note 91868 modified in function.chr by danbrown
| From: | danbrown@php.net | Date: | Tue, 30 Jun 2009 13:14:01 +0000 |
| Subject: | note 91868 modified in function.chr by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-157694@lists.php.net to get a copy of this message | ||
The function chr() also accepts negative numbers as an ascii code, so chr(-number) is equal to
chr((number%256)+256).
And for ascii code higher than 255 is chr(number%256)
We can test with a little script
<?php
for($i=-300; $i<300; $i++){
echo "Ascii $i\t" . ord(chr($i)) . "\n";
}
?>
--was--
The function chr() also accepts negative numbers as an ascii code, so chr(-number) is equal to
chr((number%256)+256).
And for ascii code higher than 255 is chr(number%256)
We can test with a little script
<?php
for($i=-300; $i<300; $i++){
echo "Ascii $i\t" . ord(chr($i)) . "\n";
}
http://php.net/manual/en/function.chr.php