chr

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Generate a single-byte string from a number

chr ( int $bytevalue ) : string

bytevalue

An integer between 0 and 255.

Values outside the valid range (0..255) will be bitwise and'ed with 255, which is equivalent to the following algorithm:

while ($bytevalue < 0)
{
    $bytevalue += 256;
}

$bytevalue %= 256;

A single-character string containing the specified byte.

<? $bytevalue = 97; $return = chr($bytevalue); echo $return; ?>

a

<? $bytevalue = -159; $return = chr($bytevalue); echo $return; ?>

a

<? $bytevalue = 353; $return = chr($bytevalue); echo $return; ?>

a

<? for ($i = 0; $i <= 255; ++$i) { $ctype_print = ctype_print($i); if ($ctype_print) { $return = chr($i); echo $return; } } ?>

 !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~

<? $bytevalue = 27; echo "escape: " . chr($bytevalue) . PHP_EOL; echo sprintf("escape: %c", $bytevalue); ?>

escape: 
escape: 

<? echo chr(240) . chr(159) . chr(144) . chr(152); ?>

🐘

PHP