CODEWITHSUNDEEP
phpunicodecharacter-encodingbitnon-ascii-characters
Áron Pop Adorján
Áron Pop Adorján

Reputation: 453

PHP reversing a byte and printing it

I'm working with strings in PHP and the character 'a' in binary looks like this: 01100001.

What I want to do is reverse this, which then becomes 10000110 and convert back to its text representation, but everytime I try it either gives me a ? or a blank square indicating a non-printable or invalid character.

I tried online ASCII/UNICODE binary to text converters but they all give me nothing, why is that and how could I see what character does my byte decode to?

Upvotes: 0

Views: 101

Answers (1)

biesior
biesior

Reputation: 55798

10000110 is decimal 134 which means it's in the extended ASCII table (value over 127)

To be displayed properly it should be converted to cp1252

<?php
for ($i = 33; $i <= 255; $i++) {
    echo "$i: " . htmlentities(chr($i), ENT_QUOTES, 'cp1252') . "<br />";
}

See also here

Upvotes: 1

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