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@ 2021-11-14T18:05:35Z

<?php

$sentence = '[html style="font-size: 18px;" dir="ltr"][div style="font-size: 18px;" dir="ltr"][p style="font-weight: bold;"]Hello,[/p][p]You have got a new message from [a href="https://www.example.com/"]Example.com[/a][br][br].You could check your message on [a href="https://www.example.com/en/manager/inbox.html"]Manager[/a][/p][p][img src="https://www.example.com/assets/images/logo-default-120x50.png" width="120px" height="80px"][div style="color: #D4192D; font-weight: bold;"]Example.com Team[/div][/p][/div][/html]';

// proceed to the replacement of all self-closing tags first
$result = preg_replace('~\[ (br|hr|img)\b ([^]]*) ]~xi', '<$1$2/>', $sentence);


// then replace the innermost tags until there's nothing to replace
$count = 0;
do {
    $result = preg_replace('~
        \[ ( (\w+) [^]]* ) ]     # opening tag
        ( [^[]*+ )               # content without other bracketed tags
        \[/ \2 ]                 # closing tag
    ~xi', '<$1>$3</$2>', $result, -1, $count);
} while ($count);

echo $result;

Output for git.master, git.master_jit, rfc.property-hooks: <html style="font-size: 18px;" dir="ltr"><div style="font-size: 18px;" dir="ltr"><p style="font-weight: bold;">Hello,</p><p>You have got a new message from <a href="https://www.example.com/">Example.com</a><br/><br/>.You could check your message on <a href="https://www.example.com/en/manager/inbox.html">Manager</a></p><p><img src="https://www.example.com/assets/images/logo-default-120x50.png" width="120px" height="80px"/><div style="color: #D4192D; font-weight: bold;">Example.com Team</div></p></div></html>

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2022-12-01 RFC: Property hooks - included in PHP 8.4
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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