@ 2013-12-01T16:17:07Z <?php
function debugPrintFilter()
{
return function(\Traversable $input) {
foreach ($input as $in) {
var_dump($in);
yield $in;
}
};
}
function fooFilter()
{
return function(\Traversable $input) {
foreach ($input as $in) {
yield "foo";
}
};
}
function upperCaseStringFilter()
{
return function(\Traversable $input) {
foreach ($input as $in) {
yield strtoupper($in);
}
};
}
class FilterPipeline implements \IteratorAggregate {
protected $filters = [];
protected $src;
function __construct()
{
}
function src(\Traversable $it)
{
$this->src = $it;
return $this;
}
function pipe(callable $filter)
{
array_push($this->filters, $filter);
return $this;
}
function getIterator()
{
$it = $this->src;
foreach ($this->filters as $filter) {
$it = $filter($it);
}
return $it;
}
}
$p = (new FilterPipeline)
->src(new \ArrayIterator(["foo", "bar", "baz"]))
->pipe(upperCaseStringFilter())
->pipe(debugPrintFilter())
->pipe(fooFilter());
foreach ($p as $val) {
var_dump("Output", $val);
}
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Output for 8.1.0 - 8.1.27 , 8.2.0 - 8.2.18 , 8.3.0 - 8.3.6 Deprecated: Return type of FilterPipeline::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/XKWjd on line 51
string(3) "FOO"
string(6) "Output"
string(3) "foo"
string(3) "BAR"
string(6) "Output"
string(3) "foo"
string(3) "BAZ"
string(6) "Output"
string(3) "foo"
Output for 5.5.24 - 5.5.35 , 5.6.8 - 5.6.28 , 7.0.0 - 7.0.20 , 7.1.0 - 7.1.20 , 7.2.0 - 7.2.33 , 7.3.12 - 7.3.33 , 7.4.0 - 7.4.33 , 8.0.0 - 8.0.30 string(3) "FOO"
string(6) "Output"
string(3) "foo"
string(3) "BAR"
string(6) "Output"
string(3) "foo"
string(3) "BAZ"
string(6) "Output"
string(3) "foo"
Output for 5.4.0 - 5.4.45 Parse error: syntax error, unexpected '$in' (T_VARIABLE) in /in/XKWjd on line 8
Process exited with code 255 . Output for 5.3.0 - 5.3.29 Parse error: syntax error, unexpected T_VARIABLE in /in/XKWjd on line 8
Process exited with code 255 . Output for 4.4.2 - 4.4.9 , 5.1.0 - 5.1.6 , 5.2.0 - 5.2.17 Parse error: syntax error, unexpected T_FUNCTION in /in/XKWjd on line 5
Process exited with code 255 . Output for 4.3.0 - 4.3.1 , 4.3.5 - 4.3.11 , 4.4.0 - 4.4.1 , 5.0.0 - 5.0.5 Parse error: parse error, unexpected T_FUNCTION in /in/XKWjd on line 5
Process exited with code 255 . Output for 4.3.2 - 4.3.4 Parse error: parse error in /in/XKWjd on line 5
Process exited with code 255 . preferences:dark mode live preview
197.85 ms | 401 KiB | 313 Q