What is the difference between characters 23 and x23 in PHP?

[phpdevelopers]

What is the difference between characters 23 and x23 in PHP?

[ejsexton82]

"23" is a decimal number. "0x23" is a hexidecimal representation of the decimal number "35".

Code: Select all

echo "23: " . 23 . "<br/>";
echo "0x23: " . 0x23 . "<br/>";


These number also have corresponding UTF-8 characters. The "23" character is described as the End Transmission Block (ETB) character, which is "invisible" if you try to print it on screen. The "0x23" character, or "35" character, is the pound sign (#).

Code: Select all

echo "Character 23: &#23;<br/>";
echo "Character x23: &#x23; or &#35; <br/>";


I hope that helps. Good luck!