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chr

chr

Generate a single-byte string from a number

string **chr** int $codepoint

Returns a one-character string containing the character specified by interpreting as an unsigned integer. codepoint

This can be used to create a one-character string in a single-byte encoding such as ASCII, ISO-8859, or Windows 1252, by passing the position of a desired character in the encoding's mapping table. However, note that this function is not aware of any string encoding, and in particular cannot be passed a Unicode code point value to generate a string in a multibyte encoding like UTF-8 or UTF-16.

This function complements . ord

codepointAn 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:
   
  ```php

while ($bytevalue < 0) { $bytevalue += 256; } $bytevalue %= 256;






A single-character string containing the specified byte.


   
  **Voorbeeld:  example**

```php
<?php
// Assumes the string will be used as ASCII or an ASCII-compatible encoding

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

/* Often this is more useful */
$str = sprintf("The string ends in escape: %c", 27);
echo $str, PHP_EOL;
?>

Voorbeeld: Overflow behavior

<?php
echo chr(-159), chr(833), PHP_EOL;
?>

aA

Voorbeeld: Building a UTF-8 string from individual bytes

<?php
$str = chr(240) . chr(159) . chr(144) . chr(152);
echo $str, PHP_EOL;
?>

🐘

sprintf``%c``ordASCII-tablemb_chr``IntlChar::chr

Vorige ← chop Volgende chunk_split →

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