'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 == $b ( true )
If I use the === operator
'210010106140040100' === '210010106140040101' (comparison of strings: result is FALSE)
210010106140040100 === 210010106140040101 (comparison of numbers: result is TRUE)
I think it could be caused by the fact that the string is 'like' integer, but exceed the standard size of integer number.
But the final result remain a mistery for me: I've tested some others 'big' numbers and I've found for example:
18014398509481980==18014398509481981 (true) !!!!
18014398509481982==18014398509481981 (false) !!!!
In my specific script i can handle this specific comparison using the === operator, because i can assume that the variable are string.
But i'd like to know why this happen, and i'd appreciate suggestions about how to efficiently compare 'big' integers.
Thanks!
I use PHP 5.2 with IIS
No comments posted yet
Your Answer:
Login to answer
199
53
Other forums
how do i make a string??
hey guys,
can someone please tell me how to put data from the glob function into a string
file_put_contents and createimagefromjpeg
All,
I do somethings and then I have the following code:
file_put_contents('./test/'.$filename
Simple MySQL query...
Hello,
How could I do a mysql query that does this: SELECT * WHERE date/time < 5minutes ag
Problem writing URL into database
How would I write this into the database?
<?php echo "http://".$_SERVER['SER
Create multiple (n) arrays
Hi there,
I have the following need:
I have 2 arrays (coming from a databases)
Memory Allocation
Hi folks,
see this ex:
int v=5;
v=v+10;
then what will do the compiler before th
php wont update my db
hello,
sorry for posting in mysql forum but i dont know where exactly is the problem but here
help connecting a form to php and then emailing the form
Ok. So, I made a form, and I need help to where when submitted, I get an email with the submitted de
show the direct link into href
I want to display link on the page. i am fetching the data(URL) from database,actually before that i
need to apply an if/else statement to Tim Thumb script
Not sure how to work this. I essentially want to call a variety of image sizes based on which style