What's the prefix for binary in PHP?

Question

It\'s neither 0x nor 0; what is it? Is there?

Answer 1

From PHP 5.4+ there is, in fact, a prefix: 0b.

Current info in PHP Docs:

Binary integer literals are available since PHP 5.4.0.

To use octal notation, precede the number with a 0 (zero). To use hexadecimal notation precede the number with 0x. To use binary notation precede the number with 0b.

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Mar 24 '10 at 11:31 (original answer):

I don't think there is one. Prefix 0 if for octal and 0x is for hexadecimal.

From PHP docs:

Integer can be specified in decimal (base 10), hexadecimal (base 16), or octal (base 8) notation, optionally preceded by a sign (- or +).

To use octal notation, precede the number with a 0 (zero). To use hexadecimal notation precede the number with 0x.