PHP MySQL PDO: how to preserve leading zeros of zerofill int columns

Question

I\'ve hit one more bump in the road of migrating from the old mysql_*() functions to the new PDO class: I have a the following table:

CREATE TABLE `         


        

Answer 1

you may use LPAD?

try this: SELECT *, LPAD( Id, 3, '0') AS zero_Fill_Id FROM test

should change 3 according to int size: maybe 4 for this situation?

Update:

I don't think change int to decimal to be good practice, why I'll not go deeper at this, you can search on that subject.

I think you use mysqlnd driver, what I've found about it (check if enabled How to know if MySQLnd is the active driver?):

Advantages of using mysqlnd for PDO

mysqlnd returns native data types when using Server-side Prepared Statements, for example an INT column is returned as an integer variable not as a string. That means fewer data conversions internally.

source: How to get numeric types from MySQL using PDO?

In this case there is PDO::ATTR_STRINGIFY_FETCHES which in your case should be set to true, also you can give try to PDO::ATTR_EMULATE_PREPARES attribute farther see: PDO MySQL: Use PDO::ATTR_EMULATE_PREPARES or not?

...
$pdo->setAttribute(PDO::ATTR_STRINGIFY_FETCHES, true);

Hope this helps in any case or anyone :))