Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trial
Obayanju Damilare
3,383 Pointsecho vs var_dump
I tried this and the input was 5 and 7, why isn't it 5 and 6. Thanks in advance.
$var = 5;
echo $var++;
echo ++$var;
1 Answer
Ashish Mehra
471 Points<?php $var = 5; //here $var is equal to 5
echo $var++; //here value increment by 1 but it returns original value i.e. 5 but $var is now 6
echo ++$var; //here $var is 6 but after increment it return the new value i.e. 7
?>
post increment return the old value after incrementing , pre increment return the new value after incrementing
Jason Anello
Courses Plus Student 94,610 PointsJason Anello
Courses Plus Student 94,610 Pointschanged from comment to answer
Obayanju Damilare
3,383 PointsObayanju Damilare
3,383 PointsHmm.... Thank you. But do you know any use case of the post increment; why would we want to return the old value first?
Erick Lopes
670 PointsErick Lopes
670 PointsObayanju Damilare
We use post increment when we want to increment the value of a variable after that particular line of code has been executed. There are situations in which this is very useful for exemple counters in repetition structures generally use post increment.