PHP | ArrayIterator offsetUnset() Function
Last Updated :
21 Nov, 2019
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The ArrayIterator::offsetUnset() function is an inbuilt function in PHP which is used to unset the value for an offset.
Syntax:
php
php
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($arrItr->offsetUnset("f"));
?>
<?php// Declare an ArrayIterator$arrItr = new ArrayIterator( array( "a" => 4, "b" => 2, "g" => 8, "d" => 6, "e" => 1, "f" => 9 ));// Display the offset valuevar_dump($arrItr->offsetGet("a")); // Unset the offset valuevar_dump($arrItr->offsetUnset("a")); // Display the offset valuevar_dump($arrItr->offsetGet("g")); // Unset the offset valuevar_dump($arrItr->offsetUnset("g"));// Display the offset valuevar_dump($arrItr->offsetGet("f")); // Unset the offset valuevar_dump($arrItr->offsetUnset("f"));?>
Output:
Program 2:
int(4) NULL int(8) NULL int(9) NULL
<?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));
?>
<?php // Declare an ArrayIterator$arrItr = new ArrayIterator( array( "for", "Geeks", "Science", "Geeks", "Portal", "Computer" )); // Print the value at index 1 echo $arrItr->offsetGet(1) . "\n"; // Unset the offset valuevar_dump($arrItr->offsetUnset(1)); // Print the value at index 0echo $arrItr->offsetGet(0) . "\n";// Unset the offset valuevar_dump($arrItr->offsetUnset(0));// Print the value at index 3echo $arrItr->offsetGet(3) . "\n"; // Unset the offset valuevar_dump($arrItr->offsetUnset(3));?>
Output:
Reference: https://www.php.net/manual/en/arrayiterator.offsetunset.php
Geeks NULL for NULL Geeks NULL
