Hi!
Is there a moment when one wants to put quotes (' or ") around numbers in php?
Fort example:
if ($_get["ssd"] == "0")
or should I put it?
if ($_get["ssd"] == 0)
Why do I want to put quotes around the 0?? Well, simply cause as you all already know, $_get vars are always strings!!
So in fact if $_get["ssd"] is empty, if ($_get["ssd"] == 0), will be true!! Problem here!!
Thank you!
You could try:
if(!isset($_GET["ssd"]))
To see if someone entered 0 in a text field rather than left it empty?Quote:
Why do I want to put quotes around the 0??
that wasn't my question
You do not need to put numbers in quotes, at any time in php.. and $_GET vars aren't always strings...what if you get an integer?
You haven't asked any question.Quote:
Originally Posted by aqw
== "0" and == 0 are both wrong unless you want numeric comparison. To compare strings, use either === or strcmp.
are you sure about that?Quote:
Originally Posted by Waffles
Try this:Quote:
You do not need to put numbers in quotes, at any time in php.. and $_GET vars aren't always strings...what if you get an integer?
PHP Code:echo gettype($_POST['age']);
tested $_get ... always a string!!!
there..integer.PHP Code:<?
echo '<a href="page.php?id=1">Link</a>';
if(isset($_GET['id'])) {
echo $_GET['id'];
// echos 1
}
?>
test with gettype!!!
the 1 it echos is a string boy!!!
PHP is loosely typed.. it'll cast between types for you to try to do whatever operation or comparison you want.
Functions like isset(), is_numeric(), ctype_alnum() allow you to validate input is in the format you want it.
is_numeric($_GET['id']) would return true
:rofl:Quote:
Originally Posted by aqw
Quote:
Originally Posted by Waffles
there..stringPHP Code:$str = "1";
echo $str; //echos 1
sorry if I sounded rude :)
They're both strings... but this is PHP, not Java, so it doesn't matter one bit.
http://www.zend.com/.../language.types.type-juggling.php
well true, types don't matter MUCH in PHP, but they do matter to some degree. since both strings and numbers are automatically evaluated to true/false...if you don't watch out, you may not get the expected result...though technically no error will occur.Quote:
Originally Posted by Dan Grossman
@agw: in your example used in your first post, quotes is the way to go, since anything obtained from the query string is a string (hence the name query string), it's always a good practice to compare it to the same type (instead of letting PHP interpret the type for you...which could lead to unexpected results), to ensure you get the results you want. technically it would be safer to convert it to an int first, but whether you do that before or after the if statement is up to you...its not required, and i don't feel its necessary.