PHP | SplFixedArray valid() Function

Last Updated : 23 Aug, 2019

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 forword
$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

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