PHP SplFixedArray valid() Function

The SplFixedArray::valid() function is an inbuilt function in PHP which is used to check the array can contain more elements or not.

Syntax:

bool SplFixedArray::valid()

Parameters: This function does not accept any parameter.

Return Value: This function returns true on success, false otherwise.

Below programs illustrate the SplFixedArray::valid() function in PHP:

Program 1:

<?php

// Create a fixed size array
$gfg = new SplFixedArray(3);

// Move to two step forward
$gfg->next();
$gfg->next();

// Print result
var_dump($gfg->valid());

$gfg->next();

// Print result
var_dump($gfg->valid());

$gfg->next();

// Print result
var_dump($gfg->valid());
?>

Output:

bool(true)
bool(false)
bool(false)

Program 2:

<?php

// Create some fixed size array
$gfg = new SplFixedArray(6);

$gfg[0] = 1;
$gfg[1] = 5;
$gfg[2] = 1;
$gfg[4] = 15;
$gfg[5] = 22;

// Iterate array and print values
while($gfg->valid()) {

    // Print current value of index of the array
    var_dump($gfg->valid());

    // Move next each time of iteration
    $gfg->next();
}
?>

Output:

bool(true)
bool(true)
bool(true)
bool(true)
bool(true)
bool(true)

Reference: https://www.php.net/manual/en/splfixedarray.valid.php