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Mimo, że strony WWW tworzymy już 5 lat zawsze znajdziemy coś ciekawego. Świadczy o tym chociażby nasza aktówka, w której znajduje się kilkadziesiąt porad, z których często korzystamy. Otwarta forma poradnika, czyli możliwość podrzucania tematów oraz wspólny ich rozwój, to nieoceniona pomoc. Uważam, ze abonament roczny jest niewspółmiernie niski do jakości zaprezentowanych materiałów.
Marek Kończal
Internetix.pl
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str_rot13 (PHP 4 >= 4.2.0, PHP 5) str_rot13 -- Perform the rot13 transform on a string Descriptionstring str_rot13 ( string str )
This function performs the ROT13 encoding on the
str argument and returns the resulting
string. The ROT13 encoding simply shifts every letter by 13
places in the alphabet while leaving non-alpha characters
untouched. Encoding and decoding are done by the same function,
passing an encoded string as argument will return the original version.
Przykład 1. str_rot13() example |
<?php
echo str_rot13('PHP 4.3.0'); ?>
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Notatka:
The behaviour of this function was buggy until PHP 4.3.0. Before
this, the str was also modified, as if
passed by reference.
User Contributed Notesnone at none dot com
12-Nov-2005 11:18
Own function rot 13:
function rot13($txt)
{
$char = range('a', 'z');
$flip = array_flip($char);
for( $i = 0; $i < strlen($txt); $i++ )
{
if ( !in_array($txt[$i], $char) )
{
$out .= $txt[$i];
}
else
{
$tmp = $flip[$txt[$i]];
if ( $tmp <= 12 )
$tmp = $tmp + 13;
else
$tmp = $tmp - 13;
$out .= $char[$tmp];
}
}
return $out;
}
Anonymous
11-Dec-2004 02:26
There is a workaround for the reference problem:
instead of:
<?php
$rot13 = str_rot13($str);
?>
do
<?php
$rot13 = str_rot13($str . "");
?>
In that case str_rot13() won't treat the value as a variable, but more as "hard-coded" (and won't pass the variable for reference)
joh at n dot liesen dot se
26-Nov-2004 05:35
It's also possible to rot13 a string without using a lookup table.
<?php
function rot13($s)
{
$rot13 = "";
for ($i = 0; $i < strlen($s); ++$i)
{
$char = ord($s{$i});
$cap = $char & 32;
$char &= ~$cap;
$char = (($char >= ord('A')) && ($char <= ord('z'))) ? (($char - ord('A') + 13) % 26 + ord('A')) : $char;
$char |= $cap;
$rot13 .= chr($char);
}
return $rot13;
}
?>
kristof_polleunis at yahoo dot com
15-Jul-2004 05:05
For versions of php <= 4.2.0 you can use:
function rot13($str){
if (!function_exists('str_rot13')) {
$from = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$to = 'nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM';
$rot13str = strtr($str, $from, $to);
}else{
$rot13str = str_rot13($str);
}
return $rot13str;
}
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