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‎.gitattributes

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# Auto detect text files and perform LF normalization
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* text=auto

‎LICENSE

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Apache License
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Version 2.0, January 2004
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http://www.apache.org/licenses/
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‎README.md

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# PHP Function Chaining
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Experimental PHP Function chaining, far from done. XDebug shows it's footprint is very small, so that's great.

‎chain.php

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<?php
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# Copyright (C) 2022 toxyy
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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class Chain
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{
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public function __construct(public &$data = NULL) {}
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public function __call($name, $args = NULL) {
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if(is_callable($name)) $this->data = $args ? $name(...$args) : $name($this->data);
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return $this;
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}
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public static function __callStatic($name, $args) { return (new static)->__call($name, $args); }
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public function __set($name, $value) { $this->data = $value; return $this; }
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public static function new(&$name = NULL, $value = NULL) {
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return ($self = new static)->__set($self->data = &$name, $value ?? $name);
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}
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public function __invoke($name = NULL, ...$args) {
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$this->data = $name;
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// getter
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if(is_null($name)) return $this->data;
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// closures and closures returning generators
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foreach([$name] + $args as $function)
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if(is_callable($function))
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if(($this->data = $function()) instanceof \Generator)
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$this->data = $this->data->next();
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return $this;
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}
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public function __get($name) { return $this; }
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public function __toString() { return $this->data; }
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public function print_r($args) {
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print_r($args);
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return $this;
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}
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public function print($args = NULL) {
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print $args ?: $this->data;
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return $this;
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}
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public function echo($args = NULL) {
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echo $args ?: $this->data;
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return $this;
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}
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}
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$chain = function(&$x, $y) { return Chain::new($x, $y); };
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// with internal aliases
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Chain::new($arr, range(1, 16))
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->array_map(fn($x) =>
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($x % 15 === 0) ? 'fizzbuzz'
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: (($x % 3 === 0) ? 'fizz'
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: (($x % 5 === 0) ? 'buzz'
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: $x)), $arr)
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(fn() => ['add_to_front'] + $arr)
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->implode()
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->print()
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->echo('<br>');
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// with calls
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Chain::new($arr, range(1, 16))
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(array_map(fn($x) =>
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($x % 15 === 0) ? 'fizzbuzz'
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: (($x % 3 === 0) ? 'fizz'
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: (($x % 5 === 0) ? 'buzz'
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: $x)), $arr))
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//(fn() => ['add_to_front'] + $arr)
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(implode($arr))
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(print($arr))
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->new($ar2, 123)
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(print($ar2))
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(print('<br>'));
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// string concatenation
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echo <<<HTML
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<br>
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This is a fizzbuzz chain:
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{$chain($arr, range(1, 16))
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->array_map(fn($x) =>
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($x % 15 === 0) ? 'fizzbuzz'
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: (($x % 3 === 0) ? 'fizz'
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: (($x % 5 === 0) ? 'buzz'
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: $x)), $arr)
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(fn() => ['add_to_front'] + $arr)
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->implode()}
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HTML;
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// function a($test) {
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// return $test += 1;
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// }
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// function b($test) {
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// return $test += 2;
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// }
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// Chain::new($c)->a(b())->print();
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// ->array_map(fn($x) => ($x % 5) ?: 'fizz', array_keys($arr));
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// echo $c . PHP_EOL; // 2
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// echo Chain::new($c)->a()->b() . PHP_EOL; // 5
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// (new Chain)->a()->b()->{$g = 6}->{(fn() => $g = 55)()}->data += 1;
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// echo $c . $d . PHP_EOL . $g;

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