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English
The PHP bindec() function accepts a string parameter, which must be in valid binary format, consisting only of 0 and 1 characters. The example is as follows:
<?php
echo bindec("1011"); // Output 11
?>
In this example, "1011" is a standard binary representation, which results in the decimal 11.
The answer is: No, it will not affect the result.
The bindec() function will ignore leading 0s and calculate the weight of each bit from right to left as usual. For example:
<?php
echo bindec("0001011"); // Still outputs 11
?>
Even if you pass "0001011", PHP will parse it as "1011" internally, and the result will remain unchanged.
This means that when using bindec(), you do not need to manually write code to remove leading zeros.
Suppose you are building a system to extract decimal numbers from binary data submitted by users. The URL might look like this:
https://m66.net/convert.php?bin=00011001
You can handle it as follows:
<?php
$binary = $_GET['bin'] ?? '0';
$decimal = bindec($binary);
echo "The decimal result is: $decimal";
?>
Even if the user submits "00011001", the output will still be the correct decimal 25. No extra ltrim($binary, '0') operation is needed.
Although bindec() is not sensitive to leading zeros, there are still a few points to keep in mind:
Make sure the string passed in contains only 0 and 1. Other characters will cause errors in the calculation or unexpected output.
If the user inputs an empty string (""), bindec() will return 0. You may need additional input validation to prevent this situation.
