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What will be the result of the following operation?
$a = array_merge([1,2,3] + [4=>1,5,6]);
echo $a[2];
Suggested Answer: A
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40 comments · newest first
MI
Mireya
10 months ago
I agree, it should be 3!
HO
Hollis
11 months ago
Wait, is that even valid syntax?
BE
Bette
11 months ago
I think it might actually return false.
RE
Rebbeca
11 months ago
Definitely going to be 3.
EL
Elenore
11 months ago
The operation uses array_merge, so it combines arrays.
RE
Rebecka
12 months ago
I feel like this might lead to a parse error because of the way the arrays are being combined.
DE
Delpha
12 months ago
This question seems similar to one we practiced where we combined arrays, but I can't remember the exact output for this specific case.
ST
Stephen
12 months ago
I remember something about array_merge, but I can't recall if it handles numeric keys differently.
SE
Serita
1 year ago
I think the operation is trying to merge two arrays, but I'm not sure how the addition works with arrays in PHP.
LA
Lajuana
1 year ago
No problem, I've got this. Array merge is a common operation, and accessing array elements by index is straightforward. I'll work through it quickly and move on to the next question.
LU
Lucia
1 year ago
Ugh, array operations can be tricky. I'm a bit unsure about how the array merge will affect the final result. I'll need to work through this step-by-step to make sure I don't miss anything.
CH
Chanel
1 year ago
Alright, time to put my PHP skills to the test. I'm pretty confident I can figure this out, but I'll make sure to read the question thoroughly before answering.
MI
Mitsue
1 year ago
Okay, let's see. We have an array merge operation, and then we're trying to access the element at index 2. I think I know how to approach this, but I want to double-check my work.
MI
Mica
1 year ago
Hmm, this looks like it's testing our understanding of array operations. I'll need to carefully think through the steps to get the right answer.
TE
Teri
1 year ago
I'd say the result is 'a good time', but that's probably not the right answer for a certification exam.
FE
Felix
1 year ago
E) Parse error
SH
Sharan
1 year ago
B) 3
MA
Matilda
1 year ago
E) Parse error
VI
Vincent
1 year ago
B) 3
AR
Arlene
1 year ago
A) 4
KA
Katie
1 year ago
E) Parse error. The + operator is not valid for merging arrays in PHP, so this code will result in a syntax error.
PH
Phil
1 year ago
Make sure to use the correct syntax for merging arrays in PHP.
CA
Carin
1 year ago
Yes, you're right. The code will result in a syntax error.
DO
Donte
1 year ago
I think the answer is E) Parse error.
CH
Cherelle
1 year ago
I'm going with D) false. The array_merge function returns a new array, so $a[2] will not be defined, resulting in a false value.
SH
Sheron
1 year ago
I'm not sure, but I'll go with A) 4. It seems like a possible outcome.
YV
Yvonne
1 year ago
I agree with B) 3. The value at index 2 in the merged array is 3.
FR
France
1 year ago
I believe the correct answer is B) 3. The index 2 in the merged array corresponds to the value 3.
GU
Gussie
1 year ago
I think it's E) Parse error because the syntax of array_merge is incorrect.
DA
Daniel
1 year ago
The correct answer is C) 2. The + operator will merge the arrays, but it will preserve the keys from the second array, so the element at index 2 will be 2.
FL
Floyd
1 year ago
No, it's actually C) 2. The keys from the second array are preserved.
TO
Tonja
1 year ago
I think the answer is B) 3.
DA
Dannette
2 years ago
I think the answer is B) 3. The array_merge function will combine the two arrays, and the element at index 2 will be 3 from the first array.
VI
Vivan
1 year ago
You're welcome!
NO
Nohemi
1 year ago
Oh, I see. Thanks for clarifying.
EL
Elmira
1 year ago
No, it's actually A) 4. The keys from the second array will overwrite the keys from the first array.
SH
Shala
1 year ago
I think the answer is B) 3.
CI
Ciara
2 years ago
I'm not sure, but I think it might be a parse error.
LE
Leota
2 years ago
I believe it will be false.
WI
Wilda
2 years ago
I think the result will be 3.