PHP how to integer (int) transfer byte set (byte)?

1-> 01 00 00
255-> ff 00 00
256-> 00 01 00

PHP converts the left to the right?

Php
Jun.20,2022

$I = 123456;
$ar = unpack ("C *", pack ("L", $I));

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e5cd87-4cde9.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e5cd87-4cde9.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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