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PHP SplFixedArray () function

Syntax:
int SplFixedArray::key()
Parameters:this the function takes no parameters.Returned value:this function returns the key of the current index of the array.The programs below illustrate the function SplFixedArray::key ( )in PHP:Program 1:  
// Create a fixed size array $gfg = new SplFixedArray ( 6); $gfg [0] = 1; $gfg [1] = 5; $gfg [2] = 1; $gfg -> next(); $gfg -> next();  
// Print the current position key echo $gfg -> key(). "" ; ?>
Exit:
2
Program 2:  
// 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;  
// Loop through the array and display values ​​ while ( $gfg -> valid()) { // Print the key of each index echo $gfg -> key(). "" ; $gfg -> next(); }
?>
Exit:
0 1 2 3 4 5
Link: https://www.php .net / manual / en / splfixedarray.key.php

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