PHP | SplFixedArray key() Function
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 positionecho $gfg->key() . "\n";?> |
Output:
2
Program 2:
<?php // Create some fixed size array$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 valueswhile($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
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