Generate a single-byte string from a number
Syntax
chr ( int $bytevalue ) : string
Parameters
bytevalue
An integer between 0 and 255.
Values outside the valid range (0..255) will be bitwise and'ed with 255, which is equivalent to the following algorithm:
while ($bytevalue < 0) { $bytevalue += 256; } $bytevalue %= 256;
Return
A single-character string containing the specified byte.
Examples
1
<? $bytevalue = 97; $return = chr($bytevalue); echo $return; ?>
a
2
<? $bytevalue = -159; $return = chr($bytevalue); echo $return; ?>
a
3
<? $bytevalue = 353; $return = chr($bytevalue); echo $return; ?>
a
4
<? for ($i = 0; $i <= 255; ++$i) { $ctype_print = ctype_print($i); if ($ctype_print) { $return = chr($i); echo $return; } } ?>
!"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
5
<? $bytevalue = 27; echo "escape: " . chr($bytevalue) . PHP_EOL; echo sprintf("escape: %c", $bytevalue); ?>
escape: escape:
6
<? echo chr(240) . chr(159) . chr(144) . chr(152); ?>
🐘