'210010106140040100' == '210010106140040101'
Posted on
16th Feb 2014 07:03 pm by
admin
Debugging this simple line of a PHP script
Code: if($a == $b){ }
I've found that with value of
Did you know?Explore Trending and Topic pages for more stories like this.
$a = '210010106140040100' (type = string)
$b = '210010106140040101' (type = string)
the result of the comparison is TRUE
the same if i compare 2 integer
$a = 210010106140040100 (type = int)
$b = 210010106140040101 (type = int)
$a == $b ( true )
If I use the === operator
'210010106140040100' === '210010106140040101' (comparison of strings: result is FALSE)
210010106140040100 === 210010106140040101 (comparison of numbers: result is TRUE)
I think it could be caused by the fact that the string is 'like' integer, but exceed the standard size of integer number.
But the final result remain a mistery for me: I've tested some others 'big' numbers and I've found for example:
18014398509481980==18014398509481981 (true) !!!!
18014398509481982==18014398509481981 (false) !!!!
In my specific script i can handle this specific comparison using the === operator, because i can assume that the variable are string.
But i'd like to know why this happen, and i'd appreciate suggestions about how to efficiently compare 'big' integers.
Thanks!
I use PHP 5.2 with IIS
No comments posted yet
Your Answer:
Login to answer
199
53
Other forums
formating when pulling data from a mysql database
Ok so Im not to sure if this is the right thread to post in but here is my catch 22 issue.
I
BAPI BBP_INB_DELIVERY_CREATE - material number missing in delivery
Hi Experts,
I was able to successfully create an Inbound delivery with reference to a PO
Sending UDP Raw socket
I truly need help on this. I am trying to write a test program that simulate a network environment
Image DPI
Hi.
I allow users to upload images, the user then is able to adjust several settings for the
Multi dimensional arrays
If I put in this code:
1
2
3
4
5
6
7
8
9
10
11
12
13<
Passing PHP variables from one page to another
Hello-
I'm having trouble figuring out how to transport a variable from one php file to anoth
Pagination
Hi All,
I think I'm finally getting somewhere with pagination!
I can now submit a quer
adding up might be solved tell us cheers.
i think i finally solved this anybody.
last time i was getting the wrong results.
Code
how to transport the Query and insfoset
Hi
I have created the query using SQ01........
How to created T-code for query..
Agency Business Process
Hi,
I don’t understand the process of the agency business in SAP.
In my