PHP | ArrayIterator valid() Function

PHP | ArrayIterator valid() Function

Last Updated : 21 Nov, 2019

The ArrayIterator::valid() function is an inbuilt function in PHP which is used to check whether an array contains more entries or not. Syntax:

bool ArrayIterator::valid( void )

Parameters: This function does not accept any parameters. Return Value: This function returns TRUE if the iterator is valid, FALSE otherwise. Below programs illustrate the ArrayIterator::valid() function in PHP: Program 1:

php

<?php

// Declare an ArrayIterator
$arrItr = new ArrayIterator(
    array('G', 'e', 'e', 'k', 's')
);

while ($arrItr->valid()) {
    echo "ArrayIterator Key: " . $arrItr->key() .
    "  ArrayIterator Value: " . $arrItr->current() . "\n";
    
    $arrItr->next();
}

?>

Output:

ArrayIterator Key: 0  ArrayIterator Value: G
ArrayIterator Key: 1  ArrayIterator Value: e
ArrayIterator Key: 2  ArrayIterator Value: e
ArrayIterator Key: 3  ArrayIterator Value: k
ArrayIterator Key: 4  ArrayIterator Value: s

Program 2:

php

<?php
   
// Declare an ArrayIterator
$arrItr = new ArrayIterator(
    array(
        "a" => "Geeks",
        "b" => "for",
        "c" => "Geeks"
    )
);

// Using rewind function 
$arrItr->rewind(); 
    
while($arrItr->valid()) { 
    var_dump($arrItr->current()); 
        
    // Moving to next element 
    $arrItr->next(); 
} 
   
?>

Output:

string(5) "Geeks"
string(3) "for"
string(5) "Geeks"

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

PHP | ArrayIterator valid() Function

jit_t

Improve

Article Tags :

Similar Reads

PHP | ArrayIterator rewind() Function

The ArrayIterator::rewind() function is an inbuilt function in PHP which is used to rewind the array back to the start. Syntax: void ArrayIterator::rewind( void ) Parameters: This function does not accept any parameters. Return Value: This function does not return any value. Below programs illustrat

PHP | ArrayIterator serialize() Function

The ArrayIterator::serialize() function is an inbuilt function in PHP which is used to serialize the array iterator. Syntax: string ArrayIterator::serialize( void ) Parameters: This function does not accept any parameters. Return Value: This function returns the serialized ArrayIterator. Below progr

PHP | DirectoryIterator valid() Function

The DirectoryIterator::valid() function is an inbuilt function in PHP which is used to check the current DirectoryIterator position is a valid file or not. Syntax: bool DirectoryIterator::valid( void ) Parameters: This function does not accept any parameters. Return Value: This function returns TRUE

PHP | AppendIterator valid() Function

The AppendIterator::valid() function is an inbuilt function in PHP which is used to check the validity of the current element. Syntax: bool AppendIterator::valid( void ) Parameters: This function does not accept any parameters. Return Value: This function returns TRUE if the current iteration is val

PHP | ArrayIterator seek() Function

The ArrayIterator::seek() function is an inbuilt function in PHP which is used to seek the position of an array iterator. Syntax: void ArrayIterator::seek( int $position ) Parameters: This function accepts single parameter $position which holds the position to seek. Return Value: This function does

PHP | ArrayIterator seek() Function

The ArrayIterator::seek() function is an inbuilt function in PHP which is used to seek the position of an array iterator. Syntax: void ArrayIterator::seek( int $position ) Parameters: This function accepts single parameter $position which holds the position to seek. Return Value: This function does

PHP | ArrayIterator unserialize() Function

The ArrayIterator::unserialize() function is an inbuilt function in PHP which is used to unserialize the serialize object. Syntax: void ArrayIterator::unserialize( string $serialized ) Parameters: This function accepts single parameter $serialized which holds the serialize array iterator object. Ret

PHP | ArrayIterator uasort() Function

The ArrayIterator::uasort() function is an inbuilt function in PHP which is used to sort the element using a user-defined comparison function and maintain their index association. Syntax: void ArrayIterator::uasort( callable $cmp_function ) Parameters: This function accepts a single parameter $cmp_f

PHP | ArrayIterator key() Function

The ArrayIterator::key() function is an inbuilt function in PHP which returns the current key of the array element. Syntax: mixed ArrayIterator::key( void ) Parameters: This function does not accept any parameters. Return Value: This function returns the current array key. Below programs illustrate

PHP | ArrayIterator next() Function

The ArrayIterator::next() function is an inbuilt function in PHP which is used to move the iterator to the next entry. Syntax: void ArrayIterator::next( void ) Parameters: This function does not accept any parameters. Return Value: This function does not return any value. Below programs illustrate t