The SplFixedArray::offsetExists() function is an inbuilt function in PHP which is used to check provided index exist or not in an array.
Syntax:
bool SplFixedArray::offsetExists( $index )
Parameters: This function accepts single parameter $index which specifies the requested index.
Return Value: This function returns true if requested index found otherwise return false.
Below programs illustrate the SplFixedArray::offsetExists() function in PHP:
Program 1:
<?php   // Create a fixed size array $gfg = new SplFixedArray(6);   $gfg[0] = 1; $gfg[1] = 5; $gfg[2] = 10;   // Check whether index exist or not var_dump($gfg->offsetExists(2)); ?> |
Output:
bool(true)
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;   $i = 0;   // Iterate array and print values while($i < 8) {       // Check whether index exist or not     var_dump($gfg->offsetExists($i));       $i++; } ?> |
Output:
bool(true) bool(true) bool(true) bool(true) bool(true) bool(true) bool(false) bool(false)
Reference: https://www.php.net/manual/en/splfixedarray.offsetexists.php
