in array multiple values

Question

How do I check for multiple values  such as    arg   array  foo   bar     if in array  foo   bar   arg     That s an example so you understand a bit better  I know it won t work

User · Answer

Going off of  Rok Kralj answer  best IMO  to check if any of needles exist in the haystack  you can use  bool  instead of    which sometimes can be confusing during code review   function in array any  needles   haystack       return  bool array intersect  needles   haystack      echo in array any  array 3 9   array 5 8 3 1 2        true  since 3 is present echo in array any  array 4 9   array 5 8 3 1 2        false  neither 4 nor 9 is present   https   glot io snippets f7dhw4kmju

User · Answer

As a developer  you should probably start learning set operations  difference  union  intersection   You can imagine your array as one  set   and the keys you are searching for the other   Check if ALL needles exist  function in array all  needles   haystack       return empty array diff  needles   haystack       echo in array all   3 2 5    5 8 3 1 2        true  all 3  2  5 present echo in array all   3 2 5 9    5 8 3 1 2        false  since 9 is not present   Check if ANY of the needles exist  function in array any  needles   haystack       return  empty array intersect  needles   haystack       echo in array any   3 9    5 8 3 1 2        true  since 3 is present echo in array any   4 9    5 8 3 1 2        false  neither 4 nor 9 is present

User · Answer

IMHO Mark Elliot s solution s best one for this problem  If you need to make more complex comparison operations between array elements AND you re on PHP 5 3  you might also think about something like the following    lt  php     First Array To Compare  a1   array  foo   bar   c        Target Array  b1   array  foo   bar         Evaluation Function - we pass guard and target array  b true   test   function  x  use   amp  b   b1            if   in array  x  b1                      b false                    Actual Test on array  can be repeated with others  but guard     needs to be initialized again  due to by reference assignment above  array walk  a1   test   var dump  b     This relies on a closure  comparison function can become much more powerful  Good luck

User · Answer

if empty array intersect  21 22 23 24    check with this      print  Not found even a single element     else    print  Found an element       array intersect   returns an array containing all the values of array1 that are present in all the arguments  Note that keys are preserved   Returns an array containing all of the values in array1 whose values exist in all of the parameters     empty       Determine whether a variable is empty  Returns FALSE if var exists and has a non-empty  non-zero value  Otherwise returns TRUE

User · Answer

Intersect the targets with the haystack and make sure the intersection is precisely equal to the targets    haystack   array         target   array  foo    bar     if count array intersect  haystack   target      count  target           all of  target is in  haystack     Note that you only need to verify the size of the resulting intersection is the same size as the array of target values to say that  haystack is a superset of  target   To verify that at least one value in  target is also in  haystack  you can do this check    if count array intersect  haystack   target    gt  0           at least one of  target is in  haystack

User · Answer

if in array  foo   arg   amp  amp  in array  bar   arg          both of them are in  arg    if in array  foo   arg     in array  bar   arg          at least one of them are in  arg

[php] in_array multiple values

Examples related to php

Examples related to arrays