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Is there a diference between this comparisons ?
What is the diference between ! and === FALSE ?
if (!class_exists($class)) {
require($class.'.php');
}
if (class_exists($class) === FALSE) {
require($class.'.php');
}
In this case, no.
Some people think it’s good programming style to explicitly show that they’re comparing to a boolean. Personally… I don’t like it, but I guess the more verbose form is more obvious, as the ! operator isnt the mose visible thing when smashed between a parenthesis and other vertically’ish characters.