I am trying to loop over certain array keys in drupal, but this is more of a generic php array question.
The array looks something like this...
$form['items'] = array(
#title => 'hello',
0 => array(
#subtitle => 'hello2';
),
1 => array(
#subtitle => 'hello2';
),
#prefix => '<div>hello</div>',
);
As you can see, the keys are a mix of numeric keys and #meta keys.
I am using this...
foreach($form['items'] as $x) {
unset($form['items'][$x]['column1']);
}
But i only want to target the numeric keys, I have tried is_numeric but it returned false.
Can someone tell me how to ignore the other keys? (Ignore #title and #prefix etc)
You want to check the keys, but you are using the value in your foreach. Do the following:
foreach($form['items'] as $key => $value) {
if (is_numeric($key))
unset($form['items'][$key]);
}
Hope I was helpful
Use is_int() rather than is_numberic()
foreach ($input_array as $key => $val) {
if (is_int($key)) {
// do stuff
}
}
Important to note that is_int only works on things that are type integer, meaning string representations are not allowed.
Related
I need to do "foreach" action only for the highest parent nodes in my PHP array.
In this example I would like to get echo of the family lastnames...
$families = array(
'Brooks' => array(
'John',
'Ilsa',
),
'Hilberts' => array(
'Peter',
'Heidy',
));
foreach($families as $family){
// do some action that will return only "Brooks,Hilbers"
// not "Brooks,John,Ilsa,Hilbers,Peter,Heidy,Brooks,John,Ilsa,Hilberts,Peter,Heidy"
}
Is is handable, or should I define the array differently? Thank you very much for any positive answer.
You can simply return the key of the array (which is the family name):
foreach($families as $key => $family){
echo "FAMILY NAME = ".$key;
}
You can use the foreach just like ($array as $value) or like ($array as $key => $value). When the array is indexed (numerical key) the $key returns the position of the index (0, 1, 2...). When the array is associative (named keys), the $key returns the name of the index (in your example, Brooks, Hilberts, ...)
For more information please see PHP Arrays and Foreach Manual
I need to remove an element form a deeply nested array of unknown structure (i.e. I do not know what the key sequence would be to address the element in order to unset it). The element I am removing however does have a consistent structure (stdObject), so I can search the entire multidimensional array to find it, but then it must be removed. Thoughts on how to accomplish this?
EDIT: This is the function I have right now trying to achieve this.
function _subqueue_filter_reference(&$where)
{
foreach ($where as $key => $value) {
if (is_array($value))
{
foreach ($value as $filter_key => $filter)
{
if (isset($filter['field']) && is_string($filter['field']) && $filter['field'] == 'nodequeue_nodes_node__nodequeue_subqueue.reference')
{
unset($value[$filter_key]);
return TRUE;
}
}
return _subqueue_filter_reference($value);
}
}
return FALSE;
}
EDIT #2: Snipped of array structure from var_dump.
array (size=1)
1 =>
array (size=3)
'conditions' =>
array (size=5)
0 =>
array (size=3)
...
1 =>
array (size=3)
...
2 =>
array (size=3)
...
3 =>
array (size=3)
...
4 =>
array (size=3)
...
'args' =>
array (size=0)
empty
'type' => string 'AND' (length=3)
...so assuming that this entire structure is assigned to $array, the element I need to remove is $array[1]['conditions'][4] where that target is an array with three fields:
field
value
operator
...all of which are string values.
This is just a cursor problem.
function recursive_unset(&$array)
{
foreach ($array as $key => &$value) # See the added & here.
{
if(is_array($value))
{
if(isset($value['field']) && $value['field'] == 'nodequeue_nodes_node__nodequeue_subqueue.reference')
{
unset($array[$key]);
}
recursive_unset($value);
}
}
}
Notes : you don't need to use is_string here, you can just make the comparison as you're comparing to a string and the value exists.
Don't use return unless you're sure there is only one occurrence of your value.
Edit :
Here is a complete example with an array similar to what you showed :
$test = array (
1 => array (
'conditions' =>
array (
0 => array ('field' => 'dont_care1', 'value' => 'test', 'operator' => 'whatever'),
1 => array ('field' => 'dont_care2', 'value' => 'test', 'operator' => 'whatever'),
2 => array ('field' => 'nodequeue_nodes_node__nodequeue_subqueue.reference', 'value' => 'test', 'operator' => 'whatever'),
3 => array ('field' => 'dont_care3', 'value' => 'test', 'operator' => 'whatever')
),
'args' => array (),
'type' => 'AND'
));
var_dump($test);
function recursive_unset(&$array)
{
foreach ($array as $key => &$value)
{
if(is_array($value))
{
if(isset($value['field']) && $value['field'] == 'nodequeue_nodes_node__nodequeue_subqueue.reference')
{
unset($array[$key]);
}
recursive_unset($value);
}
}
}
recursive_unset($test);
var_dump($test);
One way to solve this was to extend your recursive function with a second parameter:
function _subqueue_filter_reference(&$where, $keyPath = array())
You'd still do the initial call the same way, but the internal call to itself would be this:
return _subqueue_filter_reference($value, array_merge($keyPath, array($key)));
This would provide you with the full path of keys to reach the current part of the array in the $keyPath variable. You can then use this in your unset. If you're feeling really dirty, you might even use eval for this as a valid shortcut, since the source of the input you'd give it would be fully within your control.
Edit: On another note, it may not be a good idea to delete items from the array while you're looping over it. I'm not sure how a foreach compiles but if you get weird errors you may want to separate your finding logic from the deleting logic.
I have arrived at a solution that is a spin-off of the function found at http://www.php.net/manual/en/function.array-search.php#79535 (array_search documentation).
Code:
function _subqueue_filter_reference($haystack,&$tree=array(),$index="")
{
// dpm($haystack);
if (is_array($haystack))
{
$result = array();
if (count($tree)==0)
{
$tree = array() + $haystack;
}
foreach($haystack as $k=>$current)
{
if (is_array($current))
{
if (isset($current['field']) && is_string($current['field']) && $current['field'] == 'nodequeue_nodes_node__nodequeue_subqueue.reference')
{
eval("unset(\$tree{$index}[{$k}]);"); // unset all elements = empty array
}
_subqueue_filter_reference($current,$tree,$index."[$k]");
}
}
}
return $tree;
}
I hate having to use eval as it SCREAMS of a giant, gaping security hole, but it's pretty secure and the values being called in eval are generated explicitly by Drupal core and Views. I'm okay with using it for now.
Anyway, when I return the tree I simply replace the old array with the newly returned tree array. Works like a charm.
if i have the following array:
array(
'var1' => 123,
'var2' => 234,
'var3' => 345
);
I would like to extract specific parts of this to build a new array i.e. var1 and var3.
The result i would be looking for is:
array(
'var1' => 123,
'var3' => 345
);
The example posted is very stripped down, in reality the array has a much larger number of keys and I am looking to extract a larger number of key and also some keys may or may not be present.
Is there a built in php function to do this?
Edit:
The keys to be extracted will be hardcoded as an array in the class i..e $this->keysToExtract
$result = array_intersect_key($yourarray,array_flip(array('var1','var3')));
So, with your edit:
$result = array_intersect_key($yourarray,array_flip($this->keysToExtract));
You don't need a built in function to do this, try this :
$this->keysToExtract = array('var1', 'var3'); // The keys you wish to transfer to the new array
// For each record in your initial array
foreach ($firstArray as $key => $value)
{
// If the key (ex : 'var1') is part of the desired keys
if (in_array($key, $this->keysToExtract)
{
$finalArray[$key] = $value; // Add to the new array
}
}
var_dump($finalArray);
Note that this is most likely the most efficient way to do this.
Lets say I have an multidimensional string array:
.food = array(
'vegetable' => array(
'carrot' => 'blablue',
'potato' => 'bluebla',
'cauliflower' => 'blabla'
),
'Fruit' => array(
'apple' => 'chicken65',
'orange' => 'salsafood',
'pear' => 'lokkulakka'
)
);
is it possible to access the array by using index as numbers, instead of using the name of the key?
So for accessing chicken65 , I will type echo $food[1][0]; I don't want to use numbers as key, because its a big array and its more user-friendly if I use string as key and it will let me do for-loops on advanced level.
You can do foreach loops to achieve much the same thing as a typical for-loop.
foreach ($foods as $key => $value) {
//For the first iteration, $key will equal 'vegetable' and $value will be the array
}
$food[1][0] != $food[1]['apple'], so you cannot use numeric keys in this case.
try
$new_array = array_values($food);
however, variable can't start with .. It should start with $
you may want to try the function array_values but since you are dealing with multidemsional arrays, here is a solution posted by a php programmer
http://www.php.net/manual/en/function.array-values.php#103905
but it would be easier to use foreach instead of for.
You can use array_keys() on the array. The resulting array can be traversed via a for-loop and gives you the associative key.
I will show it to you for the first dimension:
$aTest = array('lol' => 'lolval', 'rofl' => 'roflval');
$aKeys = array_keys($aTest);
$iCnt = count($aKeys);
for($i = 0; $i < $iCnt; ++$i)
{
var_dump($aTest[$aKeys[$i]]);
}
You would need to do this for two dimensions but I would not recommend this. It is actually more obstrusive and slower than most other solutions.
I don't think there is something native to go this route.
And it does seem like you are trying to stretch array use a bit.
You should go OOP on this one.
Create a FoodFamilly object and a Food object in which you can store arrays if necessary and you'll be able to write a nice user-friendly code and add indices if needed.
OOP is almost always the answer :)
I have one array that contains some settings that looks like basically like this:
$defaults = array(
'variable' => 'value',
'thearray' => array(
'foo' => 'bar'
'myvar' => array('morevars' => 'morevalues');
);
);
On another file, i get a string with the first level key and it's childs to check if there is a value attached to it. Using the array above, i'd get something like this:
$option = "thearray['myvar']['morevars']";
I need to keep this string with a similar format to the above because I also need to pass it to another function that saves to a database and having it in an array's format comes in handy.
My question is, having the array and the string above, how can i check for both, existance and value of the given key inside the array? array_key_exists doesn't seem to work below the first level.
You could use a simple function to parse your key-string and examine the array like:
function array_deep_exists($array, $key)
{
$keys = preg_split("/'\\]|\\['/", $key, NULL, PREG_SPLIT_NO_EMPTY);
foreach ($keys as $key)
{
if ( ! array_key_exists($key, $array))
{
return false;
}
$array = $array[$key];
}
return true;
}
// Example usage
$defaults = array(
'variable' => 'value',
'thearray' => array(
'foo' => 'bar',
'myvar' => array('morevars' => 'morevalues')
)
);
$option = "thearray['myvar']['morevars']";
$exists = array_deep_exists($defaults, $option);
var_dump($exists); // bool(true)
Finally, to get the value (if it exists) return $array where the above returns true.
Note that if your array might contain false, then when returning the value you'll have to be careful to differentiate no-matching-value from a successful false value.
You need to eval this code, and use isset function in an eval string, and don't forget to add $ character in right place before code eval
example:
eval("echo isset(\$defaults['varname']['varname2']);")
this will echo 0 or 1 (false or true) You can do anything in eval, like a php source