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<?php

// See http://www.unicode.org/versions/corrigendum1.html Table 3.1B. Legal UTF-8 Byte Sequences
$utf8 = "^([\\\x00-\\\x7F]|[\\\xC2-\\\xDF][\\\x80-\\\xBF]|\\\xE0[\\\xA0-\\\xBF][\\\x80-\\\xBF]|[\\\xE1-\\\xEF][\\\x80-\\\xBF][\\\x80-\\\xBF]|\\\xF0[\\\x90-\\\xBF][\\\x80-\\\xBF][\\\x80-\\\xBF]|[\\\xF1-\\\xF3][\\\x80-\\\xBF][\\\x80-\\\xBF][\\\x80-\\\xBF]|\\\xF4[\\\x80-\\\x8F][\\\x80-\\\xBF][\\\x80-\\\xBF])*$";

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1. Start with all methods from all used traits.
2. Resolve conflicting method names using "insteadof" rules.
   • Each trait offering a method may be excluded as the implementation of that method by being mentioned on the right hand side of the "insteadof" rules for the method.
   • A trait cannot be mentioned on the right hand side of the "insteadof" rules for a method more than once in total.
   • Of all the used traits which offer the method, either one or none must remain as the implemenation of the method. If none remain, the method does not exist after this step.
   • The trait name used on the left hand side of an "insteadof" rule has no meaning, but must be one of the used traits which offer the method and must not be mentioned on the right hand side of the same "insteadof" rule.
3. Add aliases.
   • Qualified aliases use the method implementation from the specified trait.
   • Unqualified aliases use the method implementation from the first used trait that offers it.

• The method visibility

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<?php

const PHP50 = 50000;
const PHP51 = 50100;
const PHP52 = 50200;
const PHP53 = 50300;
const PHP54 = 50400;
const PHP55 = 50500;
const PHP56 = 50600;
const PHP70 = 70000;

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JavaScript Objects, Classes, Functions and Prototypes

Objects

A JavaScript object is a map from keys (or "properties") to values, supporting the usual methods of a map/dictionary (set, get, delete, exists, iterate):

// set property
object.proprty = value;
object['property'] = value;

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The export of a module is effectively a single JavaScript value, usually an object with individual functions, classes, constants etc as properties. The exported value can be set with export = ... or individual things can be exported as properties of an object by putting export before its definition. For example, the following modules are equivelant:

export function foo() {}
export class Blah {}

export = {
 foo: function () {}

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<?php

/**
 * @param int $int
 * @param int $offset
 * @return bool
 */
function get_bit($int, $offset) {
    return (bool)((1 << $offset) & $int);
}

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My preferred code style is 2-space K&R. This is intended to provide a justification for this style.

Why K&R?

K&R style has the following properties:

1. Provides symmetric size (in terms of screen space consumed) between the opening and closing syntax of a clode block.
2. Forces no empty or meaningless lines, thereby avoiding artificial distance between related things that should be together.
3. Consumes the minimum vertical space while keeping the opening and closing syntax of a block on separate lines from the content.

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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="ProjectCodeStyleSettingsManager">
    <option name="PER_PROJECT_SETTINGS">
      <value>
        <PHPCodeStyleSettings>
          <option name="ALIGN_KEY_VALUE_PAIRS" value="true" />
          <option name="ALIGN_PHPDOC_PARAM_NAMES" value="true" />
          <option name="ALIGN_PHPDOC_COMMENTS" value="true" />
          <option name="ALIGN_ASSIGNMENTS" value="true" />

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<?php

class MemoryLimit {
    private $num = 0;

    function inc($num) {
        if (!$num)
            return;

        $this->num += $num;

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<?php

spl_autoload_register(function ($cls) {
    for ($cls = explode('\\', $cls); $cls; array_pop($cls)) {
        $sep = DIRECTORY_SEPARATOR;
        $php = __DIR__ . $sep . join($sep, $cls) . '.php';
        if (file_exists($php)) {
            /** @noinspection PhpIncludeInspection */
            require_once $php;
            break;