PHP | ArrayIterator key() Function
The ArrayIterator::key() function is an inbuilt function in PHP which returns the current key of the array element.
Syntax:
mixed ArrayIterator::key( void )
Parameters: This function does not accept any parameters.
Return Value: This function returns the current array key.
Below programs illustrate the ArrayIterator::key() function in PHP:
Program 1:
<?php
$arrItr = new ArrayIterator(
array ( 'G' , 'e' , 'e' , 'k' , 's' , 'f' , 'o' , 'r' )
);
foreach ( $arrItr as $element ) {
echo $arrItr ->key() . "\n" ;
}
?>
|
Program 2:
<?php
$arrItr = new ArrayIterator(
array (
"a" => "Geeks" ,
"b" => "for" ,
"c" => "Geeks"
)
);
$arrItr ->append( "Computer" );
$arrItr ->append( "Science" );
$arrItr ->append( "Portal" );
foreach ( $arrItr as $element ) {
echo "key: " . $arrItr ->key() . " Value: "
. $arrItr ->current() . "\n" ;
}
?>
|
Output:
key: a Value: Geeks
key: b Value: for
key: c Value: Geeks
key: 0 Value: Computer
key: 1 Value: Science
key: 2 Value: Portal
Reference: https://www.php.net/manual/en/arrayiterator.key.php
Last Updated :
21 Nov, 2019
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