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signaturepdf/vendor/fatfree/lib/matrix.php

140 lines
3.7 KiB
PHP

<?php
/*
Copyright (c) 2009-2019 F3::Factory/Bong Cosca, All rights reserved.
This file is part of the Fat-Free Framework (http://fatfreeframework.com).
This is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or later.
Fat-Free Framework 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
General Public License for more details.
You should have received a copy of the GNU General Public License along
with Fat-Free Framework. If not, see <http://www.gnu.org/licenses/>.
*/
//! Generic array utilities
class Matrix extends Prefab {
/**
* Retrieve values from a specified column of a multi-dimensional
* array variable
* @return array
* @param $var array
* @param $col mixed
**/
function pick(array $var,$col) {
return array_map(
function($row) use($col) {
return $row[$col];
},
$var
);
}
/**
* select a subset of fields from an input array
* @param string|array $fields splittable string or array
* @param string|array $data hive key or array
* @return array
*/
function select($fields, $data) {
return array_intersect_key(is_array($data) ? $data : \Base::instance()->get($data),
array_flip(is_array($fields) ? $fields : \Base::instance()->split($fields)));
}
/**
* walk with a callback function through a subset of fields from an input array
* the callback receives the value, index-key and the full input array as parameters
* set value parameter as reference and you're able to modify the data as well
* @param string|array $fields splittable string or array of fields
* @param string|array $data hive key or input array
* @param callable $callback (mixed &$value, string $key, array $data)
* @return array modified subset data
*/
function walk($fields, $data, $callback) {
$subset=$this->select($fields, $data);
array_walk($subset, $callback, $data);
return $subset;
}
/**
* Rotate a two-dimensional array variable
* @return NULL
* @param $var array
**/
function transpose(array &$var) {
$out=[];
foreach ($var as $keyx=>$cols)
foreach ($cols as $keyy=>$valy)
$out[$keyy][$keyx]=$valy;
$var=$out;
}
/**
* Sort a multi-dimensional array variable on a specified column
* @return bool
* @param $var array
* @param $col mixed
* @param $order int
**/
function sort(array &$var,$col,$order=SORT_ASC) {
uasort(
$var,
function($val1,$val2) use($col,$order) {
list($v1,$v2)=[$val1[$col],$val2[$col]];
$out=is_numeric($v1) && is_numeric($v2)?
Base::instance()->sign($v1-$v2):strcmp($v1,$v2);
if ($order==SORT_DESC)
$out=-$out;
return $out;
}
);
$var=array_values($var);
}
/**
* Change the key of a two-dimensional array element
* @return NULL
* @param $var array
* @param $old string
* @param $new string
**/
function changekey(array &$var,$old,$new) {
$keys=array_keys($var);
$vals=array_values($var);
$keys[array_search($old,$keys)]=$new;
$var=array_combine($keys,$vals);
}
/**
* Return month calendar of specified date, with optional setting for
* first day of week (0 for Sunday)
* @return array
* @param $date string|int
* @param $first int
**/
function calendar($date='now',$first=0) {
$out=FALSE;
if (extension_loaded('calendar')) {
if (is_string($date))
$date=strtotime($date);
$parts=getdate($date);
$days=cal_days_in_month(CAL_GREGORIAN,$parts['mon'],$parts['year']);
$ref=date('w',strtotime(date('Y-m',$parts[0]).'-01'))+(7-$first)%7;
$out=[];
for ($i=0;$i<$days;++$i)
$out[floor(($ref+$i)/7)][($ref+$i)%7]=$i+1;
}
return $out;
}
}