In PHP, you can declare constants in two ways: With define keyword define ('FOO', 1); Using const keyword const FOO = 1; What are the main differences between those two? When and why should you u...

When you use PHP's define () function, you're not defining a variable, you're defining a constant. Constants can't have their value modified once the script starts executing.

To be clear, the empty square brackets syntax for appending to an array is simply a way of telling PHP to assign the indexes to each value automatically, rather than YOU assigning the indexes.

UPDATE 2021: As of PHP 7 (which is several years old at this point) primitive types can also be declared for function arguments. Nullability can also be indicated with a ? in front of the type from 7.1 onward.

2012年11月23日 · Maybe in 2012, this was an acceptable answer, but using a define () for the content of the footer is not a good practice in today's php.

2009年9月17日 · @Pacerier, I don't understand your stubbornness. The question was 'How to define an empty object in PHP'. My answer is correct and I wrote to use "new stdClass ()". The code that I provided to user 'ed209' is correct and I used "new stdClass ()".

I have defined a constant in PHP e.g. define ('CONSTANT_NAME', 'constant_value'); I want to be able to change the value of this constant later on in the code. Can this be done? If so, how?

If you use Zend_Tool to generate your project, it should automatically add code in your index.php that defines a constant called APPLICATION_PATH which is an absolute path to your application folder in a ZF project.

2013年5月20日 · I definitely see a legit purpose for this. Some applications (Joomla components) provide their translations as constants. If you want to change a translation without changing the original source code/language file you can do it all in your custom language file using the functions above - as language files and source code tend to get update every now and then. Sure, using constants for ...

I have a php file in which I need to be able to easily flip a switch. The switch is set to 1 for local server and 0 for production server. local_on='1'; or local_on='0';. Which way is better (creating a global or using define)? If either way is good which way is best practice?