How to select with a binary field ? (php,mysql)

问题

Try to select use "where" clause in a mysql statement: e.g. Table: X with a ID column which is BINARY data type. Then save in a variable in php

$aid = $row["id"];

How do i use this variable later when I try to select from table

$where = "where `ID` = '$aid'";
$query = "SELECT * FROM X ".$where;

Return 0 row.

Does anyone know why?

回答1:

Answering my own question.

Just figured out:

$where = "where HEX(ID) = 'bin2hex($aid)'";
$query = "SELECT * FROM X ".$where;

Does anyone know better solution?

回答2:

Try below :

add BINARY in where clause.

$where = "where BINARY ID = '$aid'";
$query = "SELECT * FROM X ".$where;

来源：https://stackoverflow.com/questions/9799788/how-to-select-with-a-binary-field-php-mysql