3v4l.org

run code in 300+ PHP versions simultaneously

@ 2019-04-12T22:48:11Z

<?php
$string = <<<'STRING'
//single line comment

random text ... #another comment

Multiline comments:

/* this is a multiline comment

with 'squote and "dquote"

matches the whole thing */

// single line 'squoted' "dquoted" comment w/ extra " for no reason

More comments <!-- yatta yatta
yatta
yatta -->

Quotes:

"also matches strings with \" escaped quotes or 'the other kind of quotation marks in it' "

a "nested 'squote with nested \"dquote\"'" assuming only outermost quoting matters for formatting

'matches the end quote because it it not escaped \\'
STRING;

const PATTERN = <<<'PATTERN'
~(?|(")(?:[^"\\]|\\(?s).)*"|(')(?:[^'\\]|\\(?s).)*'|(#|//).*|(/\*)(?:[^*/]|\*(?!/)|(?<!\*)/)*\*/|(<!--)(?:[^->]|-(?!->)|(?<!--)>)*-->)~
PATTERN;

const LOOKUP = [
    '#'    => 'gainsboro',
    '//'   => 'lightgrey',
    '/*'   => 'silver',
    '<!--' => 'darkgrey',
    "'"    => 'mint',
    '"'    => 'aqua'
];

echo preg_replace_callback(PATTERN, function($m) {
        $marker = $m[1];
        $encoded = addcslashes($marker, '"');
        $class = LOOKUP[$marker] ?? "missing $encoded";
        return "<span class=\"{$class}\" data-marker=\"{$encoded}\">{$m[0]}</span>";
    }, $string);

Output for git.master, git.master_jit, rfc.property-hooks: <span class="lightgrey" data-marker="//">//single line comment</span> random text ... <span class="gainsboro" data-marker="#">#another comment</span> Multiline comments: <span class="silver" data-marker="/*">/* this is a multiline comment with 'squote and "dquote" matches the whole thing */</span> <span class="lightgrey" data-marker="//">// single line 'squoted' "dquoted" comment w/ extra " for no reason</span> More comments <span class="darkgrey" data-marker="</span> Quotes: <span class="aqua" data-marker="\"">"also matches strings with \" escaped quotes or 'the other kind of quotation marks in it' "</span> a <span class="aqua" data-marker="\"">"nested 'squote with nested \"dquote\"'"</span> assuming only outermost quoting matters for formatting <span class="mint" data-marker="'">'matches the end quote because it it not escaped \\'</span>

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

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

preferences:dark modelive previewkey bindings

120.57 ms | 408 KiB | 5 Q