Documentation

CDBMS
in package

Abstract class to connection and management of the generic database.

All implementations on specific DBMS (such as MySqlDB or PostgreSqlDB) must derive from this class.

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Table of Contents

ALERT  = 1
CRITICAL  = 2
DEBUG  = 7
EMERGENCY  = 0
ERROR  = 3
INFO  = 6
NOTICE  = 5
WARNING  = 4
$database_name  : string
$dbkey  : string|null
$dbname  : array<string|int, mixed>
$dbpassword  : string
$dbusername  : string
$handle  : array<string|int, mixed>
$hostname  : string
$last_id  : int
$port  : int
$results  : array<string|int, mixed>
$stmt  : mixed
$table  : string
__construct()  : mixed
Constructor
__destruct()  : mixed
Destroys any allocated resources
alert()  : void
Action must be taken immediately.
beginTransaction()  : void
Start DB transaction It is recommended to use transitions in case of multiple SQL statements, which, if at least one fails, the entire set of statements can be canceled
commit()  : void
Validate SQL operations performed after calling beginTransaction()
connect()  : void
Set a parameter for a DB connection
critical()  : void
Critical conditions.
debug()  : void
Detailed debug information.
decrypt()  : string
Decrypt a value from DB
deleteRecord()  : bool
Delete records from a DB table
disconnect()  : void
Releases the resource to connect to the DB
disconnectAll()  : void
Releases all the resources of the previously opened DBs
emergency()  : void
System is unusable.
encrypt()  : string
Reversibly encrypts a value to DB
error()  : void
Runtime errors that do not require immediate action but should typically be logged and monitored.
execute()  : void
Execution of SQL with binding
ExistsTable()  : bool
Check if the table passed as a parameter exists (including the prefix)
getAffectedRows()  : int
Returns how many rows were affected by the last operation performed
getAllTables()  : void
Returns an array containing the table name as an index and an array containing the name and type of the columns as a value
getArrayByName()  : array<string|int, mixed>|null
After executing a query it returns an array whose row index has the column value "$ name" and the rest of the fields are the cell value:
getArrayItemOfElements()  : array<string|int, mixed>
Given an array containing a series of records, it returns an array containing only the values ​​of a specific field
getColumnNames()  : array<string|int, string>|null
Returns an array containing the names of all columns for the last query executed
getCurrentDate()  : string
Return the current date for this DB
getCurrentDateTime()  : string
Return the current date time for this DB
getCurrentDBKey()  : string|null
Returns the key of the current DB
getDataTable()  : int|null
Given a previously executed query, it returns the result in a two-dimensional array
getDataValue()  : string|null
Returns a query value relative to a row and a column
getDBHandle()  : mixed
Returns the current handle of the DB
getDBResultAssoc()  : int
Returns the constant DB_ASSOC which establishes that the query must return an associative array
getDBResultBoth()  : int
Returns the constant DB_ASSOC which establishes that the query must return both an associative array and a numeric array
getDBResultNum()  : int
Returns the constant DB_ASSOC which establishes that the query must return a numeric array
getDBTable()  : string
Returns the name of the current main table
getFetchArray()  : array<string|int, mixed>|null
Reads a row of the position database $pos_row of the table of the previously executed query and returns it as an array with both numeric and associative numbers
getFetchAssoc()  : array<string|int, mixed>|null
Gets a row of the position database $pos_row of the table of the previously executed query and returns it as an associative array in an associative array whose index is given by the name of the column
getFetchRow()  : array<string|int, mixed>|null
Gets a row of the $pos_row position db of the previously executed query table and returns it as an array with a numeric index
getIdsArray()  : array<string|int, mixed>
Creates an array containing all elements found based on a DB table name or index
getInfoAllTables()  : array<string|int, mixed>
Returns an array containing the list of all the tables of the current DB
getLastDBErrorNumber()  : int
Reads the error number issued by the DB
getLastDBErrorString()  : string
Gets any error issued by the DB
getLastID()  : int|null
Returns the ID of the last inserted item
getNextID()  : int|null
Returns the from value of the next id to use in the insert NOTE: in Mysql you can set the primary key as autoincrement, than is not needed to set the table and it returns always null
getQueryDataTable()  : int|null
Given a previously executed query, it returns the result in a two-dimensional array
getQueryDataValue()  : string|null
Queries the DB and returns a specific value
getQueryFetchAssoc()  : array<string|int, mixed>|null
Queries the DB and returns an associative array containing the result
getQueryFetchRow()  : array<string|int, mixed>|null
Queries the DB and returns a row from the DB as an array having a numeric index
getTableColumnNames()  : array<string|int, string>
Returns an array containing the names of all columns of $tablename
getTotalColumns()  : int|bool
Returns the number of columns of a previously executed query
getTotalRows()  : int|bool
Reads the total of rows of a previously executed query
info()  : void
Interesting events.
insertRecord()  : bool
Make an entry in the DB
log()  : void
Logs with an arbitrary level.
notice()  : void
Normal but significant events.
prepare()  : void
Prepares an SQL statement for execution
query()  : bool
Query the DB with SQL
rollback()  : void
Cancel all SQL operations performed after calling beginTransaction ()
setAutoCommit()  : void
Set autocommit, as opposed to transitions, if true each operation is self-consistent and validated
setCurrentDBKey()  : bool
Set the current DB key NOTE: generally it is not necessary to use a DB key but it can be useful when there are multiple databases to manage
setDBTable()  : void
Sets the name of the reference table
updateRecord()  : bool
Make an update in the DB
warning()  : void
Exceptional occurrences that are not errors.
changeCurrentConnectionKey()  : void
Change the current db key (if you have more than on DB)
existsTableColumns()  : bool
Check if a named list of fields exists in a db table
getConnectionError()  : int
Set the current db key (if you have more than on DB)
getCurrentConnectionKey()  : string|null
Get the current db key
isConnected()  : bool
Check the connection is active without error
setDBColumns()  : void
Returns an array containing the list of columns of a table each columns contains: - 'field' the name of column, - 'type' the type of column, - 'null' if accept the NULL DB value,

Constants

Properties

$database_name

protected static string $database_name
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$dbkey

protected static string|null $dbkey = null
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$dbname

protected static array<string|int, mixed> $dbname = []
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$dbpassword

protected static string $dbpassword
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$dbusername

protected static string $dbusername
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$handle

protected static array<string|int, mixed> $handle = []
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$results

protected static array<string|int, mixed> $results = []
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Methods

__construct()

Constructor

public __construct([string $table = '' ]) : mixed
Parameters
$table : string = ''

name of the default db table (it can be emtpy)

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Return values
mixed —

__destruct()

Destroys any allocated resources

public __destruct() : mixed
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Return values
mixed —

alert()

Action must be taken immediately.

public static alert(string $message[, array<string|int, mixed> $context = [] ]) : void

Example: Entire website down, database unavailable, etc. This should trigger the SMS alerts and wake you up.

Parameters
$message : string
$context : array<string|int, mixed> = []
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Return values
void —

beginTransaction()

Start DB transaction It is recommended to use transitions in case of multiple SQL statements, which, if at least one fails, the entire set of statements can be canceled

public abstract beginTransaction() : void

NOTE: before use benginTransaction() you must be sure that the AutoCommit is false with setAutoCommit(false)

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see
setAutoCommit()
see
commit()
see
rollback()
Return values
void —

commit()

Validate SQL operations performed after calling beginTransaction()

public abstract commit() : void
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see
setAutoCommit()
see
beginTransaction()
see
rollback()
Return values
void —

connect()

Set a parameter for a DB connection

public static connect(string $dbname, string $username, string $password[, string $hostname = 'localhost' ][, int|string $port = DB_PORT ]) : void
Parameters
$dbname : string

name of the database inside the DBMS

$username : string

name of the user connecting to the DB

$password : string

DB password

$hostname : string = 'localhost'

name or IP address of the server (if it is on the same computer it is usually in "localhost")

$port : int|string = DB_PORT

communication port: if left empty, it takes the default value (3306)

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Return values
void —

critical()

Critical conditions.

public static critical(string $message[, array<string|int, mixed> $context = [] ]) : void

Example: Application component unavailable, unexpected exception.

Parameters
$message : string
$context : array<string|int, mixed> = []
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Return values
void —

debug()

Detailed debug information.

public static debug(string $message[, array<string|int, mixed> $context = [] ]) : void
Parameters
$message : string
$context : array<string|int, mixed> = []
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Return values
void —

decrypt()

Decrypt a value from DB

public abstract decrypt(string $val[, string $name = '' ]) : string

NOTE: if $val==$name decrypts the DB field name

Parameters
$val : string

value or name of the field to decrypt

$name : string = ''

name of the field that is returned

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Return values
string —

DB instruction to decrypt $ val

deleteRecord()

Delete records from a DB table

public abstract deleteRecord(string $table, string $conditions, array<string|int, string> $conditions_values, array<string|int, mixed> $types) : bool
Parameters
$table : string

name of the database table on which to delete one or more records

$conditions : string

conditions of the where with any "?" in the parameters

$conditions_values : array<string|int, string>

values ​​present in the WHERE condition that will have to replace the "?"

$types : array<string|int, mixed>
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Return values
bool —

result of the operation, true if successful

disconnect()

Releases the resource to connect to the DB

public abstract static disconnect([string|null $dbkey = null ]) : void
Parameters
$dbkey : string|null = null

key of db to disconnect (optional), if not send or is null keep the current db. Normally you have only one DB, in this case you can ignore $dbkey parameter

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Return values
void —

disconnectAll()

Releases all the resources of the previously opened DBs

public abstract static disconnectAll() : void
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Return values
void —

emergency()

System is unusable.

public static emergency(string $message[, array<string|int, mixed> $context = [] ]) : void
Parameters
$message : string
$context : array<string|int, mixed> = []
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Return values
void —

encrypt()

Reversibly encrypts a value to DB

public abstract encrypt(string $val[, string $name = '' ]) : string

NOTE: if $val==$name encrypts the name of the DB field

Parameters
$val : string

value or name of the field to be encrypted

$name : string = ''

name of the field that is returned

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Return values
string —

DB instruction to encrypt $val

error()

Runtime errors that do not require immediate action but should typically be logged and monitored.

public static error(string $message[, array<string|int, mixed> $context = [] ]) : void
Parameters
$message : string
$context : array<string|int, mixed> = []
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Return values
void —

execute()

Execution of SQL with binding

public abstract execute([array<string|int, mixed>|null $bind_param_values = null ][, array<string|int, string>|null $bind_param_types = null ]) : void
Parameters
$bind_param_values : array<string|int, mixed>|null = null
$bind_param_types : array<string|int, string>|null = null
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Return values
void —

ExistsTable()

Check if the table passed as a parameter exists (including the prefix)

public abstract ExistsTable(string $table) : bool
Parameters
$table : string

name of the table

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Return values
bool —

true if it exists, false if it does not exist

getAffectedRows()

Returns how many rows were affected by the last operation performed

public abstract getAffectedRows() : int
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Return values
int —

total of rows affected by the last operation

getAllTables()

Returns an array containing the table name as an index and an array containing the name and type of the columns as a value

public abstract getAllTables(array<string|int, string> &$db_tables) : void
Parameters
$db_tables : array<string|int, string>

list of tables to be returned

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Return values
void —

getArrayByName()

After executing a query it returns an array whose row index has the column value "$ name" and the rest of the fields are the cell value:

public getArrayByName([string|int $name = 'name' ][, string|null $fieldname_value = null ]) : array<string|int, mixed>|null
Parameters
$name : string|int = 'name'

name or position of the select column that must have as index (default is' 'name')

$fieldname_value : string|null = null

name of the field to fetch the value from, if null returns all data in an array

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example

if the sql returns: name val ========== Max 10 Min 1 The getArrayByName('name','val') function will return array('Max'=>10,'Min'=1)

example

if the sql returns: id name val ============ 1 Max 10 2 Min 1 The getArrayByName('name') function will return array('Max'=>array(ITEM_ID=>1,'val'=>10),'Min'=array(ITEM_ID=>2,'val'=>1))

Return values
array<string|int, mixed>|null —

array containing the list name => value in which value can be a scalar or an associative array if it must contain more values or it returns null if there are no elements or an empty array if the field name does not exist among the results of the last query executed

getArrayItemOfElements()

Given an array containing a series of records, it returns an array containing only the values ​​of a specific field

public getArrayItemOfElements(array<string|int, mixed> &$elements, string $fieldname) : array<string|int, mixed>
Parameters
$elements : array<string|int, mixed>

all records to be analyzed

$fieldname : string

name of the field / column containing the data to be extrapolated

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Return values
array<string|int, mixed> —

array containing the list of values ​​found or null if it found nothing

getColumnNames()

Returns an array containing the names of all columns for the last query executed

public abstract getColumnNames() : array<string|int, string>|null
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Return values
array<string|int, string>|null —

the associative having as index and value the column names of the queries or null if it fails or null if the table was not found

getCurrentDate()

Return the current date for this DB

public static getCurrentDate() : string
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Return values
string —

the current date for this DB

getCurrentDateTime()

Return the current date time for this DB

public static getCurrentDateTime() : string
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Return values
string —

the current date time for this DB

getCurrentDBKey()

Returns the key of the current DB

public getCurrentDBKey() : string|null
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Return values
string|null —

the key of the current DB

getDataTable()

Given a previously executed query, it returns the result in a two-dimensional array

public abstract getDataTable(array<string|int, mixed> &$data[, int|null $type = null ][, string|null $with_index = null ]) : int|null
Parameters
$data : array<string|int, mixed>

array containing the records found

$type : int|null = null

it can assume the values: DB_ASSOC, DB_NUM and DB_BOTH equivalent to the type of array it must return, respectively:

  • numeric index (returned from getDBResultNum())
  • associative index (returned from getDBResultAssoc())
  • both indices (returned from getDBResultBoth()) by default is value returned from getDBResultAssoc(), that is, it returns an associative array
$with_index : string|null = null

indexes of the output array (for example it could be "id"), if specified the numeric value of the row is replaced with the value indicated in the index

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Return values
int|null —

the total of records found or null if the query is not valid or return empty results

getDataValue()

Returns a query value relative to a row and a column

public abstract getDataValue([int|string $name_col = '0' ][, int|null $pos_row = null ]) : string|null
Parameters
$name_col : int|string = '0'

column name or numeric index (default 0)

$pos_row : int|null = null

position of the row starting from 0, if it is null or not indicated it reads the current value

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Return values
string|null —

value of the indicated row and column relative to the previously executed query, null if it does not exist

getDBHandle()

Returns the current handle of the DB

public static getDBHandle() : mixed
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Return values
mixed —

current DB handle or null if not available

getDBResultAssoc()

Returns the constant DB_ASSOC which establishes that the query must return an associative array

public abstract getDBResultAssoc() : int
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Return values
int —

getDBResultBoth()

Returns the constant DB_ASSOC which establishes that the query must return both an associative array and a numeric array

public abstract getDBResultBoth() : int
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Return values
int —

getDBResultNum()

Returns the constant DB_ASSOC which establishes that the query must return a numeric array

public abstract getDBResultNum() : int
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Return values
int —

getDBTable()

Returns the name of the current main table

public getDBTable() : string
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Return values
string —

name of the main reference table

getFetchArray()

Reads a row of the position database $pos_row of the table of the previously executed query and returns it as an array with both numeric and associative numbers

public abstract getFetchArray([int|null $pos_row = null ]) : array<string|int, mixed>|null
Parameters
$pos_row : int|null = null

position of the line to read, if omitted is the current element

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Return values
array<string|int, mixed>|null —

the array of the row indicated by $ pos_row (having both a numeric index and containing the column name) or null where the result is not valid (e.g. if the index is outside the range of the table)

getFetchAssoc()

Gets a row of the position database $pos_row of the table of the previously executed query and returns it as an associative array in an associative array whose index is given by the name of the column

public abstract getFetchAssoc([int|null $pos_row = null ]) : array<string|int, mixed>|null
Parameters
$pos_row : int|null = null

position of the line to read, the current element if it is omitted

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Return values
array<string|int, mixed>|null —

associative array of the row indicated by $pos_row or null in which the result is not valid e.g.: if the index is outside the range of the table

getFetchRow()

Gets a row of the $pos_row position db of the previously executed query table and returns it as an array with a numeric index

public abstract getFetchRow([int|null $pos_row = null ]) : array<string|int, mixed>|null
Parameters
$pos_row : int|null = null

posizione della riga da leggere, se omesso e' l'elemento corrente

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Return values
array<string|int, mixed>|null —

the array of the indicated row (having a numeric index) from $pos_row or null in which the result is not valid (e.g. if the index is outside the range of the table)

getIdsArray()

Creates an array containing all elements found based on a DB table name or index

public getIdsArray([int|string $item = 0 ][, int|string|null $idx = null ]) : array<string|int, mixed>
Parameters
$item : int|string = 0

index (int or string) of array to be returned

$idx : int|string|null = null

name or index of the field (by default it is 0, which is the first element)

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Return values
array<string|int, mixed> —

containing all values ​​indicated by $idx

getInfoAllTables()

Returns an array containing the list of all the tables of the current DB

public abstract getInfoAllTables([string|null $table = null ][, bool $with_sizes = false ]) : array<string|int, mixed>
Parameters
$table : string|null = null

base table name to get all those that use it

$with_sizes : bool = false

if "false" it does not calculate the total of the records (by default it is true)

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Return values
array<string|int, mixed> —

information relating to the tables in the DB

getLastDBErrorNumber()

Reads the error number issued by the DB

public abstract static getLastDBErrorNumber() : int
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Return values
int —

integer value containing the error issued by the DB

getLastDBErrorString()

Gets any error issued by the DB

public abstract static getLastDBErrorString() : string
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Return values
string —

containing the error issued by the DB

getLastID()

Returns the ID of the last inserted item

public getLastID() : int|null
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Return values
int|null —

if the operation was successful, it returns the id of the last element inserted

getNextID()

Returns the from value of the next id to use in the insert NOTE: in Mysql you can set the primary key as autoincrement, than is not needed to set the table and it returns always null

public abstract getNextID([string $table = '' ]) : int|null
Parameters
$table : string = ''

the name of counter associated to SEQUENCE

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Return values
int|null —

the next ID of the table

getQueryDataTable()

Given a previously executed query, it returns the result in a two-dimensional array

public getQueryDataTable(array<string|int, mixed> &$data, string $sql[, array<string|int, mixed> $bind_param_values = null ][, array<string|int, string> $bind_param_types = null ][, int|null $type = null ][, string|null $with_index = null ]) : int|null
Parameters
$data : array<string|int, mixed>

array containing the records found

$sql : string

string containing the query to execute

$bind_param_values : array<string|int, mixed> = null

deferred values ​​of the query

$bind_param_types : array<string|int, string> = null

DB data types

$type : int|null = null

it can assume the values: CDB::DB_ASSOC, CDB::DB_NUM and CDB::DB_BOTH equivalent to the type of array it must return, respectively:

  • numeric index (returned from getDBResultNum())
  • associative index (returned from getDBResultAssoc())
  • both indices (returned from getDBResultBoth()) by default is value returned from getDBResultAssoc(), that is, it returns an associative array
$with_index : string|null = null

indexes of the output array (for example it could be "id"), if specified the numeric value of the row is replaced with the value indicated in the index

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Return values
int|null —

the total of records found or null if the query is not valid or return empty results

getQueryDataValue()

Queries the DB and returns a specific value

public getQueryDataValue(string $sql[, string $name_col = '0' ][, int|null $pos_row = null ]) : string|null
Parameters
$sql : string

string containing the query to execute

$name_col : string = '0'

column name or numeric index (default 0)

$pos_row : int|null = null

position of the row starting from 0, if it is null or not indicated it reads the current value

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Return values
string|null —

indicated value of the row and column (by default it is the first column of current element)

getQueryFetchAssoc()

Queries the DB and returns an associative array containing the result

public getQueryFetchAssoc(string $sql[, int|null $pos_row = null ]) : array<string|int, mixed>|null
Parameters
$sql : string

string containing the query to execute

$pos_row : int|null = null

position of the row starting from 0, if it is null or not indicated it reads the current value

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Return values
array<string|int, mixed>|null —

the associative array of the row indicated by $ pos_row or null if the result is not valid (e.g. if the index is outside the range of the table)

getQueryFetchRow()

Queries the DB and returns a row from the DB as an array having a numeric index

public getQueryFetchRow(string $sql[, int|null $pos_row = null ]) : array<string|int, mixed>|null
Parameters
$sql : string

string containing the query to execute

$pos_row : int|null = null

position of the row starting from 0, if it is null or not indicated it reads the current value

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Return values
array<string|int, mixed>|null —

the array of the indicated row (having a numeric index) from $pos_row or null in which the result is not valid (e.g. if the index is outside the range of the table)

getTableColumnNames()

Returns an array containing the names of all columns of $tablename

public abstract getTableColumnNames(string $tablename) : array<string|int, string>
Parameters
$tablename : string

name of table

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Return values
array<string|int, string> —

an array with all fields or null if the table was not found

getTotalColumns()

Returns the number of columns of a previously executed query

public abstract getTotalColumns() : int|bool
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Return values
int|bool —

total of the columns that make up a table generated by the last query executed, FALSE in case of error

getTotalRows()

Reads the total of rows of a previously executed query

public abstract getTotalRows() : int|bool
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Return values
int|bool —

the total number of rows which make up a table generated by the last query executed or return false in case of error

info()

Interesting events.

public static info(string $message[, array<string|int, mixed> $context = [] ]) : void

Example: User logs in, SQL logs.

Parameters
$message : string
$context : array<string|int, mixed> = []
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Return values
void —

insertRecord()

Make an entry in the DB

public abstract insertRecord(string|null $table, array<string, mixed> $items, array<string|int, mixed> $types) : bool
Parameters
$table : string|null

string containing the insert to execute

$items : array<string, mixed>

associative array containing FIELD_NAME => FIELD_VALUE of the table

$types : array<string|int, mixed>
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Return values
bool —

true if the insertion has been made

log()

Logs with an arbitrary level.

public static log(mixed $level, string $message[, array<string|int, mixed> $context = [] ]) : void
Parameters
$level : mixed
$message : string
$context : array<string|int, mixed> = []
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Return values
void —

notice()

Normal but significant events.

public static notice(string $message[, array<string|int, mixed> $context = [] ]) : void
Parameters
$message : string
$context : array<string|int, mixed> = []
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Return values
void —

prepare()

Prepares an SQL statement for execution

public abstract prepare(string $sql) : void
Parameters
$sql : string

string containing the query to execute

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Return values
void —

query()

Query the DB with SQL

public abstract query(string $sql[, array<string|int, mixed>|null $bind_param_values = null ][, array<string|int, string>|null $bind_param_types = null ]) : bool
Parameters
$sql : string

string containing the query to execute

$bind_param_values : array<string|int, mixed>|null = null

deferred values ​​of the query

$bind_param_types : array<string|int, string>|null = null

DB data types

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Return values
bool —

true if the query was successful

rollback()

Cancel all SQL operations performed after calling beginTransaction ()

public abstract rollback() : void
Tags
see
setAutoCommit()
see
beginTransaction()
see
commit()
Return values
void —

setAutoCommit()

Set autocommit, as opposed to transitions, if true each operation is self-consistent and validated

public abstract setAutoCommit([bool $bool = true ]) : void
Parameters
$bool : bool = true

if is true the autocommit is running Note: if you use the transitions with you must be set to "false"

Tags
see
beginTransaction()
see
commit()
see
rollback()
Return values
void —

setCurrentDBKey()

Set the current DB key NOTE: generally it is not necessary to use a DB key but it can be useful when there are multiple databases to manage

public setCurrentDBKey(string $dbkey) : bool
Parameters
$dbkey : string

DB key value to set

Tags
Return values
bool —

true if the db key is valid

setDBTable()

Sets the name of the reference table

public setDBTable(string $table) : void
Parameters
$table : string

name of the main table to set

Tags
Return values
void —

updateRecord()

Make an update in the DB

public abstract updateRecord(string|null $table, string $conditions, array<string, string> $items, array<string|int, string> $conditions_values, array<string|int, mixed> $types) : bool
Parameters
$table : string|null

string containing the update to be performed

$conditions : string

string containing the conditions of the update whose values ​​are replaced by a "?"

$items : array<string, string>

associative array containing FIELD_NAME => FIELD_VALUE of the table

$conditions_values : array<string|int, string>

array containing the values ​​of the conditions declared in $conditions

$types : array<string|int, mixed>
Tags
Return values
bool —

true if the insertion has been made

warning()

Exceptional occurrences that are not errors.

public static warning(string $message[, array<string|int, mixed> $context = [] ]) : void

Example: Use of deprecated APIs, poor use of an API, undesirable things that are not necessarily wrong.

Parameters
$message : string
$context : array<string|int, mixed> = []
Tags
Return values
void —

changeCurrentConnectionKey()

Change the current db key (if you have more than on DB)

protected static changeCurrentConnectionKey(string|null $dbkey) : void
Parameters
$dbkey : string|null

the new dbkey for identify the DB connection if exists

Tags
throws
Exception

if $dbkey value is not a valid key

Return values
void —

existsTableColumns()

Check if a named list of fields exists in a db table

protected abstract existsTableColumns(string|null $table, array<string|int, mixed> $names) : bool
Parameters
$table : string|null

name of table

$names : array<string|int, mixed>

list of field to check

Tags
Return values
bool —

true if exists all fields

getConnectionError()

Set the current db key (if you have more than on DB)

protected static getConnectionError([string|null $dbkey = null ]) : int
Parameters
$dbkey : string|null = null

the new dbkey for identify the DB connection if exists

return int the id of error returned during the connection attempt

Tags
throws
Exception

if $dbkey value is not a valid key

Return values
int —

getCurrentConnectionKey()

Get the current db key

protected static getCurrentConnectionKey() : string|null
Tags
Return values
string|null —

key for identify the DB connection

isConnected()

Check the connection is active without error

protected static isConnected([string|null $dbkey = null ]) : bool
Parameters
$dbkey : string|null = null

valid key for identify the DB connection (if null or not declared the key is of current db) Is useful when you have more than one DB, in other case you don't need to use

Tags
Return values
bool —

true if is connected

setDBColumns()

Returns an array containing the list of columns of a table each columns contains: - 'field' the name of column, - 'type' the type of column, - 'null' if accept the NULL DB value,

protected abstract setDBColumns(array<string|int, mixed> &$db_cols[, string $table = null ]) : void
Parameters
$db_cols : array<string|int, mixed>

the results to be returned

$table : string = null

the table to be sampled, if not specified or null, uses the previously set table

Tags
Return values
void — 

        

        
    




    

    

                

    

        

            
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