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" )); ?> |
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)); ?> |
Geeks NULL for NULL Geeks NULL
Reference: https://www.php.net/manual/en/arrayiterator.offsetunset.php