Regular Expression For Special Characters & PHP Script For Get Special Characters Ranges

regex

[\x21-\x2F\x3A-\x40\x5B-\x60\x7B-\x7E]

script.php

<?php

$ranges = [
    ['21', '2F'],
    ['3A', '40'],
    ['5B', '60'],
    ['7B', '7E'],
];
$regexp_symbols = [];

foreach($ranges as $range) {
    $start = $range[0];
    $end = $range[1];
    $symbols_map = '\x' . $start . '-\x' . $end;
    echo $symbols_map . ': ';

    $start = hexdec($start);
    $end = hexdec($end);
    for ($i = $start; $i <= $end; $i++) {
        echo hex2bin(dechex($i));
    }
    echo PHP_EOL;

    $regexp_symbols[] = $symbols_map;
}

echo PHP_EOL . 'Regexp For Special Characters: [' . implode('', $regexp_symbols) . ']' . PHP_EOL;

➜  tests git:(master) ✗ php script.php
\x21-\x2F: !"#$%&'()*+,-./
\x3A-\x40: :;<=>?@
\x5B-\x60: [\]^_`
\x7B-\x7E: {|}~

Regexp For Special Characters: [\x21-\x2F\x3A-\x40\x5B-\x60\x7B-\x7E]