'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 == $b ( true )
If I use the === operator
'210010106140040100' === '210010106140040101' (comparison of strings: result is FALSE)
210010106140040100 === 210010106140040101 (comparison of numbers: result is TRUE)
I think it could be caused by the fact that the string is 'like' integer, but exceed the standard size of integer number.
But the final result remain a mistery for me: I've tested some others 'big' numbers and I've found for example:
18014398509481980==18014398509481981 (true) !!!!
18014398509481982==18014398509481981 (false) !!!!
In my specific script i can handle this specific comparison using the === operator, because i can assume that the variable are string.
But i'd like to know why this happen, and i'd appreciate suggestions about how to efficiently compare 'big' integers.
Thanks!
I use PHP 5.2 with IIS
No comments posted yet
Your Answer:
Login to answer
199 
53 
Other forums
Where do I put CRON code
So I've figured out alot about how to automatically run a php function. I can't figure out where to
Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result
what is wrong with this
Code: [Select]<?php
if ($_SERVER['HTTP_REFERER'])
{
php forms and database navigatio
Hello,
I'm new to php and i'd like to post the following.
I have written code to get records f
Looking for help reading a .txt or .ini file and outputting the info.
I have a file called Info.ini and It has the following info:
Code: [General]
Online=0
I wou
List/Menu Box
On an edit page when you want something to select what a user has previously selected from the datab
EU VAT Package 2010
Does any one know whether SAP will be developing new reporting functionality due the new VAT rules t
Not showing whole name with mail () script
I sent up a simple mail form with the PHP mail() script. One problem is when it sends an email with
'grab_files', multiple extension?
hey guys,
can anyone suggest a way to make to following line of code look for files with more
LOOPing Problem
Hello All!
The following code loops through the data and displays the data accordingly. My p
Dynamic memory problem
Hey,
At the beginning of my code, I have this line:
Shape* gShape = 0;
