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Use unset() function to remove array elements in a foreach loop. The unset() function is an inbuilt function in PHP which is used to unset a specified variable.
To remove element from array in forEach loop with JavaScript, we can use the array splice method. const review = ["a", "b", "c", "b", "a"]; review. forEach((item, index, arr) => { if (item === "a") { arr. splice(index, 1); } });
It is not recommended adding or removing elements from a list within a loop as an index of its elements, and the length of the list is changed. This might lead to the incorrect output, or java.
pop() function: This method is use to remove elements from the end of an array. shift() function: This method is use to remove elements from the start of an array. splice() function: This method is use to remove elements from the specific index of an array.
foreach($array as $elementKey => $element) {
foreach($element as $valueKey => $value) {
if($valueKey == 'id' && $value == 'searched_value'){
//delete this particular object from the $array
unset($array[$elementKey]);
}
}
}
You can also use references on foreach values:
foreach($array as $elementKey => &$element) {
// $element is the same than &$array[$elementKey]
if (isset($element['id']) and $element['id'] == 'searched_value') {
unset($element);
}
}
It looks like your syntax for unset is invalid, and the lack of reindexing might cause trouble in the future. See: the section on PHP arrays.
The correct syntax is shown above. Also keep in mind array-values for reindexing, so you don't ever index something you previously deleted.
Be careful with the main answer.
with
[['id'=>1,'cat'=>'vip']
,['id'=>2,'cat'=>'vip']
,['id'=>3,'cat'=>'normal']
and calling the function
foreach($array as $elementKey => $element) {
foreach($element as $valueKey => $value) {
if($valueKey == 'cat' && $value == 'vip'){
//delete this particular object from the $array
unset($array[$elementKey]);
}
}
}
it returns
[2=>['id'=>3,'cat'=>'normal']
instead of
[0=>['id'=>3,'cat'=>'normal']
It is because unset does not re-index the array.
It reindexes. (if we need it)
$result=[];
foreach($array as $elementKey => $element) {
foreach($element as $valueKey => $value) {
$found=false;
if($valueKey === 'cat' && $value === 'vip'){
$found=true;
$break;
}
if(!$found) {
$result[]=$element;
}
}
}
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