'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
File upload issues
Hi Guys,
Can anyone see any issues with this code:
Code: $setImage= 'productimages/' . dat
Creating XML with php
I need to creat an XML with php and have successfully produced a valid output.
The problem I hav
some query on multilingual website
Hi all,
Which is the simplest and easiest method to make a website multilingual,
is it put
sendmail code suddenly not working
Hi Guys, I maintain 3 sites (including my own) I use the following code from a french webmaster that
curl javascript problem
Hi Experts.
I'm new curl and wanna to get some info from this http://www.amadeus.net/
when
Backflush
I am looking for a report in SAP that would give me a list of all parts that are populated with a ba
PHP & MS Access - Line Break
Hey Guys!
I'm pulling records from an MS Access database and listing them using PHP and I'm r
Feed Maker
Hi all.
First of all I must say I am not a php developer so I am afraid I don't know much about i
Adding post count
How would I make it so everytime someone clicks submit on my form, their row in the database for the
IP Logger for Voting Script
Can anybody help me place an IP logger into my voting script?
I know that maybe it is not as secu