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chunk_split> <chop
[edit] Last updated: Fri, 26 Apr 2013

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chr

(PHP 4, PHP 5)

chrReturn a specific character

Description

string chr ( int $ascii )

Returns a one-character string containing the character specified by ascii.

This function complements ord().

Parameters

ascii

The ascii code.

Return Values

Returns the specified character.

Examples

Example #1 chr() example

<?php
$str 
"The string ends in escape: ";
$str .= chr(27); /* add an escape character at the end of $str */

/* Often this is more useful */

$str sprintf("The string ends in escape: %c"27);
?>

See Also



chunk_split> <chop
[edit] Last updated: Fri, 26 Apr 2013
 
add a note add a note User Contributed Notes chr - [36 notes]
up
3
perrodin at laposte dot net
9 years ago
Note that if the number is higher than 256, it will return the number mod 256.
For example :
chr(321)=A because A=65(256)
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3
gschafer at robandger dot com
10 years ago
Here's a small function I wrote up to generate random passwords using the chr() function.

<?php
function randPass($len)
{
 
$pw = ''; //intialize to be blank
 
for($i=0;$i<$len;$i++)
 {
   switch(
rand(1,3))
   {
     case
1: $pw.=chr(rand(48,57));  break; //0-9
    
case 2: $pw.=chr(rand(65,90));  break; //A-Z
    
case 3: $pw.=chr(rand(97,122)); break; //a-z
  
}
 }
 return
$pw;
}
?>

Example:

<?php
 $password
= randPass(10); //assigns 10-character password
?>

I found this useful in my early coding days... I'm sure someone else will too :D
up
3
ddawsonNOSPAM at execpc dot com
12 years ago
[Editor's note:

%c is defined as: "Print the character belonging to the ascii code given"

chr() just gives a string, so you need to use %s, even if the string consists of only one character. This is consistent with other languages.
--Jeroen@php.net]


Learn from my mistake:
Do not expect this to work!

<?php
$c_question
= chr(63);
$v_out = sprintf("<%cphp\n", $c_question);
//... more stuff being sprintf'd into v_out here ...
$v_out = sprintf("%s%c>\n", $v_out, $c_question);
$v_fp = fopen("foofile", "w");
if (
$v_fp)
{
    
fwrite($v_fp, $v_out, strlen($v_out));
    
fclose($v_fp);
}
?>

When I did this, foofile contained <NUL NUL NUL NUL NUL>.
I spun my wheels quite awhile looking at fputs, fwrite to verify I was calling those functions correctly.
My mistake was using $c_question = chr(63) instead of
$c_question = 63 (correct).  Then everything worked fine.
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2
voromax
4 years ago
Another quick and short function to get unicode char by its code.

<?php
/**
 * Return unicode char by its code
 *
 * @param int $u
 * @return char
 */
function unichr($u) {
    return
mb_convert_encoding('&#' . intval($u) . ';', 'UTF-8', 'HTML-ENTITIES');
}
?>
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2
joeldegan AT yahoo.com
10 years ago
Want terminal colors in command line php scripts?

This should take care of that.
<?

$_colors = array(
        'LIGHT_RED'      => "[1;31m",
        'LIGHT_GREEN'     => "[1;32m",
        'YELLOW'     => "[1;33m",
        'LIGHT_BLUE'     => "[1;34m",
        'MAGENTA'     => "[1;35m",
        'LIGHT_CYAN'     => "[1;36m",
        'WHITE'     => "[1;37m",
        'NORMAL'     => "[0m",
        'BLACK'     => "[0;30m",
        'RED'         => "[0;31m",
        'GREEN'     => "[0;32m",
        'BROWN'     => "[0;33m",
        'BLUE'         => "[0;34m",
        'CYAN'         => "[0;36m",
        'BOLD'         => "[1m",
        'UNDERSCORE'     => "[4m",
        'REVERSE'     => "[7m",

);

function termcolored($text, $color="NORMAL", $back=1){
    global $_colors;
    $out = $_colors["$color"];
    if($out == ""){ $out = "[0m"; }
    if($back){
        return chr(27)."$out$text".chr(27).chr(27)."[0m".chr(27);
    }else{
        echo chr(27)."$out$text".chr(27).chr(27)."[0m".chr(27);
    }//fi
}// end function

echo termcolored("test\n", "BLUE");
?>
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1
darek at module17 dot com
1 month ago
Simple password generation function using sprintf and the %c type specifier; which is the same as chr().

function genPass($len = 8) {
    for ($i=0;$i<=$len;$i++) {
        $passwd = sprintf('%s%c', isset($passwd) ? $passwd : NULL, rand(48, 122));
    }
    return $passwd;
}
up
1
krkbpk at gmail dot com RamaKrishna Kothamasu
2 months ago
//simple example for chr() function
<?php
$i
=0;
for(
$i;$i<=255;$i++)
{
    echo
chr($i)."<br>";
}
?>
up
1
Kristin
10 years ago
Note that chr(10) is a 'line feed' and chr(13) is a 'carriage return' and they are not the same thing! I found this out while attempting to parse text from forms and text files for inclusion as HTML by replacing all the carriage returns with <BR>'s only to find after many head-scratchings that I should have been looking for line feeds. If anyone can shed some light on what the difference is, please do.

If you're planning on saving text from a form into a database for later display, you'll need to apply the following function so that it gets saved with the proper HTML tags.

<?php
$text
= str_replace ( chr(10), "<BR>", $text );
?>

When you want to plug it back into that form for editing you need to convert it back.

<?php
$text
= str_replace ( "<BR>", chr(10), $text)
?>

Hope this saves somebody some trouble. :)
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1
happyevil(at)1218.org
12 years ago
Here is a function that's help me find what chr(number) outputs what character quicker than typing out 256 echo tags.

<?php
 
function listChr(){
  for (
$i = 0; $i < 256; ++$i) {
  static
$genNum;
 
$genNum++;
  echo
"chr($genNum) will output '";
  echo (
chr($genNum));
  echo
"'< br>\n";
  }
}
listChr();
?>

Another helpful chr is #9, being a tab.  Quite using when making error logs.

 $tab = (chr(9));
 echo "<pre>error{$tab}date{$tab}time</pre>";

 -- HappyEvil
up
3
Emprivo.com
3 years ago
Replaces special characters with non-special equivalents

<?php
function normalize_special_characters( $str )
{
   
# Quotes cleanup
   
$str = ereg_replace( chr(ord("`")), "'", $str );        # `
   
$str = ereg_replace( chr(ord("´")), "'", $str );        # ´
   
$str = ereg_replace( chr(ord("„")), ",", $str );        # „
   
$str = ereg_replace( chr(ord("`")), "'", $str );        # `
   
$str = ereg_replace( chr(ord("´")), "'", $str );        # ´
   
$str = ereg_replace( chr(ord("“")), "\"", $str );        # “
   
$str = ereg_replace( chr(ord("”")), "\"", $str );        # ”
   
$str = ereg_replace( chr(ord("´")), "'", $str );        # ´

   
$unwanted_array = array(    'Š'=>'S', 'š'=>'s', 'Ž'=>'Z', 'ž'=>'z', 'À'=>'A', 'Á'=>'A', 'Â'=>'A', 'Ã'=>'A', 'Ä'=>'A', 'Å'=>'A', 'Æ'=>'A', 'Ç'=>'C', 'È'=>'E', 'É'=>'E',
                               
'Ê'=>'E', 'Ë'=>'E', 'Ì'=>'I', 'Í'=>'I', 'Î'=>'I', 'Ï'=>'I', 'Ñ'=>'N', 'Ò'=>'O', 'Ó'=>'O', 'Ô'=>'O', 'Õ'=>'O', 'Ö'=>'O', 'Ø'=>'O', 'Ù'=>'U',
                               
'Ú'=>'U', 'Û'=>'U', 'Ü'=>'U', 'Ý'=>'Y', 'Þ'=>'B', 'ß'=>'Ss', 'à'=>'a', 'á'=>'a', 'â'=>'a', 'ã'=>'a', 'ä'=>'a', 'å'=>'a', 'æ'=>'a', 'ç'=>'c',
                               
'è'=>'e', 'é'=>'e', 'ê'=>'e', 'ë'=>'e', 'ì'=>'i', 'í'=>'i', 'î'=>'i', 'ï'=>'i', 'ð'=>'o', 'ñ'=>'n', 'ò'=>'o', 'ó'=>'o', 'ô'=>'o', 'õ'=>'o',
                               
'ö'=>'o', 'ø'=>'o', 'ù'=>'u', 'ú'=>'u', 'û'=>'u', 'ý'=>'y', 'ý'=>'y', 'þ'=>'b', 'ÿ'=>'y' );
   
$str = strtr( $str, $unwanted_array );

   
# Bullets, dashes, and trademarks
   
$str = ereg_replace( chr(149), "&#8226;", $str );    # bullet •
   
$str = ereg_replace( chr(150), "&ndash;", $str );    # en dash
   
$str = ereg_replace( chr(151), "&mdash;", $str );    # em dash
   
$str = ereg_replace( chr(153), "&#8482;", $str );    # trademark
   
$str = ereg_replace( chr(169), "&copy;", $str );    # copyright mark
   
$str = ereg_replace( chr(174), "&reg;", $str );        # registration mark

   
return $str;
}
?>
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2
scott at quinlan dot co dot nz
4 years ago
Secure password generator with a variable maximum amount of symbols.

<?php

function passwdGen($minLength = 8, $maxLength = 12, $maxSymbols = 2)
{
   
$symbolCount = 0;

   
srand((double)microtime() * 1000003);

    for (
$i = 0; $i < rand($minLength, $maxLength); $i++)
    {
        do
        {
           
$char = rand(33, 126);

           
$symbolCount += $isSymbol = (!in_array($char, range(48, 57)) && !in_array($char, range(65, 90)) && !in_array($char, range(97, 122)));

            if (
$symbolCount <= $maxSymbols || !$isSymbol)
            {
                break;
            }
        }
        while (
true);

       
$passwd = sprintf('%s%c', isset($passwd) ? $passwd : NULL, $char);
    }

    return
$passwd;
}

?>
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0
sinfocol at sinfocol dot org
3 years ago
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";
    }
?>
up
0
Josh B.
4 years ago
In addition to replacing Microsoft Windows smart quotes, as sgaston demonstrated on 2006-02-13, I replace all other Microsoft Windows characters using suggestions[1] published by character code specialist[2] Jukka Korpela.

<?php
$str
= str_replace(chr(130), ',', $str);    // baseline single quote
$str = str_replace(chr(131), 'NLG', $str);  // florin
$str = str_replace(chr(132), '"', $str);    // baseline double quote
$str = str_replace(chr(133), '...', $str);  // ellipsis
$str = str_replace(chr(134), '**', $str);   // dagger (a second footnote)
$str = str_replace(chr(135), '***', $str);  // double dagger (a third footnote)
$str = str_replace(chr(136), '^', $str);    // circumflex accent
$str = str_replace(chr(137), 'o/oo', $str); // permile
$str = str_replace(chr(138), 'Sh', $str);   // S Hacek
$str = str_replace(chr(139), '<', $str);    // left single guillemet
$str = str_replace(chr(140), 'OE', $str);   // OE ligature
$str = str_replace(chr(145), "'", $str);    // left single quote
$str = str_replace(chr(146), "'", $str);    // right single quote
$str = str_replace(chr(147), '"', $str);    // left double quote
$str = str_replace(chr(148), '"', $str);    // right double quote
$str = str_replace(chr(149), '-', $str);    // bullet
$str = str_replace(chr(150), '-', $str);    // endash
$str = str_replace(chr(151), '--', $str);   // emdash
$str = str_replace(chr(152), '~', $str);    // tilde accent
$str = str_replace(chr(153), '(TM)', $str); // trademark ligature
$str = str_replace(chr(154), 'sh', $str);   // s Hacek
$str = str_replace(chr(155), '>', $str);    // right single guillemet
$str = str_replace(chr(156), 'oe', $str);   // oe ligature
$str = str_replace(chr(159), 'Y', $str);    // Y Dieresis
?>

[1] On the use of some MS Windows characters in HTML
http://www.cs.tut.fi/~jkorpela/www/windows-chars.html

[2] Unicode Explained by Jukka Korpela
http://www.amazon.com/dp/059610121X/
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-1
gjarrige at six-axe dot fr
1 year ago
to remove the ASCII control characters (except "line feed" and "tab") :

$tab_chr = array() ;
for($control = 0; $control < 32; $control++) {
    if ($control != 9 && $control != 10) {
        $tab_chr[]= chr($control) ;
    }
}
$tab_chr[]= chr(127) ;   
$string = str_replace($tab_chr, '', $string);
up
-1
admin at icstrategy dot midgetforhire dot com
7 years ago
I made a password generator with this function...

<?php
$passlength
= 8;
$pass = "";
$i = 0;
while(
$i <= $passlength)
    {
   
$pass .= chr(rand(33,126));
   
$i++;
    }
echo
$pass;
?>

Ofcourse you can change passlength.

Example of an 8-char password:
AFJ\)t'u}

I realise it isn't compatible for all sites, but most will accept :)
up
0
stanislav at nechutny dot net
1 year ago
There is simple function for converting number to chars. If you want make table like excel where colums are indetified by chars A,B,C...AA,AB.. you can easyli iterate on integer and call this function.
<?php
function numtochars($num,$start=65,$end=90)
{
   
$sig = ($num < 0);
   
$num = abs($num);
   
$str = "";
   
$cache = ($end-$start);
    while(
$num != 0)
    {
       
$str = chr(($num%$cache)+$start-1).$str;
       
$num = ($num-($num%$cache))/$cache;
    }
    if(
$sig)
    {
       
$str = "-".$str;
    }
    return
$str;
}
?>
up
0
darkodemon at gmail dot com
6 years ago
chr() with unicode support

<?php

function uchr ($codes) {
    if (
is_scalar($codes)) $codes= func_get_args();
   
$str= '';
    foreach (
$codes as $code) $str.= html_entity_decode('&#'.$code.';',ENT_NOQUOTES,'UTF-8');
    return
$str;
}

echo
uchr(23383); echo '<br/>';
echo
uchr(23383,215,23383); echo '<br/>';
echo
uchr(array(23383,215,23383,215,23383)); echo '<br/>';

?>
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0
JasonLauDotBiz
7 years ago
I didn't see it here, so here's simple random string generation using char.

<?php
for($i=0; $i<7; $i++){
   
$random_string .= chr(rand(0,25)+65);
}
echo
$random_string;
?>
up
0
grey - greywyvern - com
7 years ago
I spent hours looking for a function which would take a numeric HTML entity value and output the appropriate UTF-8 bytes.  I found this at another site and only had to modify it slightly; so I don't take credit for this.

<?php function unichr($dec) {
  if (
$dec < 128) {
   
$utf = chr($dec);
  } else if (
$dec < 2048) {
   
$utf = chr(192 + (($dec - ($dec % 64)) / 64));
   
$utf .= chr(128 + ($dec % 64));
  } else {
   
$utf = chr(224 + (($dec - ($dec % 4096)) / 4096));
   
$utf .= chr(128 + ((($dec % 4096) - ($dec % 64)) / 64));
   
$utf .= chr(128 + ($dec % 64));
  }
  return
$utf;
}
?>

So for example:

<?php

  $str
= "Chinese: &#20013;&#25991;";
 
$str = preg_replace("/&#(\d{2,5});/e", "unichr($1);", $str);

?>
up
0
sarabas at itstudio dot pl
8 years ago
The following function helped me to generate ascii-only usernames from firstname/lastname containing iso-8859-2 characters. The convertion array was based on contents of 'man iso-8859-2'.

Example: iso2ascii("b&#322;a&#380;ej.&#378;d&#378;b&#322;o") returns "blazej.zdzblo"

<?php
function iso2ascii($str) {
 
$arr=array(
 
chr(161)=>'A', chr(163)=>'L', chr(165)=>'L', chr(166)=>'S', chr(169)=>'S',
 
chr(170)=>'S', chr(171)=>'T', chr(172)=>'Z', chr(174)=>'Z', chr(175)=>'Z',
 
chr(177)=>'a', chr(179)=>'l', chr(181)=>'l', chr(182)=>'s', chr(185)=>'s',
 
chr(186)=>'s', chr(187)=>'t', chr(188)=>'z', chr(190)=>'z', chr(191)=>'z',
 
chr(192)=>'R', chr(193)=>'A', chr(194)=>'A', chr(195)=>'A', chr(196)=>'A',
 
chr(197)=>'L', chr(198)=>'C', chr(199)=>'C', chr(200)=>'C', chr(201)=>'E',
 
chr(202)=>'E', chr(203)=>'E', chr(204)=>'E', chr(205)=>'I', chr(206)=>'I',
 
chr(207)=>'D', chr(208)=>'D', chr(209)=>'N', chr(210)=>'N', chr(211)=>'O',
 
chr(212)=>'O', chr(213)=>'O', chr(214)=>'O', chr(216)=>'R', chr(217)=>'U',
 
chr(218)=>'U', chr(219)=>'U', chr(220)=>'U', chr(221)=>'Y', chr(222)=>'T',
 
chr(223)=>'s', chr(224)=>'r', chr(225)=>'a', chr(226)=>'a', chr(227)=>'a',
 
chr(228)=>'a', chr(229)=>'l', chr(230)=>'c', chr(231)=>'c', chr(232)=>'c',
 
chr(233)=>'e', chr(234)=>'e', chr(235)=>'e', chr(236)=>'e', chr(237)=>'i',
 
chr(238)=>'i', chr(239)=>'d', chr(240)=>'d', chr(241)=>'n', chr(242)=>'n',
 
chr(243)=>'o', chr(244)=>'o', chr(245)=>'o', chr(246)=>'o', chr(248)=>'r',
 
chr(249)=>'u', chr(250)=>'u', chr(251)=>'u', chr(252)=>'u', chr(253)=>'y',
 
chr(254)=>'t'
 
);
 return
strtr($str,$arr);
}
?>
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0
tenyou at gmail dot com
8 years ago
When having to deal with parsing an IIS4 or IIS5 metabase dump I wrote a simple function for converting those MS hexidecimal values into their ascii counter parts. Hopefully someone will find use for it.

<?php
function hex_decode($string)  {
        for (
$i=0; $i < strlen($string); $i)  {
       
$decoded .= chr(hexdec(substr($string,$i,2)));
       
$i = (float)($i)+2;
        }
return
$decoded;
}
?>
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0
jmartin at prescientsoftware dot com
9 years ago
Here is a function that will convert column numbers in to a letters for use in a spreadsheet.  It is limited up to 'ZZ' but can easliy by modifed.

<?php
 
function col2chr($a){
        if(
$a<27){
            return
strtoupper(chr($a+96));   
        }else{
            while(
$a > 26){
               
$b++;
               
$a = $a-26;               
            }                  
           
$b = strtoupper(chr($b+96));   
           
$a = strtoupper(chr($a+96));               
            return
$b.$a;
        }
    }
?>
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0
jgray at triangle dash solutions dot com
9 years ago
Lowercase alphabet:
<?php for($a=97;$a<(97+26);$a++){ echo chr($a); } ?>
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0
infoserv at chollian dot net
9 years ago
Cutting Korean(2Byte)-String

<?php
function cutStr($str,$len){
    if(
strlen($str) > $len){
       
$str = substr($str,0,$len - 2);
        if(
strlen(substr(strrchr($str," "),1)) % 2)
           
$str = substr($str,0,strlen($str) - 1);
       
$str .= "..";
    }
    return
$str;
}
?>
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0
webmaster at project-enigma dot net
11 years ago
\n == &#13;
Usefull if u want to display multi-line-alt-strings
e.g. <img src="/gifs/php_logo.gif" alt="Here u can see the&#13;PHPLogo&#13;3rd line">
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-1
mailderemi at gmail dot com
2 years ago
Here is a sample of encoding and decoding using "chr" and "ord".
<?php
   
function Encode($txtData,$Level){
        for (
$j = 0;$j<$Level;$j++){
           
$tmpStr = '';
            for (
$i = 0;$i<strlen($txtData);$i++)
               
$tmpStr .= ord(substr(strtoupper($txtData), $i, 1));
           
$txtData = $tmpStr;
        }
        return (
strlen($Level)).$Level.$txtData;
    }

    function
Decode($txtData){
       
$intLevel = substr($txtData, 1, substr($txtData, 0, 1));
       
$startStr = substr($txtData, substr($txtData, 0, 1)+1, strlen($txtData));
        for (
$j = 0;$j<$intLevel;$j++){
            for (
$i = 0;$i<strlen($startStr);$i+=2)
               
$tmpStr .= chr(intval(substr($startStr, $i, 2)));
           
$startStr = $tmpStr;
       
           
$tmpStr = "";
        }
        return
$startStr;
    }

echo
Encode('123',4).'<br>';
echo
Decode(Encode('123',5));
?>
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-1
Icar
3 years ago
Here is code for generation Russian alphabet:
<?php
for ($i=176;$i<=207;++$i) {
    echo
$i.'='.iconv('ISO-8859-5', 'UTF-8', chr($i)).'<br>';
}
?>
This simple code generates all Russian capital letters, but without 'Ё'.
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-1
glen at glencooper dot com
4 years ago
Thank you joeldegan for your termcolored function.  I write a lot of command-line scripts using PHP and like to colorize them.  I was having a problem with the termcolored function where the next character echo'ed after calling termcolored() was being dropped.  Turns out you don't need the extra chr(27) at the end of each term color code.

Here's my modified version of your function, renamed to echocolor.

<?php
function echocolor($text,$color="normal",$back=0)
{
 
$colors = array('light_red'  => "[1;31m", 'light_green' => "[1;32m", 'yellow'     => "[1;33m",
                 
'light_blue' => "[1;34m", 'magenta'     => "[1;35m", 'light_cyan' => "[1;36m",
                 
'white'      => "[1;37m", 'normal'      => "[0m",    'black'      => "[0;30m",
                 
'red'        => "[0;31m", 'green'       => "[0;32m", 'brown'      => "[0;33m",
                 
'blue'       => "[0;34m", 'cyan'        => "[0;36m", 'bold'       => "[1m",
                 
'underscore' => "[4m",    'reverse'     => "[7m" );
 
$out = $colors["$color"];
 
$ech = chr(27)."$out"."$text".chr(27)."[0m";
  if(
$back)
  {
    return
$ech;
  }
  else
  {
    echo
$ech;
  }
}
?>
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-1
markem at airmail dot net
4 years ago
First, the linefeed versus carriage return confusion:

When typewriters were first invented they were manually moved.  You could do a couple of things with them.  You could type on it (which would move the carriage one space to the left as you typed each character), you could hit the backspace key (which would move the carriage one space to the right), press the line feed button (which would cause the carriage to roll up one line), and return (which would move the carriage all the way to the right again).  When electric typewriters came in to being these functions were made into their electronic counterparts. When terminals appeared they were given the same functions just as word processors, text editors, and everything else that deals with the typed word handles them.

When computers first came out though, the dopey people who invented them wanted to distinguish themselves.  One of the ways they did that was to only use some of the commands.  Which is why the Macintosh originally only used the carriage return command and why Linux/Unix only used the line feed command.  This is why there is "\r" (carriage return), "\l" (Line Feed), and "\n" (OS appropriate).  One of the few things that IBM got right was that it should really be <Carriage Return><Line Feed> and not just one or the other.

So like the reason our roads are a certain width is because that was the width of two horses pulling a Roman chariot, the reason we use these terms is because of the humble non-electronic typewriter and how it worked.

Second - I believe that PHP actually generates ANSI characters and not ASCII characters.  Although there were different extended character sets for the ASCII characters (ie: 128-255), the one depicted on the http://www.asciitable.com/ website clearly shows the IBM standardized ASCII extended table.  (ie: If you ran a BASIC program on your computer you would see the set shown on the above website.)  If, however, you print out the characters via the CHR() function in PHP it prints out the ANSI character set.  (ASCII and ANSI are the same for 0-127.)  Although you can get the characters to print (via Unicode) through the CHR() function - this is still simply showing it is using ANSI and not ASCII.  (Because Unicode is an extension of the ANSI character set and not the ASCII character set.)

If this is so (and my tests show it is) - should the documentation be changed to reflect this?  :-?
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-1
mwgamera at gmail dot com
6 years ago
Unicode version of chr() using mbstring
<?php
 
function unichr($u) {
    return
mb_convert_encoding(pack("N",$u), mb_internal_encoding(), 'UCS-4BE');
  }
?>
It returns a string in internal encoding (possibly more than one byte).
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-1
sgaston at mercy corps dot ()rg
7 years ago
I found this function useful as a way to detect and to replace Microsoft Smart Quotes when desplaying info on a webpage.

The following lines seem to do the trick:

<?php
$text
= "string containing Microsoft Smart Quotes...";
$chrs = array (chr(150), chr(147), chr(148), chr(146));
$repl = array ("-", "\"", "\"", "'");
$text = str_replace($chrs, $repl, $text);
?>
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-1
Anonymous
7 years ago
If you want to increment your letter, which is stored as a string, you have to convert it back to an integer first.

<?php
    $letter
=strtolower($_GET['letter']);    //You wanted this originally, but not decided you want the previous letter
   
$letter=ord($letter);            //Convert to an integer
   
$letter=chr($letter-1);            //Convert back to a string, but the previous letter (naturally won't work with A or a)
?>
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-2
robin leffmann
1 year ago
While the documentation appears to imply ASCII character operation only, chr() can actually be used to convert arbitrary byte values into binary content:

<?php

while( @$i++ < 32 )
   
$a = chr( mt_rand(0, 255) );

file_put_contents( 'filename', $a );

?>
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-2
jacob at loggy punt nl
4 years ago
This function creates a ascii table, and replaces all the ascii characters in the mail.
---
Deze functie maakt een ascii tabel, en zet alles juist om.

<?php
 
function makeASCII($a){
 
$find[] = "=\r\n";
 
$replace[] = "";
 
  for(
$i=0; $i < 256; $i++){
   
$find[] = "=".dechex($i)."";
   
$replace[] = chr($i);
  }
 
$a = str_replace($find,$replace,$a);
  return
$a;
 }
?>
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-2
jcokos
10 years ago
A quick function that I use to make strings "XML" compliant, changing every special character into their #$... equivalent.

htmlentities doesn't get all of the chars above 127, so the second part of this (which I stole from one of the comments above) finishes the process, returning a nice, xml happy string.

<?php
   
function strictify ( $string ) {

       
$fixed = htmlentities( $string, ENT_QUOTES );

       
$trans_array = array();
        for (
$i=127; $i<255; $i++) {
          
$trans_array[chr($i)] = "&#" . $i . ";";
        }

       
$really_fixed = strtr($fixed, $trans_array);

        return
$really_fixed;

    }
?>

HTH
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plugwash at p10link dot net
7 years ago
bear in mind that php doesn't really care about character sets. php strings are just arbitary byte sequences thier meaning (especailly when you go beyond code 127) depends entirely on whats interpreting the data (in the case of a browser the charset specified in the http headers).

 
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