PHPExcel_Calculation

# Source for file Database.php Documentation is available at Database.php <?php /** * PHPExcel * * Copyright (c) 2006 - 2011 PHPExcel * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * * @category PHPExcel * @package PHPExcel_Calculation * @copyright Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel) * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL * @version 1.7.6, 2011-02-27 */ /** PHPExcel root directory */ if (!defined('PHPEXCEL_ROOT')) { /** * @ignore */ define('PHPEXCEL_ROOT', dirname(__FILE__) . '/../../'); require(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php'); } /** * PHPExcel_Calculation_Database * * @category PHPExcel * @package PHPExcel_Calculation * @copyright Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel) */ class PHPExcel_Calculation_Database { private static function __fieldExtract($database,$field) { $field = strtoupper(PHPExcel_Calculation_Functions::flattenSingleValue($field)); $fieldNames = array_map('strtoupper',array_shift($database)); if (is_numeric($field)) { $keys = array_keys($fieldNames); return $keys[$field-1]; } $key = array_search($field,$fieldNames); return ($key) ? $key : null; } private static function __filter($database,$criteria) { $fieldNames = array_shift($database); $criteriaNames = array_shift($criteria); // Convert the criteria into a set of AND/OR conditions with [:placeholders] $testConditions = $testValues = array(); $testConditionsCount = 0; foreach($criteriaNames as $key => $criteriaName) { $testCondition = array(); $testConditionCount = 0; foreach($criteria as $row => $criterion) { if ($criterion[$key] > '') { $testCondition[] = '[:'.$criteriaName.']'.PHPExcel_Calculation_Functions::_ifCondition($criterion[$key]); $testConditionCount++; } } if ($testConditionCount > 1) { $testConditions[] = 'OR('.implode(',',$testCondition).')'; $testConditionsCount++; } elseif($testConditionCount == 1) { $testConditions[] = $testCondition[0]; $testConditionsCount++; } } if ($testConditionsCount > 1) { $testConditionSet = 'AND('.implode(',',$testConditions).')'; } elseif($testConditionsCount == 1) { $testConditionSet = $testConditions[0]; } // Loop through each row of the database foreach($database as $dataRow => $dataValues) { // Substitute actual values from the database row for our [:placeholders] $testConditionList = $testConditionSet; foreach($criteriaNames as $key => $criteriaName) { $k = array_search($criteriaName,$fieldNames); if (isset($dataValues[$k])) { $dataValue = $dataValues[$k]; $dataValue = (is_string($dataValue)) ? PHPExcel_Calculation::_wrapResult(strtoupper($dataValue)) : $dataValue; $testConditionList = str_replace('[:'.$criteriaName.']',$dataValue,$testConditionList); } } // evaluate the criteria against the row data $result = PHPExcel_Calculation::getInstance()->_calculateFormulaValue('='.$testConditionList); // If the row failed to meet the criteria, remove it from the database if (!$result) { unset($database[$dataRow]); } } return $database; } /** * DAVERAGE * */ public static function DAVERAGE($database,$field,$criteria) { $field = self::__fieldExtract($database,$field); if (is_null($field)) { return NULL; } // reduce the database to a set of rows that match all the criteria $database = self::__filter($database,$criteria); // extract an array of values for the requested column $colData = array(); foreach($database as $row) { $colData[] = $row[$field]; } // Return return PHPExcel_Calculation_Statistical::AVERAGE($colData); } // function DAVERAGE() /** * DCOUNT * */ public static function DCOUNT($database,$field,$criteria) { $field = self::__fieldExtract($database,$field); if (is_null($field)) { return NULL; } // reduce the database to a set of rows that match all the criteria $database = self::__filter($database,$criteria); // extract an array of values for the requested column $colData = array(); foreach($database as $row) { $colData[] = $row[$field]; } // Return return PHPExcel_Calculation_Statistical::COUNT($colData); } // function DCOUNT() /** * DCOUNTA * */ public static function DCOUNTA($database,$field,$criteria) { $field = self::__fieldExtract($database,$field); if (is_null($field)) { return NULL; } // reduce the database to a set of rows that match all the criteria $database = self::__filter($database,$criteria); // extract an array of values for the requested column $colData = array(); foreach($database as $row) { $colData[] = $row[$field]; } // Return return PHPExcel_Calculation_Statistical::COUNTA($colData); } // function DCOUNTA() /** * DGET * */ public static function DGET($database,$field,$criteria) { $field = self::__fieldExtract($database,$field); if (is_null($field)) { return NULL; } // reduce the database to a set of rows that match all the criteria $database = self::__filter($database,$criteria); // extract an array of values for the requested column $colData = array(); foreach($database as $row) { $colData[] = $row[$field]; } // Return if (count($colData) > 1) { return PHPExcel_Calculation_Functions::NaN(); } return $colData[0]; } // function DGET() /** * DMAX * */ public static function DMAX($database,$field,$criteria) { $field = self::__fieldExtract($database,$field); if (is_null($field)) { return NULL; } // reduce the database to a set of rows that match all the criteria $database = self::__filter($database,$criteria); // extract an array of values for the requested column $colData = array(); foreach($database as $row) { $colData[] = $row[$field]; } // Return return PHPExcel_Calculation_Statistical::MAX($colData); } // function DMAX() /** * DMIN * */ public static function DMIN($database,$field,$criteria) { $field = self::__fieldExtract($database,$field); if (is_null($field)) { return NULL; } // reduce the database to a set of rows that match all the criteria $database = self::__filter($database,$criteria); // extract an array of values for the requested column $colData = array(); foreach($database as $row) { $colData[] = $row[$field]; } // Return return PHPExcel_Calculation_Statistical::MIN($colData); } // function DMIN() /** * DPRODUCT * */ public static function DPRODUCT($database,$field,$criteria) { $field = self::__fieldExtract($database,$field); if (is_null($field)) { return NULL; } // reduce the database to a set of rows that match all the criteria $database = self::__filter($database,$criteria); // extract an array of values for the requested column $colData = array(); foreach($database as $row) { $colData[] = $row[$field]; } // Return return PHPExcel_Calculation_MathTrig::PRODUCT($colData); } // function DPRODUCT() /** * DSTDEV * */ public static function DSTDEV($database,$field,$criteria) { $field = self::__fieldExtract($database,$field); if (is_null($field)) { return NULL; } // reduce the database to a set of rows that match all the criteria $database = self::__filter($database,$criteria); // extract an array of values for the requested column $colData = array(); foreach($database as $row) { $colData[] = $row[$field]; } // Return return PHPExcel_Calculation_Statistical::STDEV($colData); } // function DSTDEV() /** * DSTDEVP * */ public static function DSTDEVP($database,$field,$criteria) { $field = self::__fieldExtract($database,$field); if (is_null($field)) { return NULL; } // reduce the database to a set of rows that match all the criteria $database = self::__filter($database,$criteria); // extract an array of values for the requested column $colData = array(); foreach($database as $row) { $colData[] = $row[$field]; } // Return return PHPExcel_Calculation_Statistical::STDEVP($colData); } // function DSTDEVP() /** * DSUM * */ public static function DSUM($database,$field,$criteria) { $field = self::__fieldExtract($database,$field); if (is_null($field)) { return NULL; } // reduce the database to a set of rows that match all the criteria $database = self::__filter($database,$criteria); // extract an array of values for the requested column $colData = array(); foreach($database as $row) { $colData[] = $row[$field]; } // Return return PHPExcel_Calculation_MathTrig::SUM($colData); } // function DSUM() /** * DVAR * */ public static function DVAR($database,$field,$criteria) { $field = self::__fieldExtract($database,$field); if (is_null($field)) { return NULL; } // reduce the database to a set of rows that match all the criteria $database = self::__filter($database,$criteria); // extract an array of values for the requested column $colData = array(); foreach($database as $row) { $colData[] = $row[$field]; } // Return return PHPExcel_Calculation_Statistical::VARFunc($colData); } // function DVAR() /** * DVARP * */ public static function DVARP($database,$field,$criteria) { $field = self::__fieldExtract($database,$field); if (is_null($field)) { return NULL; } // reduce the database to a set of rows that match all the criteria $database = self::__filter($database,$criteria); // extract an array of values for the requested column $colData = array(); foreach($database as $row) { $colData[] = $row[$field]; } // Return return PHPExcel_Calculation_Statistical::VARP($colData); } // function DVARP() } // class PHPExcel_Calculation_Database Documentation generated on Sun, 27 Feb 2011 16:29:19 -0800 by phpDocumentor 1.4.3