null]]] )
Parameters
$column
— mixed- Parameter identifier. For a prepared statement using named placeholders,
this will be a parameter name of the form :name. For a prepared statement
using question mark placeholders, this will be the 1-indexed position of the parameter $variable
— mixed- Name of the PHP variable to bind to the SQL statement parameter.
$type
— integer- Explicit data type for the parameter using the PDO::PARAM_* constants. To return
an INOUT parameter from a stored procedure, use the bitwise OR operator to set the
PDO::PARAM_INPUT_OUTPUT bits for the data_type parameter. $length
— integer- You must specify maxlength when using an OUT bind so that PHP allocates enough memory to hold the returned value.
Returns
- boolean
- Returns TRUE on success or FALSE on failure.