PHP dechex()函数

dechex() 是预定义的PHP数学函数，用于将十进制数转换为十六进制数。

语法

    string dechex ( int $number );

示例1

<?php
decimal=7;
echo "Your Decimal number is : ".decimal."<br>";   
echo "By using 'dechex()'function, your Hexadecimal number is :".dechex($decimal);
?>

输出:

Your Decimal number is : 7
By using 'dechex()'function, your Hexadecimal number is :7

示例2

<?php
decimal=10;
echo "Your Decimal number is : ".decimal."<br>";   
echo "By using 'dechex()'function, your Hexadecimal number is :".dechex($decimal);
?>

输出：

Your Decimal number is : 10
By using 'dechex()'function, your Hexadecimal number is :a

示例3

<?php
decimal=30;
echo "Your Decimal number is : ".decimal."<br>";   
echo "By using 'dechex()'function, your Hexadecimal number is :".dechex($decimal);
?>

输出：

Your Decimal number is : 30
By using 'dechex()'function, your Hexadecimal number is :1e

示例4

<?php
decimal=1587;
echo "Your Decimal number is : ".decimal."<br>";   
echo "By using 'dechex()'function, your Hexadecimal number is :".dechex($decimal);
?>

输出:

Your Decimal number is : 1587
By using 'dechex()'function, your Hexadecimal number is :633

示例5

<?php
decimal=70;
echo "Your Decimal number is : ".decimal."<br>";   
echo "By using 'dechex()'function, your Hexadecimal number is :".dechex($decimal);
?>

输出：

Your Decimal number is : 70
By using 'dechex()'function, your Hexadecimal number is :46

示例6

<?php
// The output below assumes a 32-bit platform.
// Note that the output is the same for all values.
echo dechex(-1)."\n";
echo dech ex(PHP_INT_MAX * 2 + 1)."\n";
echo dechex(pow(2, 32) - 1)."\n";
?>

输出：

ffffffff
ffffffff
ffffffff