Online PHP editor | rfc for R1aql

@ 2023-07-17T12:46:27Z

<?php

function validateHtml($html) 
{
  $stack = array();
  $tags = preg_split("/(<[^>]+>)/", $html, -1, PREG_SPLIT_DELIM_CAPTURE);

  foreach ($tags as $tag) {
    if (preg_match("/^<\/\s*([^\s>]+)\s*>$/", $tag, $matches)) {
      // closing tag
      $last = array_pop($stack);
      if (!$last || $last !== $matches[1]) {
        return false;
      }
    } elseif (preg_match("/^<\s*([^\s>]+)(\s+[^>]+)?\s*>$/", $tag, $matches)) {
      // opening tag
      array_push($stack, $matches[1]);
    }
  }

  return count($stack) === 0;
}

// example usage
$html = "<div><p>Some text</p></div>";
var_dump(validateHtml($html)); // true

$html = "<div><p>Some text</div>";
var_dump(validateHtml($html)); // false

$html = "<div><p>Some text</p><span></span></div>";
var_dump(validateHtml($html)); // true

$html = "<div><p>Some text<span></p></span></div>";
var_dump(validateHtml($html)); // false

Output for git.master, git.master_jit, rfc.property-hooks: bool(true) bool(false) bool(true) bool(false)

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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