egroupware_official/etemplate/inc/class.so_sql.inc.php

898 lines
27 KiB
PHP

<?php
/**
* eGroupWare generalized SQL Storage Object
*
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package etemplate
* @link http://www.egroupware.org
* @author Ralf Becker <RalfBecker@outdoor-training.de>
* @version $Id$
*/
/**
* generalized SQL Storage Object
*
* the class can be used in following ways:
* 1) by calling the constructor with an app and table-name or
* 2) by setting the following documented class-vars in a class derifed from this one
* Of cause can you derife the class and call the constructor with params.
*
* @package etemplate
* @subpackage api
* @author RalfBecker-AT-outdoor-training.de
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
*/
class so_sql
{
/**
* need to be set in the derived class to the db-table-name
*
* @var string
*/
var $table_name;
/**
* db-col-name of autoincrement id or ''
*
* @var string
*/
var $autoinc_id = '';
/**
* all cols in data which are not (direct)in the db, for data_merge
*
* @var array
*/
var $non_db_cols = array();
/**
* 4 turns on the so_sql debug-messages, default 0
*
* @var int
*/
var $debug = 0;
/**
* string to be written to db if a col-value is '', eg. "''" or 'NULL' (default)
*
* @var string
*/
var $empty_on_write = 'NULL';
/**
* total number of entries of last search with start != false
*
* @var int/boolean
*/
var $total = false;
/**
* privat instance of the db-object
*
* @var egw_db
*/
var $db;
/**
* unique keys/index, set by derived class or via so_sql($app,$table)
*
* @var array
*/
var $db_uni_cols = array();
/**
* db-col-name / internal-name pairs, set by derived calls or via so_sql($app,$table)
*
* @var array
*/
var $db_key_cols = array();
/**
* db-col-name / internal-name pairs, set by derived calls or via so_sql($app,$table)
*
* @var array
*/
var $db_data_cols = array();
/**
* @var array $db_cols all columns = $db_key_cols + $db_data_cols, set in the constructor
*/
var $db_cols = array();
/**
* eGW table definition
*
* @var array
*/
var $table_def = array();
/**
* holds the content of all columns
*
* @var array
*/
var $data = array();
/**
* @deprecated a SO class dont need to and should NOT export functions (make them callable via menuaction)
* @var array
*/
var $public_functions = array();
/**
* constructor of the class
*
* NEED to be called from the constructor of the derived class !!!
*
* @param string $app should be set if table-defs to be read from <app>/setup/tables_current.inc.php
* @param string $table should be set if table-defs to be read from <app>/setup/tables_current.inc.php
* @param object/db $db database object, if not the one in $GLOBALS['egw']->db should be used, eg. for an other database
* @param string $colum_prefix='' column prefix to automatic remove from the column-name, if the column name starts with it
*
* @return so_sql
*/
function so_sql($app='',$table='',$db=null,$column_prefix='')
{
$this->db = is_object($db) ? clone($db) : clone($GLOBALS['egw']->db);
$this->db_cols = $this->db_key_cols + $this->db_data_cols;
if ($app)
{
$this->db->set_app($app);
if ($table) $this->setup_table($app,$table,$column_prefix);
}
$this->init();
if ((int) $this->debug >= 4)
{
echo "<p>so_sql('$app','$table')</p>\n";
_debug_array($this);
}
}
/**
* sets up the class for an app and table (by using the table-definition of $app/setup/tables_current.inc.php
*
* If you need a more complex conversation then just removing the column_prefix, you have to do so in a derifed class !!!
*
* @param string $app app-name $table belongs too
* @param string $table table-name
* @param string $colum_prefix='' column prefix to automatic remove from the column-name, if the column name starts with it
*/
function setup_table($app,$table,$colum_prefix='')
{
$this->table_name = $table;
$this->table_def = $this->db->get_table_definitions($app,$table);
if (!$this->table_def || !is_array($this->table_def['fd']))
{
echo "<p>so_sql::setup_table('$app','$table'): No table definitions found !!!<br>\n".function_backtrace()."</p>\n";
}
$this->db_key_cols = $this->db_data_cols = $this->db_cols = array();
$this->autoinc_id = '';
$len_prefix = strlen($colum_prefix);
foreach($this->table_def['fd'] as $col => $def)
{
$name = $col;
if ($len_prefix && substr($name,0,$len_prefix) == $colum_prefix)
{
$name = substr($col,$len_prefix);
}
if (in_array($col,$this->table_def['pk']))
{
$this->db_key_cols[$col] = $name;
}
else
{
$this->db_data_cols[$col] = $name;
}
$this->db_cols[$col] = $name;
if ($def['type'] == 'auto')
{
$this->autoinc_id = $col;
}
if (in_array($name,$this->table_def['uc']))
{
$this->db_uni_cols[$col] = $name;
}
}
}
/**
* merges in new values from the given new data-array
*
* @param $new array in form col => new_value with values to set
*/
function data_merge($new)
{
if ((int) $this->debug >= 4) echo "<p>so_sql::data_merge(".print_r($new,true).")</p>\n";
if (!is_array($new) || !count($new))
{
return;
}
foreach($this->db_cols as $db_col => $col)
{
if (isset($new[$col]))
{
$this->data[$col] = $new[$col];
}
}
foreach($this->non_db_cols as $db_col => $col)
{
if (isset($new[$col]))
{
$this->data[$col] = $new[$col];
}
}
if ((int) $this->debug >= 4) _debug_array($this->data);
}
/**
* changes the data from the db-format to your work-format
*
* it gets called everytime when data is read from the db
* This function needs to be reimplemented in the derived class
*
* @param array $data if given works on that array and returns result, else works on internal data-array
*/
function db2data($data=null)
{
if (!is_array($data))
{
$data = &$this->data;
}
// do the necessare changes here
return $data;
}
/**
* changes the data from your work-format to the db-format
*
* It gets called everytime when data gets writen into db or on keys for db-searches
* this needs to be reimplemented in the derived class
*
* @param array $data if given works on that array and returns result, else works on internal data-array
*/
function data2db($data=null)
{
if ($intern = !is_array($data))
{
$data = &$this->data;
}
// do the necessary changes here
return $data;
}
/**
* initializes data with the content of key
*
* @param array $keys array with keys in form internalName => value
*/
function init($keys=array())
{
$this->data = array();
$this->db2data();
$this->data_merge($keys);
}
/**
* reads row matched by key and puts all cols in the data array
*
* @param array $keys array with keys in form internalName => value, may be a scalar value if only one key
* @param string/array $extra_cols string or array of strings to be added to the SELECT, eg. "count(*) as num"
* @param string $join sql to do a join, added as is after the table-name, eg. ", table2 WHERE x=y" or
* @return array/boolean data if row could be retrived else False
*/
function read($keys,$extra_cols='',$join='')
{
if (!is_array($keys))
{
$pk = array_values($this->db_key_cols);
if ($pk) $keys = array($pk[0] => $keys);
}
$this->init($keys);
$this->data2db();
$query = false;
foreach ($this->db_key_cols as $db_col => $col)
{
if ($this->data[$col] != '')
{
$query[$db_col] = $this->data[$col];
}
}
if (!$query) // no primary key in keys, lets try the data_cols for a unique key
{
foreach($this->db_uni_cols as $db_col => $col)
{
if ($this->data[$col] != '')
{
$query[$db_col] = $this->data[$col];
}
}
}
if (!$query) // no unique key in keys, lets try everything else
{
foreach($this->db_data_cols as $db_col => $col)
{
if ($this->data[$col] != '')
{
$query[$db_col] = $this->data[$col];
}
}
}
if (!$query) // keys has no cols
{
$this->db2data();
return False;
}
$this->db->select($this->table_name,'*'.($extra_cols?','.(is_array($extra_cols)?implode(',',$extra_cols):$extra_cols):''),
$query,__LINE__,__FILE__,False,'',False,0,$join);
if (!($row = $this->db->row(true)))
{
if ($this->autoinc_id)
{
unset($this->data[$this->db_key_cols[$this->autoinc_id]]);
}
if ((int) $this->debug >= 4) echo "nothing found !!!</p>\n";
$this->db2data();
return False;
}
$cols = $this->db_cols;
if ($extra_cols) // extra columns to report
{
foreach(is_array($extra_cols) ? $extra_cols : array($extra_cols) as $col)
{
if (FALSE!==stripos($col,'as')) $col = preg_replace('/^.*as *([a-z0-9_]+) *$/i','\\1',$col);
$cols[$col] = $col;
}
}
foreach ($cols as $db_col => $col)
{
$this->data[$col] = $row[$db_col];
}
$this->db2data();
if ((int) $this->debug >= 4)
{
echo "data =\n"; _debug_array($this->data);
}
return $this->data;
}
/**
* saves the content of data to the db
*
* @param array $keys if given $keys are copied to data before saveing => allows a save as
* @return int 0 on success and errno != 0 else
*/
function save($keys=null)
{
if (is_array($keys) && count($keys)) $this->data_merge($keys);
$this->data2db();
if ((int) $this->debug >= 4) { echo "so_sql::save(".print_r($keys,true).") autoinc_id='$this->autoinc_id', data="; _debug_array($this->data); }
if ($this->autoinc_id && !$this->data[$this->db_key_cols[$this->autoinc_id]]) // insert with auto id
{
foreach($this->db_cols as $db_col => $col)
{
if (!$this->autoinc_id || $db_col != $this->autoinc_id) // not write auto-inc-id
{
if (!array_key_exists($col,$this->data) && // handling of unset columns in $this->data
(isset($this->table_def['fd'][$db_col]['default']) || // we have a default value
!isset($this->table_def['fd'][$db_col]['nullable']) || $this->table_def['fd'][$db_col]['nullable'])) // column is nullable
{
continue; // no need to write that (unset) column
}
$data[$db_col] = (string) $this->data[$col] === '' && $this->empty_on_write == 'NULL' ? null : $this->data[$col];
}
}
$this->db->insert($this->table_name,$data,false,__LINE__,__FILE__);
if ($this->autoinc_id)
{
$this->data[$this->db_key_cols[$this->autoinc_id]] = $this->db->get_last_insert_id($this->table_name,$this->autoinc_id);
}
}
else // insert in table without auto id or update of existing row, dont write colums unset in $this->data
{
foreach($this->db_data_cols as $db_col => $col)
{
// we need to update columns set to null: after a $this->data[$col]=null:
// - array_key_exits($col,$this->data) === true
// - isset($this->data[$col]) === false
if (!array_key_exists($col,$this->data) && // handling of unset columns in $this->data
($this->autoinc_id || // update of table with auto id or
isset($this->table_def['fd'][$db_col]['default']) || // we have a default value or
!isset($this->table_def['fd'][$db_col]['nullable']) || $this->table_def['fd'][$db_col]['nullable'])) // column is nullable
{
continue; // no need to write that (unset) column
}
$data[$db_col] = (string) $this->data[$col] === '' && $this->empty_on_write == 'NULL' ? null : $this->data[$col];
}
$keys = '';
foreach($this->db_key_cols as $db_col => $col)
{
$keys[$db_col] = $this->data[$col];
}
if (!$data && !$this->autoinc_id) // happens if all columns are in the primary key
{
$data = $keys;
$keys = False;
}
if (!$this->autoinc_id) // always try an insert if we have no autoinc_id, as we dont know if the data exists
{
$this->db->insert($this->table_name,$data,$keys,__LINE__,__FILE__);
}
else
{
$this->db->update($this->table_name,$data,$keys,__LINE__,__FILE__);
}
}
$this->db2data();
return $this->db->Errno;
}
/**
* deletes row representing keys in internal data or the supplied $keys if != null
*
* @param array $keys if given array with col => value pairs to characterise the rows to delete
* @return int affected rows, should be 1 if ok, 0 if an error
*/
function delete($keys=null)
{
if (!is_array($keys) || !count($keys)) // use internal data
{
$data = $this->data;
$keys = $this->db_key_cols;
}
else // data and keys are supplied in $keys
{
$data = $keys; $keys = array();
foreach($this->db_cols as $db_col => $col)
{
if (isset($data[$col]))
{
$keys[$db_col] = $col;
}
}
}
$data = $this->data2db($data);
foreach($keys as $db_col => $col)
{
$query[$db_col] = $data[$col];
}
$this->db->delete($this->table_name,$query,__LINE__,__FILE__);
return $this->db->affected_rows();
}
/**
* searches db for rows matching searchcriteria
*
* '*' and '?' are replaced with sql-wildcards '%' and '_'
*
* For a union-query you call search for each query with $start=='UNION' and one more with only $order_by and $start set to run the union-query.
*
* @param array/string $criteria array of key and data cols, OR a SQL query (content for WHERE), fully quoted (!)
* @param boolean/string/array $only_keys=true True returns only keys, False returns all cols. or
* comma seperated list or array of columns to return
* @param string $order_by='' fieldnames + {ASC|DESC} separated by colons ',', can also contain a GROUP BY (if it contains ORDER BY)
* @param string/array $extra_cols='' string or array of strings to be added to the SELECT, eg. "count(*) as num"
* @param string $wildcard='' appended befor and after each criteria
* @param boolean $empty=false False=empty criteria are ignored in query, True=empty have to be empty in row
* @param string $op='AND' defaults to 'AND', can be set to 'OR' too, then criteria's are OR'ed together
* @param mixed $start=false if != false, return only maxmatch rows begining with start, or array($start,$num), or 'UNION' for a part of a union query
* @param array $filter=null if set (!=null) col-data pairs, to be and-ed (!) into the query without wildcards
* @param string $join='' sql to do a join, added as is after the table-name, eg. "JOIN table2 ON x=y" or
* "LEFT JOIN table2 ON (x=y AND z=o)", Note: there's no quoting done on $join, you are responsible for it!!!
* @param boolean $need_full_no_count=false If true an unlimited query is run to determine the total number of rows, default false
* @return boolean/array of matching rows (the row is an array of the cols) or False
*/
function &search($criteria,$only_keys=True,$order_by='',$extra_cols='',$wildcard='',$empty=False,$op='AND',$start=false,$filter=null,$join='',$need_full_no_count=false)
{
if ((int) $this->debug >= 4) echo "<p>so_sql::search(".print_r($criteria,true).",'$only_keys','$order_by',".print_r($extra_cols,true).",'$wildcard','$empty','$op','$start',".print_r($filter,true).",'$join')</p>\n";
if (!is_array($criteria))
{
$query = $criteria;
}
else
{
$criteria = $this->data2db($criteria);
foreach($criteria as $col => $val)
{
if (is_int($col))
{
$query[] = $val;
}
elseif ($empty || $val != '')
{
if (!($db_col = array_search($col,$this->db_cols)))
{
$db_col = $col;
}
if ($wildcard || $criteria[$col]{0} == '!' ||
is_string($criteria[$col]) && (strpos($criteria[$col],'*')!==false || strpos($criteria[$col],'?')!==false))
{
$cmp_op = ' '.$this->db->capabilities['case_insensitive_like'].' ';
if ($criteria[$col]{0} == '!')
{
$cmp_op = ' NOT'.$cmp_op;
$criteria[$col] = substr($criteria[$col],1);
}
$query[] = $db_col.$cmp_op.$this->db->quote($wildcard.str_replace(array('%','_','*','?'),array('\\%','\\_','%','_'),$criteria[$col]).$wildcard);
}
elseif (strpos($db_col,'.')!==false) // we have a table-name specified
{
list($table,$only_col) = explode('.',$db_col);
$table_def = $this->db->get_table_definitions(true,$table);
$query[] = $db_col.(is_array($val) ? ' IN ' : '=').$this->db->quote($val,$table_def['fd'][$only_col]);
}
else
{
$query[$db_col] = $criteria[$col];
}
}
}
if (is_array($query) && $op != 'AND') $query = $this->db->column_data_implode(' '.$op.' ',$query);
}
if (is_array($filter))
{
$db_filter = array();
$data2db_filter = $this->data2db($filter);
if (!is_array($data2db_filter)) {
echo function_backtrace()."<br/>\n";
echo "filter=";_debug_array($filter);
echo "data2db(filter)=";_debug_array($data2db_filter);
}
foreach($data2db_filter as $col => $val)
{
if ($val !== '')
{
// check if a db-internal name conversation necessary
if (!is_int($col) && ($c = array_search($col,$this->db_cols)))
{
$col = $c;
}
if(is_int($col))
{
$db_filter[] = $val;
}
elseif ($val === "!''")
{
$db_filter[] = $col." != ''";
}
else
{
$db_filter[$col] = $val;
}
}
}
if ($query)
{
if ($op != 'AND')
{
$db_filter[] = '('.$this->db->column_data_implode(' '.$op.' ',$query).')';
}
else
{
$db_filter = array_merge($db_filter,$query);
}
}
$query = $db_filter;
}
if ((int) $this->debug >= 4)
{
echo "<p>so_sql::search(,only_keys=$only_keys,order_by='$order_by',wildcard='$wildcard',empty=$empty,$op,start='$start',".print_r($filter,true).") query=".print_r($query,true).", total='$this->total'</p>\n";
echo "<br>criteria = "; _debug_array($criteria);
}
if ($only_keys === true)
{
$colums = implode(',',array_keys($this->db_key_cols));
}
elseif (is_array($only_keys))
{
$colums = array();
foreach($only_keys as $key => $col)
{
$colums[] = ($db_col = array_search($col,$this->db_cols)) ? $db_col : $col;
}
$colums = implode(',',$colums);
}
elseif (!$only_keys)
{
$colums = '*';
}
else
{
$colums = $only_keys;
}
if ($extra_cols) $colums .= ($colums ? ',' : '').(is_array($extra_cols) ? implode(',',$extra_cols) : $extra_cols);
$num_rows = 0; // as spec. in max_matches in the user-prefs
if (is_array($start)) list($start,$num_rows) = $start;
if ($order_by && stripos($order_by,'ORDER BY')===false && stripos($order_by,'GROUP BY')===false)
{
$order_by = 'ORDER BY '.$order_by;
}
static $union = array();
static $union_cols = array();
if ($start === 'UNION' || $union)
{
if ($start === 'UNION')
{
$union[] = array(
'table' => $this->table_name,
'cols' => $colums,
'where' => $query,
'append' => $order_by,
'join' => $join,
);
if (!$union_cols) // union used the colum-names of the first query
{
$union_cols = $this->_get_columns($only_keys,$extra_cols);
}
return true; // waiting for further calls, before running the union-query
}
// running the union query now
if ($start !== false && $num_rows != 1) // need to get the total too, saved in $this->total
{
if ($this->db->Type == 'mysql' && $this->db->ServerInfo['version'] >= 4.0)
{
$union[0]['cols'] = ($mysql_calc_rows = 'SQL_CALC_FOUND_ROWS ').$union[0]['cols'];
}
else // cant do a count, have to run the query without limit
{
$this->db->union($union,__LINE__,__FILE__);
$this->total = $this->db->num_rows();
}
}
$this->db->union($union,__LINE__,__FILE__,$order_by,$start,$num_rows);
$cols = $union_cols;
$union = $union_cols = array();
}
else // no UNION
{
if ($start !== false && $num_rows != 1) // need to get the total too, saved in $this->total
{
if ($this->db->Type == 'mysql' && $this->db->ServerInfo['version'] >= 4.0)
{
$mysql_calc_rows = 'SQL_CALC_FOUND_ROWS ';
}
elseif (!$need_full_no_count && (!$join || stripos($join,'LEFT JOIN')!==false))
{
$this->db->select($this->table_name,'COUNT(*)',$query,__LINE__,__FILE__);
$this->total = $this->db->next_record() ? (int) $this->db->f(0) : false;
}
else // cant do a count, have to run the query without limit
{
$this->db->select($this->table_name,$colums,$query,__LINE__,__FILE__,false,$order_by,false,0,$join);
$this->total = $this->db->num_rows();
}
}
$this->db->select($this->table_name,$mysql_calc_rows.$colums,$query,__LINE__,__FILE__,
$start,$order_by,false,$num_rows,$join);
$cols = $this->_get_columns($only_keys,$extra_cols);
}
if ((int) $this->debug >= 4) echo "<p>sql='{$this->db->Query_ID->sql}'</p>\n";
if ($mysql_calc_rows)
{
$this->total = $this->db->Link_ID->GetOne('SELECT FOUND_ROWS()');
}
$arr = array();
for ($n = 0; ($row = $this->db->row(true)); ++$n)
{
$data = array();
foreach($cols as $db_col => $col)
{
$data[$col] = $row[$db_col];
}
$arr[] = $this->db2data($data);
}
return $n ? $arr : False;
}
/**
* extract the requested columns from $only_keys and $extra_cols param of a search
*
* @internal
* @param boolean/string $only_keys=true True returns only keys, False returns all cols. comma seperated list of keys to return
* @param string/array $extra_cols='' string or array of strings to be added to the SELECT, eg. "count(*) as num"
* @return array with columns as db-name => internal-name pairs
*/
function _get_columns($only_keys,$extra_cols)
{
//echo "_get_columns() only_keys="; _debug_array($only_keys); echo "extra_cols="; _debug_array($extra_cols);
if ($only_keys === true) // only primary key
{
$cols = $this->db_key_cols;
}
else
{
$cols = array();
foreach(is_array($only_keys) ? $only_keys : explode(',',str_replace(array('DISTINCT ','distinct '),'',$only_keys)) as $col)
{
if (!$col || $col == '*' || $col == $this->table_name.'.*') // all columns
{
$cols = array_merge($cols,$this->db_cols);
}
else // only the specified columns
{
if (stripos($col,'as')!==false) $col = preg_replace('/^.*as +([a-z0-9_]+) *$/i','\\1',$col);
if (($db_col = array_search($col,$this->db_cols)) !== false)
{
$cols[$db_col] = $col;
}
else
{
$cols[$col] = isset($this->db_cols[$col]) ? $this->db_cols[$col] : $col;
}
}
}
}
if ($extra_cols) // extra columns to report
{
foreach(is_array($extra_cols) ? $extra_cols : explode(',',$extra_cols) as $col)
{
if (stripos($col,'as ')!==false) $col = preg_replace('/^.*as +([a-z0-9_]+) *$/i','\\1',$col);
if (($db_col = array_search($col,$this->db_cols)) !== false)
{
$cols[$db_col] = $col;
}
else
{
$cols[$col] = isset($this->db_cols[$col]) ? $this->db_cols[$col] : $col;
}
}
}
return $cols;
}
/**
* query rows for the nextmatch widget
*
* @param array $query with keys 'start', 'search', 'order', 'sort', 'col_filter'
* For other keys like 'filter', 'cat_id' you have to reimplement this method in a derived class.
* @param array &$rows returned rows/competitions
* @param array &$readonlys eg. to disable buttons based on acl, not use here, maybe in a derived class
* @param string $join='' sql to do a join, added as is after the table-name, eg. ", table2 WHERE x=y" or
* "LEFT JOIN table2 ON (x=y)", Note: there's no quoting done on $join!
* @param boolean $need_full_no_count=false If true an unlimited query is run to determine the total number of rows, default false
* @return int total number of rows
*/
function get_rows($query,&$rows,&$readonlys,$join='',$need_full_no_count=false)
{
if ((int) $this->debug >= 4)
{
echo "<p>so_sql::get_rows(".print_r($query,true).",,)</p>\n";
}
$criteria = array();
if ($query['search'])
{
foreach($this->db_cols as $col) // we search all cols
{
$criteria[$col] = $query['search'];
}
}
$rows = (array) $this->search($criteria,false,$query['order']?$query['order'].' '.$query['sort']:'',
'','%',false,'OR',(int)$query['start'],$query['col_filter'],$join,$need_full_no_count);
return $this->total;
}
/**
* Check if values for unique keys are unique
*
* @param array $data data-set to check, defaults to $this->data
* @return int 0: all keys are unique, 1: first key not unique, 2: ...
*/
function not_unique($data=null)
{
if (!is_array($data))
{
$data = $this->data;
}
$n = 1;
foreach($this->db_uni_cols as $db_col => $col)
{
if (list($other) = $this->search(array($db_col => $data[$col]),false,'','','',false,'AND',false,null,''))
{
foreach($this->db_key_cols as $db_key_col => $key_col)
{
if ($data[$key_col] != $other[$key_col])
{
if ((int) $this->debug >= 4)
{
echo "<p>not_unique in '$col' as for '$key_col': '${data[$key_col]}' != '${other[$key_col]}'</p>\n";
}
return $n; // different entry => $n not unique
}
}
}
++$n;
}
return 0;
}
/**
* Query DB for a list / array with one colum as key and an other one(s) as value, eg. id => title pairs
*
* We do some caching as these kind of function is usualy called multiple times, eg. for option-lists.
*
* @param string $value_col array of column-names for the values of the array, can also be an expression aliased with AS,
* if more then one column given, an array with keys identical to the given ones is returned and not just the value of the column
* @param string $key_col='' column-name for the keys, default '' = same as (first) $value_col: returns a distinct list
* @param array $filter=array() to filter the entries
* @param string $order='' order, default '' = same as (first) $value_col
* @return array with key_col => value_col pairs or array if more then one value_col given (keys as in value_col)
*/
function query_list($value_col,$key_col='',$filter=array(),$order='')
{
static $cache = array();
$cache_key = serialize($value_col).'-'.$key_col.'-'.serialize($filter).'-'.$order;
if (isset($cache[$cache_key]))
{
return $cache[$cache_key];
}
if (!is_array($value_col)) $value_col = array($value_col);
$cols = array();
foreach($value_col as $key => $col)
{
$cols[$key] = preg_match('/AS ([a-z_0-9]+)$/i',$col,$matches) ? $matches[1] : $col;
}
if (!$order) $order = current($cols);
if (($search =& $this->search(array(),($key_col ? $key_col.',' : 'DISTINCT ').implode(',',$value_col),$order,'','',false,'AND',false,$filter)))
{
if (preg_match('/AS ([a-z_0-9]+)$/i',$key_col,$matches))
{
$key_col = $matches[1];
}
elseif (!$key_col)
{
$key_col = current($cols);
}
foreach($search as $row)
{
if (count($cols) > 1)
{
$data = array();
foreach($cols as $key => $col)
{
$data[$key] = $row[$col];
}
}
else
{
$data = $row[current($cols)];
}
$ret[$row[$key_col]] = $data;
}
}
return $cache[$cache_key] =& $ret;
}
}
if (!function_exists("stripos"))
{
/**
* stripos for php < 5
*/
function stripos($str,$needle,$offset=0)
{
return strpos(strtolower($str),strtolower($needle),$offset);
}
}