bin2hex()

(PHP 4, PHP 5, PHP 7)

函数把包含数据的二进制字符串转换为十六进制值

说明

把二进制的参数$str转换为的十六进制的字符串。转换使用字节方式，高四位字节优先。

参数

二进制字符串。

返回值

返回指定字符串十六进制的表示。

参见

• hex2bin()转换十六进制字符串为二进制字符串
• pack()将数据打包成二进制字符串

This function is for converting binary data into a hexadecimal string representation. This function is not for converting strings representing binary digits into hexadecimal. If you want that functionality, you can simply do this:

This would output "f9". Just remember that there is a very big difference between binary data and a string representation of binary.

Postgresql return result in bytea so don't forget to convert_from