PHP: Remove object from array

In PHP, you can remove objects from an array using the unset() function. This function removes an element at a specific index and preserves the remaining array keys.

Using unset() to Remove by Index

The simplest way to remove an object from an array is by specifying its index directly −

<?php
$index = 2;
$objectarray = array(
    0 => array('label' => 'abc', 'value' => 'n23'),
    1 => array('label' => 'def', 'value' => '2n13'),
    2 => array('label' => 'abcdef', 'value' => 'n214'),
    3 => array('label' => 'defabc', 'value' => '03n2')
);

echo "Before removal:
";
var_dump($objectarray);

unset($objectarray[$index]);

echo "\nAfter removal:
";
var_dump($objectarray);
?>

Before removal:
array(4) {
  [0]=>
  array(2) {
    ["label"]=>
    string(3) "abc"
    ["value"]=>
    string(3) "n23"
  }
  [1]=>
  array(2) {
    ["label"]=>
    string(3) "def"
    ["value"]=>
    string(4) "2n13"
  }
  [2]=>
  array(2) {
    ["label"]=>
    string(6) "abcdef"
    ["value"]=>
    string(4) "n214"
  }
  [3]=>
  array(2) {
    ["label"]=>
    string(6) "defabc"
    ["value"]=>
    string(4) "03n2"
  }
}

After removal:
array(3) {
  [0]=>
  array(2) {
    ["label"]=>
    string(3) "abc"
    ["value"]=>
    string(3) "n23"
  }
  [1]=>
  array(2) {
    ["label"]=>
    string(3) "def"
    ["value"]=>
    string(4) "2n13"
  }
  [3]=>
  array(2) {
    ["label"]=>
    string(6) "defabc"
    ["value"]=>
    string(4) "03n2"
  }
}

Remove by Condition

You can also remove objects based on specific conditions using a foreach loop −

<?php
$objectarray = array(
    0 => array('label' => 'abc', 'value' => 'n23'),
    1 => array('label' => 'def', 'value' => '2n13'),
    2 => array('label' => 'abcdef', 'value' => 'n214')
);

// Remove object where label is 'def'
foreach ($objectarray as $key => $object) {
    if ($object['label'] == 'def') {
        unset($objectarray[$key]);
    }
}

var_dump($objectarray);
?>

array(2) {
  [0]=>
  array(2) {
    ["label"]=>
    string(3) "abc"
    ["value"]=>
    string(3) "n23"
  }
  [2]=>
  array(2) {
    ["label"]=>
    string(6) "abcdef"
    ["value"]=>
    string(4) "n214"
  }
}

Key Points

When using unset() on array elements:

• Original array keys are preserved (gaps may appear in numeric indices)
• Use array_values() to reindex the array if needed
• Multiple elements can be removed in a single operation

Conclusion

The unset() function is the most efficient way to remove objects from arrays in PHP. Use direct index removal for known positions or combine with loops for conditional removal based on object properties.