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ord

Returns the ASCII value of the first character of string. This function complements chr(). Test ord online.

int ord ( string $string )

PHP Documentation by the PHP Documentation Group

ord

(PHP 4, PHP 5, PHP 7)

ordConvert the first byte of a string to a value between 0 and 255

Description

ord ( string $string ) : int

Interprets the binary value of the first byte of string as an unsigned integer between 0 and 255.

If the string is in a single-byte encoding, such as ASCII, ISO-8859, or Windows 1252, this is equivalent to returning the position of a character in the character set's mapping table. However, note that this function is not aware of any string encoding, and in particular will never identify a Unicode code point in a multi-byte encoding such as UTF-8 or UTF-16.

This function complements chr().

Parameters

string

A character.

Return Values

An integer between 0 and 255.

Examples

Example #1 ord() example

<?php
$str 
"\n";
if (
ord($str) == 10) {
    echo 
"The first character of \$str is a line feed.\n";
}
?>

Example #2 Examining the individual bytes of a UTF-8 string

<?php
declare(encoding='UTF-8');
$str "🐘";
for ( 
$pos=0$pos strlen($str); $pos ++ ) {
 
$byte substr($str$pos);
 echo 
'Byte ' $pos ' of $str has value ' ord($byte) . PHP_EOL;
}
?>

The above example will output:


Byte 0 of $str has value 240
Byte 1 of $str has value 159
Byte 2 of $str has value 144
Byte 3 of $str has value 152

See Also

PHP Documentation

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