ext/standard/tests/filter: Add zlib dependency

And remove strange function to check if a filter is available

Author: Girgias

ext/standard/tests/filters/filter_errors.inc

@@ -1,16 +1,5 @@
 <?php
 
-function filter_errors_skipif($needle) {
-    if (!function_exists('fnmatch')) {
-        die('skip fnmatch() not available');
-    }
-    $filters = stream_get_filters();
-    foreach($filters as $filter) {
-        if (fnmatch($filter, $needle)) return;
-    }
-    die("skip $needle not available");
-}
-
 function filter_errors_test($filter, $data) {
 
     echo "test filtering of buffered data\n";

ext/standard/tests/filters/filter_errors_convert_base64_decode.phpt

@@ -1,7 +1,5 @@
 --TEST--
 Filter errors: convert.base64-decode
---SKIPIF--
-<?php require 'filter_errors.inc'; filter_errors_skipif('convert.base64-decode'); ?>
 --FILE--
 <?php
 require 'filter_errors.inc';

ext/standard/tests/filters/filter_errors_zlib_inflate.phpt

@@ -1,7 +1,7 @@
 --TEST--
 Filter errors: zlib.inflate
---SKIPIF--
-<?php require 'filter_errors.inc'; filter_errors_skipif('zlib.inflate'); ?>
+--EXTENSIONS--
+zlib
 --FILE--
 <?php
 require 'filter_errors.inc';

ext/standard/tests/filters/gh13264.phpt

@@ -1,7 +1,7 @@
 --TEST--
 GH-13264: fgets() and stream_get_line() do not return false on filter fatal error
---SKIPIF--
-<?php require 'filter_errors.inc'; filter_errors_skipif('zlib.inflate'); ?>
+--EXTENSIONS--
+zlib
 --FILE--
 <?php
 function create_stream()