bindec() function in PHP

The bindec() function converts a binary number to its decimal equivalent. It takes a binary string as input and returns the corresponding decimal value.

Syntax

bindec(binary_string)

Parameters

• binary_string − The binary string to convert. Must contain only 0s and 1s.

Return Value

The bindec() function returns the decimal value of the specified binary string. If the input contains invalid characters, it stops processing at the first invalid character.

Examples

Basic Conversion

Here's a simple example converting binary to decimal ?

<?php
    echo bindec("1101");
?>

13

Multiple Conversions

Converting different binary numbers ?

<?php
    echo "Binary 1010 = " . bindec("1010") . "<br>";
    echo "Binary 11111111 = " . bindec("11111111") . "<br>";
    echo "Binary 1 = " . bindec("1") . "<br>";
    echo "Binary 0 = " . bindec("0");
?>

Binary 1010 = 10
Binary 11111111 = 255
Binary 1 = 1
Binary 0 = 0

Invalid Input Handling

When invalid characters are encountered, processing stops at that point ?

<?php
    echo bindec("1012") . "<br>";  // Stops at '2'
    echo bindec("101abc") . "<br>"; // Stops at 'a'
    echo bindec("xyz");           // No valid binary digits
?>

5
5
0

Conclusion

The bindec() function is useful for converting binary representations to decimal numbers. It processes valid binary digits until it encounters an invalid character or reaches the end of the string.