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?
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Answer
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 />";
}