Generate a single-byte string from a number
Syntax
chr ( int $bytevalue ) : string
Parameters
bytevalueAn integer between 0 and 255.
Values outside the valid range (0..255) will be bitwise and'ed with 255, which is equivalent to the following algorithm:
while ($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); ?>
🐘
