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Package lib-db
Short Description PDO wrapper library with helpers
License LGPL-3.0+
Homepage http://openlss.org
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Informations about the package lib-db
openlss/lib-db
PDO wrapper library with helpers
The Db class tracks query counts and can debug queries. It will auto-generate SQL for insert/update queries.
Usage
Reference
Call to PDO
Any functions not shown in the reference are passed directly to PDO
Singleton Information
Db can be and is recommended to be used as a singleton to reuse the same PDO instance.
If multiple connections are needed use a custom method of maintaining the instances.
($this) Db::setConfig($config)
Sets the config of the database system.
Takes an array with the following structure
($this) Db::connect()
Will use the current configuration and connect
(int) Db::getQueryCount()
Returns the current query count
(bool) Db::close()
Close the open PDO istance (if any)
(array) Db::prepWhere($pairs,$type='WHERE')
Prepares WHERE strings to be used in queries
- $pairs array of clauses which can be in 4 formats
- 'field-name' => array($bool='AND',$operator='=',$value)
- 'field-name' => array($operator='=',$value) //bool defaults to AND
- 'field-name' => array($operator) //bool defaults to AND, value defaults to NULL
- 'field-name' => $value //bool defaults to AND, operator defaults to =
- NOTE: use Db::IS_NULL and Db::IS_NOT_NULL for null value operators
- $type specify the start of the string defaults to 'WHERE'
- returns an array, with members:
- [0]
the resulting WHERE clause; compiled for use with PDO::prepare including leading space (ready-to-use) - [n]
the values array; ready for use with PDO::execute
- [0]
(int) Db::insert($table,$params=array(),$update_if_exists=false)
Insert into a table with given parameters
When $update_if_exists is set to TRUE it will perform an INSERT OR UPDATE query.
(bool) Db::update($table,$keys=array(),$params=array())
Updates a record in the database
- $table The table to be updates
- $keys Pairs compatible with prepWhere
- $params Array of name=>value pairs to update with
(result) Db::fetch($stmt,$params=array(),$throw_exception=Db::NO_EXCEPTIONS,$except_code=null,$flatten=Db::NO_FLATTEN)
Fetches a single row from a query and returns the result
- $stmt The SQL query
- $params Parameters to be bound to the query
- $throw_exception When set to Db::EXCEPTIONS will throw an exception on result not found
- $except_cde Code to be throw with the exception
- $flatten When set to Db::FLATTEN will return an array of values from a specific column
(array result) Db::fetchAll($stmt,$params=array(),$throw_exception=Db::NO_EXCEPTIONS,$except_code=null,$flatten=Db::NO_FLATTEN)
Same as fetch but returns all results in an array
