Online PHP editor | output for napru

@ 2019-04-13T07:41:49Z

<?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).)*'|(#|//).*|(/\*)(?s).*?\*/|(<!--)(?s).*?-->)~
PATTERN;

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

echo preg_replace_callback(PATTERN, function($m) {
        return "<span style=\"color:" . LOOKUP[$m[1]] . ";\">{$m[0]}</span>";
    }, $string);

Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0 - 8.5.1: //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  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 \\'
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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