Syntax of chr in PHP
string chr(int char)
Returns a string consisting of the single ASCII character char.
Example of chr in 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 */
/* Often this is more useful */
$str = sprintf("The string ends in escape: %c", 27);
?>
More Example of chr in PHP
<?php
echo chr(-159), chr(833), PHP_EOL;
?>