"; echo Substract ($getal1, $getal2); ?>I make my function and i call it later by echo"ing it but what does that Return $totaal vày in the function. I never gọi it, but without that return i get blanks.
I must be missing some kind of ngắn gọn xúc tích in my brains....Bạn đã xem: Returning arrays from functions
return as the word itself says returns (gives back) something.In this case either $var1 + $var2 or $var1 - $var2.
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Variables inside of a function can"t usually be accessed outside of it.With return however you can get something from inside a function to use it oustide of it.
Return sets the function as a string, int, bool etc.
Without the key word return, the function is a blackhole.
In function Adding:
$totaal = $getal1 + $getal2;return $totaal; // return returns $getal1+getal2It can be shortened into:
return $getal1 + getal2;When you are doing echo Adding($getal1, $getal2);
You are actually doing echo $getal1 + $getal2;
The return statement immediately ends execution of the current function, & returns its argument as the value of the function call.
Without return you can echo it there itself like
function Adding ($getal1, $getal2) $totaal = $getal1 + $getal2; echo $totaal."";function Substract ($getal1, $getal2) $totaal = $getal1 - $getal2; echo $totaal;$getal1=10;$getal2=2;Adding ($getal1, $getal2);Substract ($getal1, $getal2);
You could probably understand what return does where a function will produce some value & you will need it khổng lồ be some where else.return statement stops the execution and goes to the calling line. Lượt thích -
function hello() return "welcome"; //return will send the produced value as a outcome of the function$result = hello();// store the value returned by the functionNow $result will have the value.The Return will only return the value once the function is called so the string: "Welcome Mr." together with the variable $name. That variable is going to be given a value when I hotline my function ("Piere"). Default, if I leave the field blank, I called my variable unknown, otherwise an error occurs. So:
function naming ($name="Unknown") return "Welcome Mr. $name"; echo naming ("Pierre"); return defines the returning value of your function. Your functions use two parameters & return a value. The first one returns the sum of two parameters & the second one subtract their values. For example
$a = Adding(3,2) // the value assigned to lớn $a will be 5$b = Substract(10,8) // the value assigned lớn $a will be 2 Return means that whatever value is returned, you can save it in a variable or use it by concatenation, I"ll provide two examples, one with return và one without
With return (note: when return is called, it stops the execution of a function after returning the value):
Function AddFive($number) Return $number += 5;$number = AddFive(10); // $number now holds the value of 15 incase I need to manupilate it or vày more stuffEcho $number;Without return:
Function AddFive($number) Echo $number += 5;AddFive(10); // this will echo out 15 immediately and I cannot manupilate itIt is always advisable khổng lồ use return with functions if you really need it because that way you"re seperating lô ghích and presentation. However, some functions you may soon write such as ones that affect databases don"t really need lớn return all values, meaning, use return if you need to lớn echo out the value or manupilate it, don"t use it if it does something that you don"t need to lớn manupilate