PHP dechex() – Convert Decimal Numbers to Hexadecimal Strings
The article explains PHP's dechex() function, detailing its purpose of converting a decimal integer to a hexadecimal string, describing the valid input range, parameter definition, return value, and providing example code with expected output.
The dechex() function in PHP returns a string containing the hexadecimal representation of a given decimal integer.
It can convert numbers up to PHP_INT_MAX * 2 + 1 (or -1); on a 32‑bit platform this maximum is 4294967295, which yields ffffffff as the result.
Parameter
int $number – the decimal value to be converted.
Return value
A string representing the hexadecimal form of $number .
Example
<?php
echo dechex(10)."\n"; // outputs: a
echo dechex(47); // outputs: 2f
?>Output
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