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Converting Decimal Numbers to Binary in PHP with decbin()

This article explains how to use PHP's built‑in decbin() function to convert decimal integers into their binary string representation, covering the function syntax, parameter details, return limits, and providing a clear code example with expected output.

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Apr 23, 2021

Converting Decimal Numbers to Binary in PHP with decbin()

In everyday use we work with decimal numbers, while computers operate in binary; this article explains how to convert decimal to binary in PHP.

The built‑in decbin() function takes an integer $number and returns a string containing its binary representation, supporting values up to 4294967295 (32 bits).

Example usage:

&lt;?php
echo decbin(6) . "&lt;br&gt;";
echo decbin(4294967295) . "&lt;br&gt;";
?&gt;

The output will be:

110
11111111111111111111111111111111

Decimal conversion binary decbin

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