PHP | filter_list() Function

PHP | stream_get_filters() Function

Last Updated : 11 Jul, 2025

The stream_get_filters() function is an inbuilt function in PHP which is used to get the list of registered stream filters. Syntax:

array stream_get_filters( void )

Parameters: This function does not accept any parameter. Return Value: This function returns an array containing the name of all available stream filters. Below programs illustrate the stream_get_filters() function in PHP: Program 1:

PHP

<?php

// PHP program to illustrate
// stream_get_filter function

$streamlist = stream_get_filters();
print_r($streamlist);
?>

Output:

Array
(
    [0] => zlib.*
    [1] => string.rot13
    [2] => string.toupper
    [3] => string.tolower
    [4] => string.strip_tags
    [5] => convert.*
    [6] => consumed
    [7] => dechunk
    [8] => convert.iconv.*
)

Program 2: Program to print number of filters return by function.

php

<?php

// PHP program to illustrate
// stream_get_filter function

$res = stream_get_filters();

$count = sizeof($res);

// Print result
echo "Total Available Filters = " . $count;
?>

Output:

Total Available Filters = 9

Reference: https://www.php.net/manual/en/function.stream-get-filters.php

PHP | filter_list() Function

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