I bet you didn’t know that PHP strings don’t need quotes! Indeed PHP developers work with strings with either single or double quotes, but actually in some cases you don’t need them.
PHP by Book
Here’s how PHP developer declare a string, which is something very common in any programming language.
$my_var = 'hello world'; // or $my_var = "hello world";
What if you do the following:
That appears to be correct … Well, it’s not absolutely correct. You’ll be “noticed”.
// Notice: Use of undefined constant hello echo hello;
However if you disable error reporting, the code will be completely fine.
error_reporting(0); // no problem now echo hello;
What follows from the thing above is that you can use strings without quotes:
// hello echo hello; // hello world (concatenated) echo hello . ' world'; // helloworld echo hello . world;
However you can’t have spaces and most of the “special” symbols.
// syntax error echo hello world; // syntax error echo hello!;
Although you can do this in PHP, that is completely wrong. The code becomes more difficult to read and understand. In the second place you can miss a $ sign in front of a variable declaration and thus the PHP interpreter will assume this is a string. So disable error reporting isn’t so great sometimes.