The ArrayIterator::offsetUnset() function is an inbuilt function in PHP which is used to unset the value for an offset.
Syntax:
void ArrayIterator::offsetUnset( mixed $index )
Parameters: This function accepts single parameter $index which holds the index to unset the offset.
Return Value: This function does not return any value.
Below programs illustrate the ArrayIterator::offsetUnset() function in PHP:
Program 1:
<?php // Declare an ArrayIterator $arrItr = new ArrayIterator( array( "a" => 4, "b" => 2, "g" => 8, "d" => 6, "e" => 1, "f" => 9 ) ); // Display the offset value var_dump($arrItr->offsetGet("a")); // Unset the offset value var_dump($arrItr->offsetUnset("a")); // Display the offset value var_dump($arrItr->offsetGet("g")); // Unset the offset value var_dump($arrItr->offsetUnset("g")); // Display the offset value var_dump($arrItr->offsetGet("f")); // Unset the offset value var_dump($arrItr->offsetUnset("f")); ?> |
Output:
int(4) NULL int(8) NULL int(9) NULL
Program 2:
<?php // Declare an ArrayIterator $arrItr = new ArrayIterator( array( "for", "Geeks", "Science", "Geeks", "Portal", "Computer" ) ); // Print the value at index 1 echo $arrItr->offsetGet(1) . "\n"; // Unset the offset value var_dump($arrItr->offsetUnset(1)); // Print the value at index 0 echo $arrItr->offsetGet(0) . "\n"; // Unset the offset value var_dump($arrItr->offsetUnset(0)); // Print the value at index 3 echo $arrItr->offsetGet(3) . "\n"; // Unset the offset value var_dump($arrItr->offsetUnset(3)); ?> |
Output:
Geeks NULL for NULL Geeks NULL
Reference: https://www.php.net/manual/en/arrayiterator.offsetunset.php
