Comments for PHP Reference Book Blog

Comment on Equal Sign in PHP: Equality and Not Equals by Matt Borja

Matt Borja — Fri, 23 Jul 2010 07:38:16 +0000

“Identical ( === ): Checks if the left and right values are equal AND identical”

It is also worth clarifying that the word “identical” is referring to comparison of variable data types. While using double equal signs (==) is appropriate for comparing the contents of two variables, using triple equal signs (===) is intended not only for comparing the contents of two variables, but comparing the data type (or the type of each variable).

The first example was a good illustration of this in the comments where variable $a is assigned an integer (int) value of 1 and variable $b was assigned a boolean (bool) value of TRUE.

Always remember that the data type of a variable is being set automatically by the *type* of value you assign it, whether it be integer (int), floating point (float), associative array (array), boolean (bool), class object (object) or even a resource (as in the case of MySQL queries). Therefore, use of the triple equal sign (===) for comparison is most appropriate when data types matter.

Comment on Display all PHP Errors and Warnings by Elliott

Elliott — Wed, 23 Jun 2010 17:55:11 +0000

Thanks, helped a lot!
T

Comment on Free PDF by younis zarger

younis zarger — Tue, 16 Feb 2010 17:25:07 +0000

Hi, thanks for providing free pdf. itz really a good work i personally appretiate you

Comment on Free PDF by Our Sponsors Rock! A Thank You From Dev-Tips | Dev Tips | Become a Better Developer, One Tip at a Time.

Sun, 07 Feb 2010 23:01:05 +0000

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Comment on Equal Sign in PHP: Equality and Not Equals by Camnio Media

Camnio Media — Tue, 12 Jan 2010 06:11:01 +0000

Thanks for the reference, I’m working on a php project.

Comment on PHP & Ampersand: Passing by Reference by Miha

Miha — Sat, 09 Jan 2010 16:40:35 +0000

Brandon is right! As of PHP 5.3.0, you will get a warning saying that “call-time pass-by-reference” is deprecated when you use & in $foo->setBar(“xxx”).

Besides objects are passed by reference by default.

Read here:http://www.webeks.net/programming/php/ampersand-operator-used-for-assigning-reference.html

Comment on Free PDF by lawrence77

lawrence77 — Mon, 04 Jan 2010 18:27:00 +0000

thanks for your book!

Comment on PHP & Ampersand: Passing by Reference by Brandon

Brandon — Thu, 03 Dec 2009 14:48:31 +0000

As Scott said, passing a reference in from the call will work, but it has been deprecated, so the following form is preferred:

function add(&$var){ // The & is before the argument $var
$var++;
}

Comment on Fixing strtotime -1 month by Mario Lurig

Mario Lurig — Wed, 11 Nov 2009 07:36:05 +0000

Yes, you can absolutely use strtotimefix(‘+1 month’) because if the problem happens at +1 month, then it will happen with -1 month as well, so the function will work the same way. You don’t want to arbitrarily choose +3 weeks, because that just won’t work in the long run.

Comment on Fixing strtotime -1 month by Sarel

Sarel — Wed, 11 Nov 2009 07:29:01 +0000

I found the same problem, where I was running this on 2009-10-31 and asking for date(‘Y-m-01′, strtotime(‘+ 1 month’)) gave me 2009-12-01. For me, because ’01′ for the day, I used ‘+ 3 weeks’ instead of ‘+ 1 month’.