chr()

Published Oct 11, 2023
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The chr() function in PHP is used to convert an ASCII value into a single-character string.

Syntax

chr($ascii_value)

It accepts an ASCII value as the argument and returns a string representing the associated character.

The ASCII value can be specified in decimal, octal, or hex values.

  • Octal values are defined by a leading 0.
  • Hex values are defined by a leading 0x.

Example

The example below demonstrate the chr() function when different ASCII values are passed but their equivalent character is the same:

<?php
$decimal_ascii = 98; // Decimal format
$octal_ascii = 0142; // Octal format (starts with 0)
$hexadecimal_ascii = 0x62; // Hexadecimal format (starts with 0x)
// Using chr() function to convert ASCII values to characters
$char_decimal = chr($decimal_ascii);
$char_octal = chr($octal_ascii);
$char_hexadecimal = chr($hexadecimal_ascii);
// Output the results
echo "The equivalent character for ASCII 98 in decimal is $char_decimal\n";
echo "The equivalent character for ASCII 0142 in octal is $char_octal\n";
echo "The equivalent character for ASCII 0x62 in hex is $char_hexadecimal\n";
?>

This results in the following output:

The equivalent character for ASCII 98 in decimal is b
The equivalent character for ASCII 0142 in octal is b
The equivalent character for ASCII 0x62 in hex is b

Codebyte Example

The following code is runnable and demonstrates how to use the chr() function to convert multiple ASCII values into characters.

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