The ArrayIterator::ksort() function is an inbuilt function in PHP which is used to sort the array element by key.
Syntax:
void ArrayIterator::ksort( void )
Parameters: This function does not accept any parameters.
Return Value: This function does not return any value.
Below programs illustrate the ArrayIterator::ksort() function in PHP:
Program 1:
<?php // Declare an ArrayIterator $arrItr = new ArrayIterator( array( 5 => 'G', 4 => 'e', 3 => 'e', 2 => 'k', 1 => 's', 6 => 'f', 8 => 'o', 7 => 'r' ) ); // Sort the array element by key $arrItr->ksort(); // Display the element while($arrItr->valid()) { echo $arrItr->current() . " "; $arrItr->next(); } ?> |
Output:
s k e e G f r o
Program 2:
<?php // Declare an ArrayIterator $arrItr = new ArrayIterator( array( "a" => "Geeks", "c" => "for", "b" => "Geeks" ) ); // Append the element into array $arrItr->append("Computer"); $arrItr->append("Science"); $arrItr->append("Portal"); // Sort the array element by key $arrItr->ksort(); // Display the result foreach($arrItr as $element) { echo "key: " . $arrItr->key() . " Value: " . $arrItr->current() . "\n"; } ?> |
Output:
key: a Value: Geeks key: b Value: Geeks key: c Value: for key: 0 Value: Computer key: 1 Value: Science key: 2 Value: Portal
Reference: https://www.php.net/manual/en/arrayiterator.ksort.php
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