I wish to use a function with an arbitrary number of arguments to edit an array. The code I have so far is:
function setProperty()
{
$numargs = func_num_args();
$arglist = func_get_args();
$toedit = array();
for ($i = 0; $i < $numargs-1; $i++)
{
$toedit[] = $arglist[$i];
}
$array[] = $arglist[$numargs-1];
}
The idea of the code being I can do the following:
setProperty('array', '2nd-depth', '3rd', 'value1');
setProperty('array', 'something', 'x', 'value2');
setProperty('Another value','value3');
Resulting in the following array:
Array
(
[array] => Array
(
[2nd-depth] => Array
(
[3rd] => value1
)
[something] => Array
(
[x] => value2
)
)
[Another Value] => value3
)
The issue I believe is with the line:
$toedit[] = $arglist[$i];
What does this line need to be to achieve the required functionality?
Cheers,
You need to walk the path to the destination before storing the new value. You can do this with a reference:
function setProperty() {
$numargs = func_num_args();
if ($numargs < 2) return false; // not enough arguments
$arglist = func_get_args();
// reference for array walk
$ar = &$array;
// walk the array to the destination
for ($i=0; $i<$numargs-1; $i++) {
$key = $arglist[$i];
// create array if not already existing
if (!isset($ar[$key])) $ar[$key] = array();
// update array reference
$ar = &$ar[$key];
}
// add value
$ar = $arglist[$numargs-1];
}
But the question where this $array should be stored still remains.
class foo {
private $storage;
function setProperty()
{
$arglist = func_get_args();
if(count($argslist) < 2) return false;
$target = &$this->storage;
while($current = array_shift($arglist)){
if(count($arglist)==1){
$target[$current] = array_shift($arglist);
break;
}
if(!isset($target[$current])) $target[$current] = array();
$target = &$target[$current];
}
}
}
Try using foreach to loop through your array first. Then to handle children, you pass it to a child function that will grab everything.
I also recommend using the function sizeof() to determine how big your arrays are first, so you'll know your upper bounds.
Related
I have an array like below
Array
(
[0] => country-indonesia
[1] => country-myanmar
[2] => access-is_airport
[3] => heritage-is_seagypsy
)
From that array I want to make separate array only for [country] ,[access], [heritage]
So for that I have to check array value by text before '-'. I am not sure how to do it. so i can't apply code here. I just have the array in PHP
A modified answer, if you want to get the specific types only.
<?php
$arr = [
'country-indonesia',
'country-myanmar',
'access-is_airport',
'heritage-is_seagypsy',
];
$new_array = [];
$types = ['country', 'heritage', 'access'];
foreach ($arr as $element) {
$fac = explode('-', $element);
foreach ($types as $type) {
if ($fac[0] === $type) {
$new_array[$type][] = $fac[1];
}
}
}
$country = $new_array['country'];
$access = $new_array['access'];
$heritage = $new_array['heritage'];
var_dump($new_array);
A simple and easy solution in 3 lines of code using array_walk
<?php
$arr = [
'country-indonesia',
'country-myanmar',
'access-is_airport',
'heritage-is_seagypsy',
];
$new_array = [];
array_walk($arr, function($item) use (&$new_array){
//if(false === strpos($item, '-')) return;
list($key,$value) = explode('-', $item, 2);
$new_array[$key][] = $value;
});
print_r($new_array);
Gives this output:
Array
(
[country] => Array
(
[0] => indonesia
[1] => myanmar
)
[access] => Array
(
[0] => is_airport
)
[heritage] => Array
(
[0] => is_seagypsy
)
)
If you don't want empty and duplicate entries:
<?php
$arr = [
'country-indonesia',
'country-myanmar',
'access-is_airport',
'heritage-is_seagypsy',
];
$new_array = [];
array_walk($arr, function($item) use (&$new_array){
if(false === strpos($item, '-')) return;
list($key,$value) = explode('-', $item, 2);
if(empty($value) || array_key_exists($key, $new_array) && in_array($value, $new_array[$key])) return;
$new_array[$key][] = $value;
});
print_r($new_array);
you can do it by using explode and in_array functions
<?php
$arr = ["country-indonesia","country-myanmar","access-is_airport","heritage-is_seagypsy"];
$newArr = array();
foreach($arr as $k=> $val){
$valArr = explode("-", $val);
if(!in_array($valArr[0], $newArr)){
$newArr[] = $valArr[0];
}
}
print_r($newArr);
?>
live demo
You need PHP's strpos() function.
Just loop through every element of the array and try something like:
if( strpos($array[$i], "heritage") != false )
{
// Found heritage, do something with it
}
(Rough example written from my cellphone while feeding baby, may have typos but it's the basics of what you need)
Read further here: http://php.net/manual/en/function.strpos.php
//first lets set a variable equal to our array for ease in working with i.e
// also create a new empty array to hold our filtered values
$countryArray = array();
$accessArray = array();
$heritageArray = array();
$oldArray = Array(country-indonesia, country-myanmar, access-is_airport, heritage-is_seagypsy);
//Next loop through our array i.e
for($x = 0; $x < count($oldArray); $x++){
// now filter through the array contents
$currentValue = $oldArray[$x];
// check whether the current index has any of the strings in it [country] ,[access], [heritage] using the method : strpos()
if(strpos($currentValue,'country')){
//if this particular value contains the keyword push it into our new country array //using the array_push() function.
array_push($countryArray,$currentValue);
}elseif(strpos($currentValue,'access')){
// else check for the access string in our current value
// once it's found the current value will be pushed to the $accessArray
array_push($accessArray,$currentValue);
}elseif(strpos($currentValue,'heritage')){
// check for the last string value i.e access. If found this too should be pushed to //the new heritage array i.e
array_push($heritageArray,$currentValue);
}else{
// do nothing
}
}
//I believe that should work: cheers hope
I have q question: what is the easiest way to create multi-dimensional array in php dynamically?
Here a static version:
$tab['k1']['k2']['k3'] = 'value';
I would like to avoid eval()
I'm not successful with variable variable ($$)
so I'm trying to develop a function fun with such interface:
$tab = fun( $tab, array( 'k1', 'k2', 'k3' ), 'value' );
Do you have a solution? What is the simplest way?
regards,
Annie
There are a number of ways to achieve this, but here is one which uses PHP's ability to have N arguments passed to a function. This gives you the flexibility of creating an array with a depth of 3, or 2, or 7 or whatever.
// pass $value as first param -- params 2 - N define the multi array
function MakeMultiArray()
{
$args = func_get_args();
$output = array();
if (count($args) == 1)
$output[] = $args[0]; // just the value
else if (count($args) > 1)
{
$output = $args[0];
// loop the args from the end to the front to make the array
for ($i = count($args)-1; $i >= 1; $i--)
{
$output = array($args[$i] => $output);
}
}
return $output;
}
Here's how it would work:
$array = MakeMultiArray('value', 'k1', 'k2', 'k3');
And will produce this:
Array
(
[k1] => Array
(
[k2] => Array
(
[k3] => value
)
)
)
Following function will work for any number of keys.
function fun($keys, $value) {
// If not keys array found then return false
if (empty($keys)) return false;
// If only one key then
if (count($keys) == 1) {
$result[$keys[0]] = $value;
return $result;
}
// prepare initial array with first key
$result[array_shift($keys)] = '';
// now $keys = ['key2', 'key3']
// get last key of array
$last_key = end($keys);
foreach($keys as $key) {
$val = $key == $last_key ? $value : '';
array_walk_recursive($result, function(&$item, $k) use ($key, $val) {
$item[$key] = $val;
});
}
return $result;
}
This should work if $tab always has 3 indices:
function func(&$name, $indices, $value)
{
$name[$indices[0]][$indices[1]][$indices[2]] = $value;
};
func($tab, array( 'k1', 'k2', 'k3' ), 'value' );
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
String with array structure to Array
I have a string "db/yum/user", and I'm trying to explode it so each element of / becomes a deeper dimension.
So the direct method of creating the data variable would be
$config['db']['yum']['user'] = "val";
My attempt so far:
$config = array();
function set_config($key,$value){
global $config;
//Multi deminsional config
$multi_configs = explode('/',$key);
if($multi_configs!==false){
$build_up = array();
$c =& $build_up;
foreach($multi_configs as $multi_config){
$c[$multi_config] = array();
$c =& $c[$multi_config];
}
//$c = $value;
array_merge($config,$c);
return;
}
$config[$key] = $value;
}
set_config('db/yum/user','val');
set_config('db/yum/server','val2');
//etc,etc,etc, this was modified to make more sense in this context.
This is probably what you are looking for:
#!/usr/bin/php
<?php
$config = array();
function set_config($key, $value) {
global $config;
if (FALSE=== ($levels=explode('/',$key)))
return;
$pointer = &$config;
for ($i=0; $i<sizeof($levels); $i++) {
if (!isset($pointer[$levels[$i]]))
$pointer[$levels[$i]]=array();
$pointer=&$pointer[$levels[$i]];
} // for
$pointer=$value;
} // set_config
set_config('db/yum/user','val');
set_config('db/yum/server','val2');
print_r($config);
?>
The output is:
Array
(
[db] => Array
(
[yum] => Array
(
[user] => val
[server] => val2
)
)
)
You can also achieve the same solution using a tree structure in the array . Here is the code to construct the array :
$arr = array (5,6);
$new_arr=array ();
$prev=0;
foreach ($arr as $val) {
$new_arr[$prev] = $val;
$prev=$val;
}
$new_arr[$prev]="value";
Here is the code to retrieve the value:
function retrieve ($arr) {
$prev=0;
while (1) {
if (! isset($arr[$prev] ) )
break;
else $prev = $arr[$prev];
}
return $prev;
}
I have an array of my inventory (ITEMS A & B)
Items A & B are sold as sets of 1 x A & 2 x B.
The items also have various properties which don't affect how they are distributed into sets.
For example:
$inventory=array(
array("A","PINK"),
array("A","MAUVE"),
array("A","ORANGE"),
array("A","GREY"),
array("B","RED"),
array("B","BLUE"),
array("B","YELLOW"),
array("B","GREEN"),
array("B","BLACK")
);
I want to redistribute the array $inventory to create $set(s) such that
$set[0] => Array
(
[0] => array(A,PINK)
[1] => array(B,RED)
[2] => array(B,BLUE)
)
$set[1] => Array
(
[0] => array(A,MAUVE)
[1] => array(B,YELLOW)
[2] => array(B,GREEN)
)
$set[2] => Array
(
[0] => array(A,ORANGE)
[1] => array(B,BLACK)
[2] => NULL
)
$set[3] => Array
(
[0] => array(A,GREY)
[1] => NULL
[2] => NULL
)
As you can see. The items are redistributed in the order in which they appear in the inventory to create a set of 1 x A & 2 x B. The colour doesn't matter when creating the set. But I need to be able to find out what colour went into which set after the $set array is created. Sets are created until all inventory is exhausted. Where an inventory item doesn't exist to go into a set, a NULL value is inserted.
Thanks in advance!
I've assumed that all A's come before all B's:
$inventory=array(
array("A","PINK"),
array("A","MAUVE"),
array("A","ORANGE"),
array("A","GREY"),
array("B","RED"),
array("B","BLUE"),
array("B","YELLOW"),
array("B","GREEN"),
array("B","BLACK")
);
for($b_start_index = 0;$b_start_index<count($inventory);$b_start_index++) {
if($inventory[$b_start_index][0] == 'B') {
break;
}
}
$set = array();
for($i=0,$j=$b_start_index;$i!=$b_start_index;$i++,$j+=2) {
isset($inventory[$j])?$temp1=$inventory[$j]:$temp1 = null;
isset($inventory[$j+1])?$temp2=$inventory[$j+1]:$temp2 = null;
$set[] = array( $inventory[$i], $temp1, $temp2);
}
To make it easier to use your array, you should make it something like this
$inv['A'] = array(
'PINK',
'MAUVE',
'ORANGE',
'GREY'
);
$inv['B'] = array(
'RED',
'BLUE',
'YELLOW',
'GREEN',
'BLACK'
);
This way you can loop through them separately.
$createdSets = $setsRecord = $bTemp = array();
$bMarker = 1;
$aIndex = $bIndex = 0;
foreach($inv['A'] as $singles){
$bTemp[] = $singles;
$setsRecord[$singles][] = $aIndex;
for($i=$bIndex; $i < ($bMarker*2); ++$i) {
//echo $bIndex.' - '.($bMarker*2).'<br/>';
if(empty($inv['B'][$i])) {
$bTemp[] = 'null';
} else {
$bTemp[] = $inv['B'][$i];
$setsRecord[$inv['B'][$i]][] = $aIndex;
}
}
$createdSets[] = $bTemp;
$bTemp = array();
++$bMarker;
++$aIndex;
$bIndex = $bIndex + 2;
}
echo '<pre>';
print_r($createdSets);
print_r($setsRecord);
echo '</pre>';
To turn your array into an associative array, something like this can be done
<?php
$inventory=array(
array("A","PINK"),
array("A","MAUVE"),
array("A","ORANGE"),
array("A","GREY"),
array("B","RED"),
array("B","BLUE"),
array("B","YELLOW"),
array("B","GREEN"),
array("B","BLACK")
);
$inv = array();
foreach($inventory as $item){
$inv[$item[0]][] = $item[1];
}
echo '<pre>';
print_r($inv);
echo '</pre>';
Maybe you can use this function, assuming that:
... $inventory is already sorted (all A come before B)
... $inventory is a numeric array staring at index zero
// $set is the collection to which the generated sets are appended
// $inventory is your inventory, see the assumptions above
// $aCount - the number of A elements in a set
// $bCount - the number of B elements in a set
function makeSets(array &$sets, array $inventory, $aCount, $bCount) {
// extract $aItems from $inventory and shorten $inventory by $aCount
$aItems = array_splice($inventory, 0, $aCount);
$bItems = array();
// iterate over $inventory until a B item is found
foreach($inventory as $index => $item) {
if($item[0] == 'B') {
// extract $bItems from $inventory and shorten $inventory by $bCount
// break out of foreach loop after that
$bItems = array_splice($inventory, $index, $bCount);
break;
}
}
// append $aItems and $bItems to $sets, padd this array with null if
// less then $aCount + $bCount added
$sets[] = array_pad(array_merge($aItems, $bItems), $aCount + $bCount, null);
// if there are still values left in $inventory, call 'makeSets' again
if(count($inventory) > 0) makeSets($sets, $inventory, $aCount, $bCount);
}
$sets = array();
makeSets($sets, $inventory, 1, 2);
print_r($sets);
Since you mentioned that you dont have that much experience with arrays, here are the links to the php documentation for the functions I used in the above code:
array_splice — Remove a portion of the array and replace it with something else
array_merge — Merge one or more arrays
array_pad — Pad array to the specified length with a value
This code sorts inventory without any assumption on inventory ordering. You can specify pattern (in $aPattern), and order is obeyed. It also fills lacking entries with given default value.
<?php
# config
$aInventory=array(
array("A","PINK"),
array("A","MAUVE"),
array("A","ORANGE"),
array("A","GREY"),
array("B","RED"),
array("B","BLUE"),
array("B","YELLOW"),
array("B","GREEN"),
array("B","BLACK"),
array("C","cRED"),
array("C","cBLUE"),
array("C","cYELLOW"),
array("C","cGREEN"),
array("C","cBLACK")
);
$aPattern = array('A','B','A','C');
$mDefault = null;
# preparation
$aCounter = array_count_values($aPattern);
$aCurrentCounter = $aCurrentIndex = array_fill_keys(array_unique($aPattern),0);
$aPositions = array();
$aFill = array();
foreach ($aPattern as $nPosition=>$sElement){
$aPositions[$sElement] = array_keys($aPattern, $sElement);
$aFill[$sElement] = array_fill_keys($aPositions[$sElement], $mDefault);
} // foreach
$nTotalLine = count ($aPattern);
$aResult = array();
# main loop
foreach ($aInventory as $aItem){
$sElement = $aItem[0];
$nNeed = $aCounter[$sElement];
$nHas = $aCurrentCounter[$sElement];
if ($nHas == $nNeed){
$aCurrentIndex[$sElement]++;
$aCurrentCounter[$sElement] = 1;
} else {
$aCurrentCounter[$sElement]++;
} // if
$nCurrentIndex = $aCurrentIndex[$sElement];
if (!isset($aResult[$nCurrentIndex])){
$aResult[$nCurrentIndex] = array();
} // if
$nCurrentPosition = $aPositions[$sElement][$aCurrentCounter[$sElement]-1];
$aResult[$nCurrentIndex][$nCurrentPosition] = $aItem;
} // foreach
foreach ($aResult as &$aLine){
if (count($aLine)<$nTotalLine){
foreach ($aPositions as $sElement=>$aElementPositions){
$nCurrentElements = count(array_keys($aLine,$sElement));
if ($aCounter[$sElement] != $nCurrentElements){
$aLine = $aLine + $aFill[$sElement];
} // if
} // foreach
} // if
ksort($aLine);
# add empty items here
} // foreach
# output
var_dump($aResult);
Generic solution that requires you to specify a pattern of the form
$pattern = array('A','B','B');
The output will be in
$result = array();
The code :
// Convert to associative array
$inv = array();
foreach($inventory as $item)
$inv[$item[0]][] = $item[1];
// Position counters : int -> int
$count = array_fill(0, count($pattern),0);
$out = 0; // Number of counters that are "out" == "too far"
// Progression
while($out < count($count))
{
$elem = array();
// Select and increment corresponding counter
foreach($pattern as $i => $pat)
{
$elem[] = $inv[ $pat ][ $count[$i]++ ];
if($count[$i] == count($inv[$pat]))
$out++;
}
$result[] = $elem;
}
Here is my dilemma and thank you in advance!
I am trying to create a variable variable or something of the sort for a dynamic associative array and having a hell of a time figuring out how to do this. I am creating a file explorer so I am using the directories as the keys in the array.
Example:
I need to get this so I can assign it values
$dir_list['root']['folder1']['folder2'] = value;
so I was thinking of doing something along these lines...
if ( $handle2 = #opendir( $theDir.'/'.$file ))
{
$tmp_dir_url = explode($theDir);
for ( $k = 1; $k < sizeof ( $tmp_dir_url ); $k++ )
{
$dir_list [ $dir_array [ sizeof ( $dir_array ) - 1 ] ][$tmp_dir_url[$k]]
}
this is where I get stuck, I need to dynamically append a new dimension to the array durring each iteration through the for loop...but i have NO CLUE how
I would use a recursive approach like this:
function read_dir_recursive( $dir ) {
$results = array( 'subdirs' => array(), 'files' => array() );
foreach( scandir( $dir ) as $item ) {
// skip . & ..
if ( preg_match( '/^\.\.?$/', $item ) )
continue;
$full = "$dir/$item";
if ( is_dir( $full ) )
$results['subdirs'][$item] = scan_dir_recursive( $full );
else
$results['files'][] = $item;
}
}
The code is untested as I have no PHP here to try it out.
Cheers,haggi
You can freely put an array into array cell, effectively adding 1 dimension for necessary directories only.
I.e.
$a['x'] = 'text';
$a['y'] = new array('q', 'w');
print($a['x']);
print($a['y']['q']);
How about this? This will stack array values into multiple dimensions.
$keys = array(
'year',
'make',
'model',
'submodel',
);
$array = array();
print_r(array_concatenate($array, $keys));
function array_concatenate($array, $keys){
if(count($keys) === 0){
return $array;
}
$key = array_shift($keys);
$array[$key] = array();
$array[$key] = array_concatenate($array[$key], $keys);
return $array;
}
In my case, I knew what i wanted $keys to contain. I used it to take the place of:
if(isset($array[$key0]) && isset($array[$key0][$key1] && isset($array[$key0][$key1][$key2])){
// do this
}
Cheers.