I want to create new object keys in foreach loop so I write:
$all_variants = $p->variants;
foreach ($all_variants as $a) {
$a->discount_price = $a->price;
$a->original_price = $a->price;
$a->button_text = 'BUY';
}
but this code wont create new keys (discount_price, original_price, button_text) ... $all_variants->discount_price is undefinded ....
Whats bad in my code?
You can use next trick for this
$all_variants = $p->variants;
foreach ($all_variants as &$a) {
$tmp = (array)$a;
$tmp['discount_price'] = $tmp['price'];
$tmp['original_price'] = $tmp['price'];
$tmp['button_text'] = 'BUY';
$a = (object)$tmp;
}
Here object converted to array modified and converted to object again
php code online test
This works for me:
foreach ($p->variants as $a) {
$a['discount_price'] = $a['price'];
$a['original_price'] = $a['price'];
$a->button_text = 'BUY';
$all_variants[] = $a;
}
You can modify the original array, but not the copy of the element you get in the loop...
foreach($p->variants as $i => $a) {
// $p->variants[ $i ] corresponds to $a
$p->variants[ $i ]['discount_price'] = $a['price'];
}
Related
I would like to shorten the result. I have used nummber_format but always an error appears.Can someone help me.
$arr = array();
foreach ($order->orderPositions as $tax) {
$arr[] = $tax->tax;
}
$unique_data = array_unique($arr);
foreach ($unique_data as $val) {
$totalTaxes[$val] = $order->orderPositions->where('tax',
$val)->sum('TotalPriceWithTax');
}
/*help is needed here*/ number_format((float)$unique_data,2);
Loop the array and save them as the new format either in a new array or the same
$unique_data = array_unique($arr);
foreach ($unique_data as &$val) { //notice the & if you want to change the data points in the unique array
$totalTaxes[$val] = $order->orderPositions->where('tax', $val)->sum('TotalPriceWithTax');
$val = number_format($val,2); // replaces the data in unique array
$new[] = number_format($val,2); // add to new array if you need unique array
}
How can I rename an object property without changing the order?
Example object:
$obj = new stdClass();
$obj->k1 = 'k1';
$obj->k2 = 'k2';
$obj->k3 = 'k3';
$obj->k4 = 'k4';
Example rename by creating new property:
$obj->replace = $obj->k3;
unset($obj->k3);
Result:
( k1=>k1, k2=>k2, k4=>k4, replace=>k3 )
See the problem?
Simply recreating the object property causes the order to change.
I had a similar issue with arrays and came up with this solution:
Implemented solution for arrays
function replaceKey(&$array, $find, $replace)
{
if(array_key_exists($find, $array)){
$keys = array_keys($array);
$i = 0;
$index = false;
foreach($array as $k => $v){
if($find === $k){
$index = $i;
break;
}
$i++;
}
if ($index !== false) {
$keys[$i] = $replace;
$array = array_combine($keys, $array);
}
}
}
Looking for something similar to this but a function that will work on objects.
Can't seem to find any documentation on object property position indexes.
So, readd your properties
$obj = new YourClass();
$backup = [];
foreach ($obj as $key => $value)
{
$backup[$key] = $value;
unset($obj->$key);
}
replaceKey($backup, $find, $replace);
foreach ($backup as $key => $value)
{
$obj->$key = $value;
}
Since you have a function for your arrays, why dont you do something like :
$array = (array) $obj;
$replacedKeyArray = replaceKey($array);
$newObject = (object) $replacedKeyArray;
This question already has answers here:
How does PHP 'foreach' actually work?
(7 answers)
Closed 8 years ago.
Consider the code below:
<?php
$arr = array();
$arr['b'] = 'book';
foreach($arr as $key=>$val) {
print "key=>$key\n";
if(!isset($arr['a']))
$arr['a'] = 'apple';
}
?>
It is not displaying 'a'. How foreach works with hash-table(array), to traverse each element. If lists are implement why can't I add more at run time ?
Please don't tell me that I could do this task with numeric based index with help of counting.
Foreach copies structure of array before looping(read more), so you cannot change structure of array and wait for new elements inside loop. You could use while instead of foreach.
$arr = array();
$arr['b'] = 'book';
reset($arr);
while ($val = current($arr))
{
print "key=".key($arr).PHP_EOL;
if (!isset($arr['a']))
$arr['a'] = 'apple';
next($arr);
}
Or use ArrayIterator with foreach, because ArrayIterator is not an array.
$arr = array();
$arr['b'] = 'book';
$array_iterator = new ArrayIterator($arr);
foreach($array_iterator as $key=>$val) {
print "key=>$key\n";
if(!isset($array_iterator['a']))
$array_iterator['a'] = 'apple';
}
I think you need to store array element continue sly
Try
<?php
$arr = array();
$arr['b'] = 'book';
foreach($arr as $key=>$val) {
print "key=>$key\n";
if(!isset($arr['a']))
$arr['a'][] = 'apple';
}
print_r($arr);
?>
In order to be able to directly modify array elements within the loop precede $value with &. In that case the value will be assigned by reference.
http://cz2.php.net/manual/en/control-structures.foreach.php
Try this:
You will get values.
<?php
$arr = array();
$arr['b'] = 'book';
foreach($arr as $key=>$val) {
print "key=>$key\n";
if(!isset($arr['a']))
$arr['a'] = 'apple';
}
echo '<pre>';
print_r($arr);
?>
Output:
key=>b
<pre>Array
(
[b] => book
[a] => apple
)
If you want to check key exist or not in array use array_key_exists function
Eg:
<?php
$arr = array();
$arr['b'] = 'book';
print_r($arr); // prints Array ( [b] => book )
if(!array_key_exists("a",$arr))
$arr['a'] = 'apple';
print_r($arr); // prints Array ( [b] => book [a] => apple )
?>
If you want to use isset condition try like this:
$arr = array();
$arr['b'] = 'book';
$flag = 0;
foreach($arr as $key=>$val) {
print "key=>$key\n";
if(!isset($arr["a"]))
{
$flag = 1;
}
}
if(flag)
{
$arr['a'] = 'apple';
}
print_r($arr);
How about using for and realtime array_keys()?
<?php
$arr = array();
$arr['b'] = 'book';
for ($x=0;$x<count($arr); $x++) {
$keys = array_keys($arr);
$key = $keys[$x];
print "key=>$key\n";
if(!isset($arr['a']))
$arr['a'] = 'apple';
}
I'm having some trouble understanding the coding in PHP, when it comes to multidimensional arrays and how to push.
The idea is to push a "Attribute" and a "Attribute value"
I have tried the formula below
$i = 0;
$array = array();
foreach($node as $a)
{
$strAtt = $node->PROP[$i]->attributes();
$strVal = $node->PROP[$i]->PVAL;
$output = $output.$strAtt." : ".$strVal."<BR>";
$array[] = ($strAtt => $strVal);
The $array[] = ($strAtt => $strVal); doesnt give me much success.
I have tried array_push($array, $strAtt => $strVal) - no luck..
As an extra questions, how do I loop trough the array and print me multidimensional values ?.
NEW CODE
while ($z->name === 'RECORD')
{
$node = new SimpleXMLElement($z->readOuterXML());
$Print = FALSE;
$output = "";
$i = 0;
foreach($node as $a)
{
$strAtt = $node->PROP[$i]->attributes();
$strVal = $node->PROP[$i]->PVAL;
$output = $output.$strAtt." : ".$strVal."<BR>";
$array[$strAtt] = $strVal;
if(($i == 6) && ($node->PROP[$i]->PVAL == $ProductLookup))
{
$Print = TRUE;
$Product = $node->PROP[$i]->PVAL;
}
$i++;
}
if($Print == TRUE) {
echo $output;
echo "Product : ".$Product."<br>";
var_dump($array);
}
//print_r($array);
$print = FALSE;
// go to next <product />
$z->next('RECORD');
}
New code added. For some reason my $array is totally empty when i dump it, although my $Output is full of text ?
It sounds like you are wanting an "associative" array and not necessarily a multi-dimensional array. For associative arrays you don't use array_push. Just do this:
$array[$strAtt] = $strVal;
Then to loop the array just do this:
foreach ($array as $key => $value) {
echo "$key = $value\n";
}
Go through array in php , you will understand how array works in php.
Besides if you want to add an element to a multidimensional array you can achieve like this :
$node = array ("key1"=> array (a,b) , "key2"=> array (c,d));
$array = array();
foreach ($node as $key=>$value) {
$array [$key] = $value;
}
This will be the resulting $array after the loop :
array (
"key1"=> array (
a,b
) ,
"key2"=>
array (c,d)
)
Hope that helps , happy coding :)
How to read the array below. For example i would like to set the 'actual_cash' to some other value. PLease help I am new to PhP.
$Cashups[0]['actual_cash'] = 50.22;
To change the first instance of actual_cash.
$Cashups[1]['actual_cash'] = 100.22;
To chance the second instance, and so on.
To loop through this array, you can do something like:
foreach($Cashups as &$c)
{
$c['actual_cash']=500.00;
}
Which would change al the actual_cash instances to 500.00
You can use foreach to iterate array
foreach($Cashups as $key => $value)
{
$value['actual_cash']='newval';
}
if you have only two items in array you could also do this
$Cashups[0]['actual_cash']='someval';
$Cashups[1]['actual_cash']='someval';
foreach($Cashups as $item){
$item['actual_cash'] = $mynewvalue;
}
using for loop:
for($i = 0; $i < count($Cashups); $i++) {
$Cashups[$i]['actual_cash'] = $yourValue;
}
using foreach loop:
foreach($Cashups as &$c) {
$c['actual_cash'] = $yourValue;
}
Try something like this
foreach($Cashups as &$cashup){
// referencing $cashup to change it's value
$cashup = 'new value';
}