Online PHP editor | rfc for OXc1r

@ 2017-07-02T23:32:46Z

<?php

class Validator {

  const GREATER = [self::class, 'greater'];
  const IS_TYPE = [self::class, 'isType'];

  public static function all(...$rules) {
    foreach ($rules as $def) {
      $rule = array_shift($def);
      if ($rule(...$def)) { continue; }
      return false;
    }
    return true;
  }

  public static function greater($value, $compare) : bool {
    return $value > $compare;
  }
  
  public static function isType($value, $type) : bool {
    return gettype($value) === $type;
  }
}

class Model {

  const RULES = [
    'foo' => [
      'integer',  // shorthand for [Validator::IS_TYPE, 'integer']
      [Validator::GREATER, 10]
    ]
  ];
  
  protected $foo;

  public function set($name, $value) {
    if ($this->isValid($name, $value)) {
      $this->$name = $value;
      return;
    }
    throw new Exception("{$name} cannot be {$value}");
  }

  function isValid() : bool {
    $rules = [];
    foreach (self::RULES[$name] as $rule) {
    
      // convenience: turn strings into typehints
      if (is_string($rule)) {
        $rules[] = [Validator::IS_TYPE, $value];
        continue;
      }
      
      // ... other convenience parsing ...
      
      // for fully defined rules, just add value arg at proper spot
      array_splice($rule, 1, 0, $value);
      $rules[] = $rule;
    }
    
    return Validator::ALL($rules);
  }
}

$m = new Model;

$m->set('foo', 15);
var_dump($m);

$m->set('foo', 7);

Output for git.master, git.master_jit, rfc.property-hooks: Warning: Undefined variable $name in /in/OXc1r on line 47 Warning: Undefined array key "" in /in/OXc1r on line 47 Warning: foreach() argument must be of type array|object, null given in /in/OXc1r on line 47 Fatal error: Uncaught Error: Value of type null is not callable in /in/OXc1r:11 Stack trace: #0 /in/OXc1r(62): Validator::all(Array) #1 /in/OXc1r(38): Model->isValid('foo', 15) #2 /in/OXc1r(68): Model->set('foo', 15) #3 {main} thrown in /in/OXc1r on line 11
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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