I have an array. I want to check its elements' values and change them if they are equal to 0 or 0.00
Here's what i tried and failed :
foreach($returnArray as $arrayElement){
if($arrayElement === 0 || $arrayElement === 0.00){
$arrayElement = null;
}
}
I wanna change 0 or 0.00 values into null value. $returnArray is my main array, it has some int and double values.
You could use array_map(), and just test each element for a falsey value (both 0 and 0.00 equate to false):
$returnArray = array_map(function($a) { return $a ?: null; }, $returnArray);
There is only one mistake, $arrayElement = null; has scope only within the loop. You need
foreach($returnArray as $key=>$arrayElement){
if($arrayElement == 0 ){
$returnArray[$key] = null; // This updates the actual array
}
}
This way you update the actual array elements which will stay that way even after the loop. Using the temporary variable within the loop will not have changes visible outside it.
PHP passes elements into foreach loops as copies. You can pass the actual element by refence like this:
foreach($returnArray as &$arrayElement){
if($arrayElement === 0 || $arrayElement === 0.00){
$arrayElement = null;
}
}
And with:
foreach($returnArray as $k => $arrayElement){
if($arrayElement <= 0){
$returnArray[$k] = null;
}
}
