The SplFixedArray::key() function is an inbuilt function in PHP which is used to get the key of the current index of the array.
Syntax:
int SplFixedArray::key()
Parameters: This function does not accept any parameter.
Return Value: This function returns the key of the current index of the array.
Below programs illustrate the SplFixedArray::key() function in PHP:
Program 1:
<?php // Create a fixed size array $gfg = new SplFixedArray(6);
$gfg [0] = 1;
$gfg [1] = 5;
$gfg [2] = 1;
$gfg ->next();
$gfg ->next();
// Print key of current position echo $gfg ->key() . "\n" ;
?> |
Output:
2
Program 2:
<?php // Create some fixed size array $gfg = new SplFixedArray(6);
$gfg [0] = 1;
$gfg [1] = 5;
$gfg [2] = 1;
$gfg [3] = 11;
$gfg [4] = 15;
$gfg [5] = 17;
// Iterate array and print values while ( $gfg ->valid()) {
// Print Key of each Index
echo $gfg ->key(). "\n" ;
$gfg ->next();
} ?> |
Output:
0 1 2 3 4 5
Reference: https://www.php.net/manual/en/splfixedarray.key.php