Have an array for a ranking script.
Some times the key will be the same. They are numeric.
When the sort is ran, only non-like values are echoed.
Can't figure out the fix.
$list = array( $value1 => 'text', $value2 => 'text', $value3 => 'text');
krsort($list);
foreach ($list as $key => $frame) {
echo $frame;
}
If you assign two values to the same key in an array, the first value will be overridden by the second. You'll therefore end up with only one value for that key in the array.
To resolve this, I'd suggest to change your array structure like this:
<?php
$list = array( $key1 => array($key1member1, $key2member2),
$key2 => array($key2member1),
$key3 => array($key3member1, $key3member2, $key3member3) );
krsort($list);
foreach ($list as $key => $frames) {
foreach ($frames => $frame) {
echo $frame;
}
}
?>
Going by what you wrote in the comments to this question and my other answer, I'd recommend to switch keys and values.
<?php
$list = array( "frame1" => 4, "frame2" => 2, "frame3" => 99, "frame4" => 42 );
arsort($list);
foreach ($list as $frame => $ranking) {
echo $frame;
}
?>
Related
I have an array like:
$array = array(
'name' => 'Humphrey',
'email' => 'humphrey#wilkins.com
);
This is retrieved through a function that gets from the database. If there is more than one result retrieved, it looks like:
$array = array(
[0] => array(
'name' => 'Humphrey1',
'email' => 'humphrey1#wilkins.com'
),
[1] => array(
'name' => 'Humphrey2',
'email' => 'humphrey2#wilkins.com'
)
);
If the second is returned, I can do a simple foreach($array as $key => $person), but if there is only one result returned (the first example), I can't run a foreach on this as I need to access like: $person['name'] within the foreach loop.
Is there any way to make the one result believe its a multidimensional array?
Try this :
if(!is_array($array[0])) {
$new_array[] = $array;
$array = $new_array;
}
I would highly recommended making your data's structure the same regardless of how many elements are returned. It will help log terms and this will have to be done anywhere that function is called which seems like a waste.
You can check if a key exists and do some logic based on that condition.
if(array_key_exists("name", $array){
//There is one result
$array['name']; //...
} else {
//More then one
foreach($array as $k => $v){
//Do logic
}
}
You will have the keys in the first instance in the second yours keys would be the index.
Based on this, try:
function isAssoc(array $arr)
{
if (array() === $arr) return false;
return array_keys($arr) !== range(0, count($arr) - 1);
}
if(isAssoc($array)){
$array[] = $array;
}
First check if the array key 'name' exists in the given array.
If it does, then it isn't a multi-dimensional array.
Here's how you can make it multi-dimensional:
if(array_key_exists("name",$array))
{
$array = array($array);
}
Now you can loop through the array assuming it's a multidimensional array.
foreach($array as $key => $person)
{
$name = $person['name'];
echo $name;
}
The reason of this is probably because you use either fetch() or fetchAll() on your db. Anyway there are solutions that uses some tricks like:
$arr = !is_array($arr[0]) ? $arr : $arr[0];
or
is_array($arr[0]) && ($arr = $arr[0]);
but there is other option with array_walk_recursive()
$array = array(
array(
'name' => 'Humphrey1',
'email' => 'humphrey1#wilkins.com'
),
array(
'name' => 'Humphrey2',
'email' => 'humphrey2#wilkins.com'
)
);
$array2 = array(
'name' => 'Humphrey2',
'email' => 'humphrey2#wilkins.com'
);
$print = function ($item, $key) {
echo $key . $item .'<br>';
};
array_walk_recursive($array, $print);
array_walk_recursive($array2, $print);
I have this some arrays that look like this,
$array = Array(
'Homer' => Array
(
'id' => 222,
'size' => 12
),
'Bart' => Array
(
'id' => 333,
'size' => 3
)
);
I would like to echo Homer: id is 222, size is 12
then in the next line echo Bart: id is 333, size is 3 using a foreach loop as key and values.
So i basically want to echo all the Simpsons character names which have their id and size next their names.
I tired this but it printed homer too many times and it even used Bart's id and size at one point.
foreach( $array as $billdate => $date) {
foreach( $date as $k => $v) {
echo $billdate; // Prints Homer and bart
foreach($array as $innerArray){
foreach($innerArray as $key => $value){
echo "[". $key ."][". $value ."] <br/>";
}}
}
}
Thanks in advance.
you can try like this:
foreach( $array as $billdate => $date) {
echo $billdate.': id is '.$date['id'].', size is '.$date['size'];
}
Don't use so many foreach ,just think your need loop ...
foreach( $array as $billdate => $date) {
echo $billdate; // Prints Homer and bart
foreach($date as $key => $value){
echo "[". $key ."][". $value ."] <br/>";
}
}
$shortcodes['video_section'] = array(
'no_preview' => true,
'params' => 'xxx',
'shortcode' => '[sc1][/sc1]',
'popup_title' => __('Video Section', THEME_NAME),
'shortcode_icon' => __('li_video')
);
$shortcodes['image_section'] = array(
'no_preview' => true,
'params' => 'yyy',
'shortcode' => '[sc2][/sc2]',
'popup_title' => __('Image Section', THEME_NAME),
'shortcode_icon' => __('li_image')
);
$shortcodes[] = $th_shortcodes;
How can I retrieve the name of each array and then access to the key and value:
for example I need to loop throught $shortcode and get the array main name: 'image_section' 'video_section'
Then to retrieve the value of some key. I know how to retrieve key and value but really don't understand how to get the name of the declared array. If i do: var_dump($value); I saw the name of the array but how to access to it?
You can use foreach
foreach($shortcodes as $key => $value) {
echo $key // echoes "vide_section" and "image_section"
foreach($value as $innerKey => $innerValue) {
echo $innerKey // echoes 'no_preview', 'params', 'shortcode', 'popup_title', 'shortcode_icon' twice
}
}
Note that $value in this case refers to arrays, you can foreach again to access the inner values.
Use the array_flip function on the array
$array = array_flip($shortcodes);
Yes you can use foreach, where it goes through each item on array, based on creation order.
foreach($shortcodes as $key => $value) {
// $key represents video_section for 1st iteration and image_section for 2nd.
//Here each are array, so you can again iterate over $value and get each item .
foreach($value as $key2 => $value2) {
//here keys are no_preview, params and so on on subsequent iterations.
}
}
There's array_keys():
$keynames = array_keys($shortcodes);
You could foreach throught it:
foreach($shortcodes as $key=>values){ echo $key; }
or flip the values with the case (though this last one I don't recommend), and than foreach through those. But array flip is best to be left alone in this case (though I nice function to keep in the back of your head).
I have two arrays.
I have a foreach loop which is iterating through one of these arrays ($items). For each value in this array, if a condition is not true, I would like to unset that same key, but from another, similar array ($list). (The two arrays are not identical, but the key will always be the same).
I am unsure how to go about this. The code I used below did not successfully unset the record from the first array.
Both arrays do have keys (IDs), with secondary data.
$list = array(
'id' => '2',
'id' => '3',
'id' => '4',
'id' => '5',
'id' => '6'
);
$items = array(
'id' => '2',
'id' => '3',
'id' => '4',
'id' => '5',
'id' => '6'
);
foreach ($items AS $key => $item)
{
if ($item['id'] != $setting)
{
unset($list[$key]);
}
}
What exactly are the keys in the arrays? Because, you cannot have every key in an array be the same. They overwrite each other. (Not sure if this is just for your example or not).
Anyway, using this code works, with tests to verify...
<?php
$list = array(
2,3,4,5,6
);
$items = array(
2,3,4,5,6
);
$set = 3;
foreach($list as $key => $val){
echo $key . " " . $val . "\n";
}
echo "\n -------------------- \n";
foreach($list as $key => $val){
if ($list[$key] != $set){
unset($items[$key]);
}
}
foreach($items as $key => $val){
echo $key . " " . $val . "\n";
}
?>
So, the actual working code to do what you are attempting to do is this:
$list = array(
2,3,4,5,6
);
$items= array(
2,3,4,5,6
);
$set = 3; //random variable to mock your $setting variable
foreach($list as $key => $val){
if ($list[$key] != $set){
unset($items[$key]);
}
}
This loops through $items and for every value that does not equal $setting, remove from list.
$setting = 3;
$list = array('2','3','4','5','6');
$items = array('2','3','4','5','6');
foreach ($items AS $key => $item)
{
if ($item != $setting)
{
unset($list[$key]);
}
}
print_r($list);
Output:
Array ( [1] => 3 )
So $list now only contains the value 3.
In an array such as the one below, how could I rename "fee_id" to "id"?
Array
(
[0] => Array
(
[fee_id] => 15
[fee_amount] => 308.5
[year] => 2009
)
[1] => Array
(
[fee_id] => 14
[fee_amount] => 308.5
[year] => 2009
)
)
foreach ( $array as $k=>$v )
{
$array[$k] ['id'] = $array[$k] ['fee_id'];
unset($array[$k]['fee_id']);
}
This should work
You could use array_map() to do it.
$myarray = array_map(function($tag) {
return array(
'id' => $tag['fee_id'],
'fee_amount' => $tag['fee_amount'],
'year' => $tag['year']
); }, $myarray);
$arrayNum = count($theArray);
for( $i = 0 ; $i < $arrayNum ; $i++ )
{
$fee_id_value = $theArray[$i]['fee_id'];
unset($theArray[$i]['fee_id']);
$theArray[$i]['id'] = $fee_id_value;
}
This should work.
Copy the current 'fee_id' value to a new key named 'id' and unset the previous key?
foreach ($array as $arr)
{
$arr['id'] = $arr['fee_id'];
unset($arr['fee_id']);
}
There is no function builtin doing such thin afaik.
This is the working solution, i tested it.
foreach ($myArray as &$arr) {
$arr['id'] = $arr['fee_id'];
unset($arr['fee_id']);
}
The snippet below will rename an associative array key while preserving order (sometimes... we must). You can substitute the new key's $value if you need to wholly replace an item.
$old_key = "key_to_replace";
$new_key = "my_new_key";
$intermediate_array = array();
while (list($key, $value) = each($original_array)) {
if ($key == $old_key) {
$intermediate_array[$new_key] = $value;
}
else {
$intermediate_array[$key] = $value;
}
}
$original_array = $intermediate_array;
Converted 0->feild0, 1->field1,2->field2....
This is just one example in which i get comma separated value in string and convert it into multidimensional array and then using foreach loop i changed key value of array
<?php
$str = "abc,def,ghi,jkl,mno,pqr,stu
abc,def,ghi,jkl,mno,pqr,stu
abc,def,ghi,jkl,mno,pqr,stu
abc,def,ghi,jkl,mno,pqr,stu;
echo '<pre>';
$arr1 = explode("\n", $str); // this will create multidimensional array from upper string
//print_r($arr1);
foreach ($arr1 as $key => $value) {
$arr2[] = explode(",", $value);
foreach ($arr2 as $key1 => $value1) {
$i =0;
foreach ($value1 as $key2 => $value2) {
$key3 = 'field'.$i;
$i++;
$value1[$key3] = $value2;
unset($value1[$key2]);
}
}
$arr3[] = $value1;
}
print_r($arr3);
?>
I wrote a function to do it using objects or arrays (single or multidimensional) see at https://github.com/joaorito/php_RenameKeys.
Bellow is a simple example, you can use a json feature combine with replace to do it.
// Your original array (single or multi)
$original = array(
'DataHora' => date('YmdHis'),
'Produto' => 'Produto 1',
'Preco' => 10.00,
'Quant' => 2);
// Your map of key to change
$map = array(
'DataHora' => 'Date',
'Produto' => 'Product',
'Preco' => 'Price',
'Quant' => 'Amount');
$temp_array = json_encode($original);
foreach ($map AS $k=>$v) {
$temp_array = str_ireplace('"'.$k.'":','"'.$v.'":', $temp);
}
$new_array = json_decode($temp, $array);
Multidimentional array key can be changed dynamically by following function:
function change_key(array $arr, $keySetOrCallBack = [])
{
$newArr = [];
foreach ($arr as $k => $v) {
if (is_callable($keySetOrCallBack)) {
$key = call_user_func_array($keySetOrCallBack, [$k, $v]);
} else {
$key = $keySetOrCallBack[$k] ?? $k;
}
$newArr[$key] = is_array($v) ? array_change_key($v, $keySetOrCallBack) : $v;
}
return $newArr;
}
Sample Example:
$sampleArray = [
'hello' => 'world',
'nested' => ['hello' => 'John']
];
//Change by difined key set
$outputArray = change_key($sampleArray, ['hello' => 'hi']);
//Output Array: ['hi' => 'world', 'nested' => ['hi' => 'John']];
//Change by callback
$outputArray = change_key($sampleArray, function($key, $value) {
return ucwords(key);
});
//Output Array: ['Hello' => 'world', 'Nested' => ['Hello' => 'John']];
I have been trying to solve this issue for a couple hours using recursive functions, but finally I realized that we don't need recursion at all. Below is my approach.
$search = array('key1','key2','key3');
$replace = array('newkey1','newkey2','newkey3');
$resArray = str_replace($search,$replace,json_encode($array));
$res = json_decode($resArray);
On this way we can avoid loop and recursion.
Hope It helps.