'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
what business processes?
Hi,
A general question. What business processes (like OTC - Order to Cach, P2P, R2R etc)
images aren't rendering
I'm trying to call a JPG file from within PHP (in an effort to hide the actual JPG folder). The imag
Solution Manager BPR
Does the SolMan-BPR-ARIS-Integration (http://www.ids-scheer.com/en/ARIS/ARIS_Platform/ARIS_Business_
PHP IMAGE UPLOAD SCRIPT
Hi for the last week i have been looking for scripts that will upload a photo to a certain folder wh
firefox wouldnt stream mp3 files completely from my php page
hi everyone,
I have a php file trying to read and stream mp3 files. It works fine in IE but my pr
simple php table loop
Hi all,
I've the following code
<?php // Create category options
Namespace Problem
I'm having problem with a section of code with a variable namespace.
This code works fine:
Filtering for a phrase using pregmatch
Here is my code which looks for addresses which start with ' src=" '
Code: [Select]preg_
Save file by click
Hello.
I'm not understand how to save file from page. I'd like make link to file with save abil
Including calander to page - will not show other months than current??
im trying to add an existaing calander onto a profile page by using Code: <?php include "