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up vote -2 down vote favorite

Here are the arrays. 

Array1
(
[439] => dsaffsdfdfdfsffdsf
[379] => 3454
[375] => 3 ///why is it removed in the resulting array?
[436] => Fdsafdfsdf
[432] => 3  /// this one too
[431] => 2
[385] => 499
[434] => 3501
[435] => 2013-01-16
[430] => 1
[440] => fsdzsdaffdsfffdsf
[406] => YES
[438] => 32442344324324234
[376] => 3
)

Array2
(
[376] => 3
[385] => 499
)

array_diff(array1, array2)

result
(
[439] => dsaffsdfdfdfsffdsf
[379] => 3454
[436] => Fdsafdfsdf
[431] => 2
[434] => 3501
[435] => 2013-01-16
[430] => 1
[440] => fsdzsdaffdsfffdsf
[406] => YES
[438] => 32442344324324234
)

Looks weird to me. Any idea? Its removing based on value?

I just want Array2 elements removed from Array1

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4  
RTFM :) array_diff - Returns an array containing all the entries from array1 that are not present in any of the other arrays. –  Peter Jan 16 '13 at 23:42
1  
It's removing based on value, and the documentation says so. There's even an example that shows exactly this behavior. Perhaps you are looking for array_diff_assoc. –  Jon Jan 16 '13 at 23:44
 
Hmmm.. I didn't think so. I will try the assoc one. Thanks! –  Kevin Rave Jan 16 '13 at 23:44
2  
@KevinRave: Please don't try the assoc version. Just read the docs and decide if it does what you want. Programming is not randomly typing stuff until something works. –  Jon Jan 16 '13 at 23:45
 
I got it, @Jon. Thanks! –  Kevin Rave Jan 16 '13 at 23:48
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1 Answer

up vote 0 down vote accepted

Manual is your best friend:

  • array_diff() Compares array1 against array2 and returns the difference.
  • array_diff_assoc() Compares array1 against array2 and returns the difference. Unlike array_diff() the array keys are also used in the comparison.
  • array_diff_key() Compares the keys from array1 against the keys from array2 and returns the difference. This function is like array_diff() except the comparison is done on the keys instead of the values.
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